REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
+5 V Powered
RS-232/RS-422 Transceiver
AD7306
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FEATURES
RS-232 and RS-422 on One Chip
Single +5 V Supply
0.1 F Capacitors
Short Circuit Protection
Excellent Noise Immunity
Low Power BiCMOS Technology
High Speed, Low Skew RS-422 Operation
40 C to +85 C Operations
APPLICATIONS
DTE-DCE Interface
Packet Switching
Local Area Networks
Data Concentration
Data Multiplexers
Integrated Services Digital Network (ISDN)
GENERAL DESCRIPTION
The AD7306 line driver/receiver is a 5 V monolithic product
which provides an interface between TTL signal levels and dual
standard EIA RS-232/RS-422 signal levels. The part contains
two RS-232 drivers, one RS-422 driver, one RS-232 receiver,
and one receiver path which can be configured either as RS-232
or as RS-422.
An internal charge pump voltage converter facilitates operation
from a single +5 V power supply. The internal charge pump
generates
10 V levels allowing RS-232 output levels to be de-
veloped without the need for external bipolar power supplies.
A highly efficient charge pump design allows operation using
non polarized, miniature 0.1
F capacitors. This gives a consid-
erable saving in printed circuit board space over conventional
products which can use up to 10
F capacitors. The charge
pump output voltages may also be used to power external cir-
cuitry which requires dual supplies.
The RS-232 channels are suitable for communications rates up
to 100 kHz and the RS-422 channels are suitable for high speed
communications up to 5 MHz. The RS-422 transmitter comple-
mentary outputs are closely matched and feature low timing
skew between the complementary outputs. This is often an es-
sential requirement to meet tight system timing specifications.
All inputs feature ESD protection, all driver outputs feature
high source and sink current capability and are internally pro-
tected against short circuits on the outputs. An epitaxial layer is
used to guard against latch-up.
The part is available in a 24-lead SOIC and 24-pin plastic DIP
package.
FUNCTIONAL BLOCK DIAGRAM
V+
C1+
C1
V
C2
C2+
GND
NC
NC
NC = NO CONNECT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
16
15
14
13
20
19
18
17
AD7306
SOIC
TOP VIEW
(Not to Scale)
GND
R1
IN
/R1
IN
(A)
T2
OUT
T1
OUT
R2
IN
R1
IN
(B)
T3
OUT
(B)
R2
OUT
T3
IN
232/422 SEL
V
CC
R1
OUT
T1
IN
T2
IN
T3
OUT
(A)
REV. B
2
AD7306SPECIFICATIONS
(V
CC
= +5 V 5%, C1 = C2 = C3 = C4 = 0.1 F. All specifications T
MIN
to
T
MAX
unless otherwise noted.)
Parameter
Min
Typ
Max
Units
Test Conditions/Comments
RS-232 DRIVER
TTL Input Logic Low, V
INL
0.8
V
TTL Input Logic High, V
INH
2.0
V
Input Logic Current
0.1
10
A
V
IN
= 0 V to V
CC
RS-232 High Level Output Voltage
5.0
7.3
V
R
L
= 3 k
RS-232 Low Level Output Voltage
5.0
6.5
V
R
L
= 3 k
Output Short Circuit Current
5
12
mA
V
OUT
= 0 V, T
A
= 0
C to +70
C
Slew Rate
8
20
30
V/
s
C
L
= 50 pF, R
L
= 3 k
4
V/
s
C
L
= 2500 pF, R
L
= 3 k
Output Resistance (Powered Down)
300
10M
V
CC
= 0 V, V
OUT
=
3 V
RS-232 RECEIVER
Input Voltage Range
15
+15
V
RS-232 Input Threshold Low
0.8
1.3
V
RS-232 Input Threshold High
1.7
2.4
V
RS-232 Input Hysteresis
0.1
0.4
1.0
V
RS-232 Input Resistance
3
5
7
k
TTL Output Voltage Low, V
OL
0.2
0.4
V
I
OUT
= +4 mA
TTL Output Voltage High, V
OH
3.5
4.8
V
I
OUT
= 4 mA
RS-422 DRIVER
TTL Input Logic Low, V
INL
0.8
V
TTL Input Logic High, V
INH
2.0
V
Logic Input Current
0.1
10
A
V
IN
= 0 V to V
CC
Differential Output Voltage
5.0
V
V
CC
= 5 V, R
L
Diff =
; Figure 3
2
V
R
L
Diff = 100
; Figure 3
Common-Mode Output Voltage
3
V
|V
OUT
| for Complementary O/P States
0.2
V
R
L
Diff = 100
Output Short Circuit Current
35
150
mA
0 V
V
CMR
+7 V
RS-422 RECEIVER
Common-Mode Voltage Range
7
V
Typical RS-422 Input Voltage <5 V
Differential Input Threshold Voltage
0.2
+0.2
V
Input Voltage Hysteresis
70
mV
V
CM
= 0 V
Input Resistance
3
5
7
k
TTL Output Voltage Low, V
OL
0.2
0.4
V
I
OUT
= +4.0 mA
TTL Output Voltage High, V
OH
3.5
4.8
V
I
OUT
= 4.0 mA
232/422 SEL Input
Input Logic Low, V
INL
0.8
V
Input Logic High, V
INH
2.0
V
Logic Input Current
0.1
10
A
V
IN
= 0 V to V
CC
POWER SUPPLY CURRENT
I
CC
10
15
mA
Outputs Unloaded
CHARGE PUMP VOLTAGE GENERATOR
V+ Output Voltage
9
V
RS-232 Output Unloaded;
See Typical Performance Curves
V Output Voltage
9
V
RS-232 Outputs Unloaded;
See Typical Performance Curves
Generator Rise Time
200
s
Specifications subject to change without notice.
AD7306
REV. B
3
Parameter
Typ
Max
Units
Test Conditions/Comments
RS-422 Driver
Propagation Delay Input to Output T
PLH
, T
PHL
35
100
ns
R
L
Diff = 100
. C
L1
= C
L2
= 100 pF, Figures 2 & 4
RS-422 O/P to O/P T
SKEW
2
10
ns
R
L
Diff = 100
. C
L1
= C
L2
= 100 pF, Figures 2 & 4
Driver Rise/Fall Time T
R
, T
F
15
40
ns
R
L
Diff = 100
. C
L1
= C
L2
= 100 pF, Figures 2 & 4
RS-422 Receiver
Propagation Delay Input to Output T
PLH
, T
PHL
70
200
ns
C
L
= 15 pF. Figure 5
RS-232/RS-422 Enable
RS-232 Disable to RS-422 Enable T
EN1
70
200
ns
Figure 6
RS-422 Disable to RS-232 Enable T
EN2
70
200
ns
Figure 6
Transmission Rate (RS-422)
5
MHz
RS-232 Receiver
Propagation Delay Input to Output
1000
ns
Transmission Rate (RS-232)
100
kHz
C
L
= 50 pF
20
kHz
C
L
= 2.5 nF
TIMING SPECIFICATIONS
(V
CC
= +5 V 5%, C1 = C2 = C3 = C4 = 0.1 F. All specifications T
MIN
to T
MAX
unless otherwise noted.)
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25
C unless otherwise noted)
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . (V
CC
0.3 V) to +13.2 V
V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to 13.2 V
Inputs
T1
IN
, T2
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V to V+
T3
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to V+
R1
IN
A/B, R2
IN
. . . . . . . . . . . . . . . . . . . . . . . 25 V to +25 V
232/422 SEL . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to V+
Outputs
T1
OUT
, T2
OUT
. . . . . . . . . . . . . . . . . . . . . . . 15 V to +15 V
T3
OUT
(A), (B) . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
R1
OUT
, R2
OUT
. . . . . . . . . . . . . . . . 0.3 V to (V
CC
+ 0.3 V)
Short Circuit Duration
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Power Dissipation
Small Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 mW
DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 mW
Operating Temperature Range
Commercial (J Version) . . . . . . . . . . . . . . . . . 0
C to +70
C
Industrial (A Version) . . . . . . . . . . . . . . . . 40
C to +85
C
Storage Temperature Range . . . . . . . . . . . . 65
C to +150
C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . +300
C
*Stresses above those listed under "Absolute Maximum Ratings" may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those listed in the
operational sections of this specification is not implied. Exposure to absolute
maximum ratings for extended periods of time may affect device reliability.
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7306 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
AD7306JR
0
C to +70
C
24-Lead SOIC
R-24
AD7306JN
0
C to +70
C
24-Pin DIP
N-24
AD7306AR
40
C to +85
C
24-Lead SOIC
R-24
AD7306AN
40
C to +85
C
24-Pin DIP
N-24
AD7306
4
REV. B
PIN FUNCTION DESCRIPTION
SOIC
DIP
Pin
Pin
Mnemonic
Function
1
19
V+
Internally Generated Positive Supply (+9 V nominal). A 0.1
F capacitor must be connected
between this pin and GND.
2, 3
20, 22
C1+, C1
External Capacitor 1 Terminals. A 0.1
F capacitor must be connected between these pins.
4
23
R2
IN
RS-232 Receiver R2 Input. This input accepts RS-232 input voltages.
5
24
T1
OUT
RS-232 Transmitter (Driver) T1 Output (Typically
7.5 V).
6
1
T2
OUT
RS-232 Transmitter (Driver) T2 Output (Typically
7.5 V).
7
2
V
CC
Power Supply Input (5 V
5%).
8
3
R1
IN
(B)
RS-422 Receiver R1, Differential Input B.
9
4
R1
IN
/R1
IN
(A)
Receiver R1 Input. May be configured to accept either single ended RS-232 levels or
differential RS-422 levels. It is configured using the 232/422 SEL pin.
10
5
T3
OUT
(B)
RS-422 Transmitter (Driver) T3, Differential Output B.
11
6
T3
OUT
(A)
RS-232 Transmitter (Driver) T3, Differential Output A.
12, 13
16, 21
NC
No Connect Pins.
14, 18
7, 11
GND
Ground Pin. Must be connected to 0 V.
15
8
232/422 SEL
Select Input. This input configures Receiver R1 to accept either RS-232 or RS-422 signal lev-
els. A Logic 1 on this input selects 232 operation while a Logic 0 selects 422 operation.
16
9
T3
IN
TTL/CMOS Input to the RS-422 Transmitter T3.
17
10
R1
OUT
TTL/CMOS Output from Receiver R1.
19
12
T2
IN
TTL/CMOS Input to RS-232 Transmitter T2.
20
13
T1
IN
TTL/CMOS Input to RS-232 Transmitter T1.
21
14
R2
OUT
TTL/CMOS Output from Receiver R2.
22, 23
15, 17
C2+, C2
External Capacitor 2 Terminals. A 0.1
F capacitor must be connected between these pins.
24
18
V
Internally Generated Negative Supply (9 V nominal). A 0.1
F capacitor must be connected
between this pin and GND.
PIN CONFIGURATIONS
SOIC
V+
C1+
C1
V
C2
C2+
GND
NC
NC
NC = NO CONNECT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
16
15
14
13
20
19
18
17
AD7306
SOIC
TOP VIEW
(Not to Scale)
GND
R1
IN
/R1
IN
(A)
T2
OUT
T1
OUT
R2
IN
R1
IN
(B)
T3
OUT
(B)
R2
OUT
T3
IN
232/422 SEL
V
CC
R1
OUT
T1
IN
T2
IN
T3
OUT
(A)
DIP
R1
IN
/R1
IN
(A)
V+
C1+
C1
V
C2
C2+
GND
NC
NC
T2
OUT
T1
OUT
R2
IN
R1
IN
(B)
T3
OUT
(B)
R2
OUT
T3
IN
232/422 SEL
V
CC
NC = NO CONNECT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
16
15
14
13
20
19
18
17
AD7306
DIP
TOP VIEW
(Not to Scale)
GND
R1
OUT
T1
IN
T2
IN
T3
OUT
(A)
AD7306
REV. B
5
t
PHL
t
PLH
1.5V
1.5V
90% POINT
10% POINT
3V
0V
VO
VO
0V
VO
1/2 VO
t
SKEW
t
R
t
F
t
SKEW
90% POINT
10% POINT
T3 (B)
OUT
OUT
T3 (A)
Figure 4. RS-422 Driver. Propagation Delay Rise/Fall
Timing
t
PLH
t
PHL
2.5V
2.5V
0V
0V
V
OL
V
OH
R1
OUT
DIFFERENTIAL
INPUT
R1 (B) - R1 (A)
IN
IN
Figure 5. RS-422 Receiver Timing
t
EN2
t
EN1
1.5V
1.5V
V
OL
V
OH
R1
OUT
232/422 SEL
V
OL
V
OH
RS-232
RS-422
RS-232
Figure 6. RS-232/RS-422 Receiver Enable Timing
R1 (B)
IN
10V
POWER
SUPPLY
GENERATOR
T2
OUT
T1
OUT
R2
OUT
R1
OUT
T1
IN
T2
IN
R2
IN
AD7306
R1
RS-232
INPUT
RS-232
OUTPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
T3
IN
232/422 SEL
T3 (B)
OUT
T3 (A)
OUT
RS-422
OUTPUT
RS-232/
RS-422
INPUT
RS-422
INPUT
R1
IN
/R1
IN
(A)
8
9
15
17
R2
21
4
T3
7
2
3
23
22
24
1
0.1
F
0.1
F
0.1
F
0.1
F
+5V INPUT
V
CC
V+
C1+
C1
11
10
16
19
6
C2
C2+
V
T2
T1
20
5
0.1
F
14
18
Figure 1. AD7306 Application Circuit
T3
C = 100pF
L1
T3 (B)
OUT
RL = 100
DIFF
T3
IN
OUT
T3 (A)
C = 100pF
L2
Figure 2. RS-422 Driver. Propagation Delay Test Circuit
T3
T3 (B)
OUT
T3
IN
OUT
T3 (A)
RL
DIFF
V
OD
Figure 3. RS-422 Driver. Voltage Measurement Test
Circuit
AD7306
6
REV. B
GENERAL DESCRIPTION
The AD7306 drivers/receivers provide an interface which is
compatible with RS-232/RS-422 standard interfaces. As both
standards are widely accepted it is often necessary to provide an
interface which is compatible with both. The AD7306 is ideally
suited to this type of application as both standards may be met
using a single package. This part contains two RS-232 drivers,
one RS-422 driver, one RS-232 receiver, and one receiver path
which can be configured as either RS-232 or RS-422. This re-
ceiver is configured using the 232/422 SEL pin.
This part also contains an internal charge pump voltage con-
verter which facilitates operation using a single +5 V power
supply.
Charge Pump DC-DC Voltage Generator
The charge pump voltage generator uses a switched capacitor
technique to develop
10 V levels from an input +5 V supply. A
highly efficient charge pump design coupled with a high fre-
quency internal oscillator permit operation using four 0.1
F
capacitors.
10V
POWER SUPPLY
GENERATOR
+5V
INPUT
SUPPLY
+10V
OUTPUT
10V
OUTPUT
C3
0.1
F
C4
0.1
F
C1+
C1
C2+
C2
V
V+
C1
0.1
F
C2
0.1
F
V
CC
Figure 7. Charge Pump Voltage Generator
Capacitors C1 and C2 act as charge storage capacitors while C3
and C4 provide output smoothing. For correct operation all four
capacitors must be included. Either polarized or nonpolarized
capacitors may be used for C1C4. If a polarized type is used,
then the correct polarity should be observed. This may be ig-
nored with nonpolarized type capacitors.
The charge pump output voltages, V+ and V, are used inter-
nally to power the RS-232 transmitters. This permits RS-232
output levels to be developed on the RS-232 transmitter out-
puts. The charge pump output voltages may also be used to
power external circuitry if the current requirements are small.
Please refer to the Typical Performance Characteristics.
The generator rise time after power up is 200
s typical. This
time is necessary to completely charge the storage capacitors in
the charge pump. Therefore, RS-232 data transmission should
not be initiated until this time has elapsed after switch on. This
will ensure that valid data is always transmitted.
RS-232 Drivers
The RS-232 drivers in the AD7306 meet the EIA RS-232
specifications. The drivers are inverting level shifters which
convert TTL/CMOS levels into RS-232 output levels. The in-
put switching threshold is typically 1.3 V. With a typical
RS-232 load, the output levels are
7.5 V. Under worst case
load conditions, the drivers are guaranteed to provide
5 V
which meets the minimum RS-232 requirement. The output
slew rate is internally limited to <30 V/
s without the need for
an external slew limiting capacitor. Short circuit protection is
also provided which prevents damage in the event of output
fault conditions. Active current limiting is used which limits the
output short circuit current to less than 12 mA in the event of
an output fault. This type of current limiting does not degrade
the output voltage swing under normal loading conditions as
would be the case with conventional passive limiting.
The powered-down output impedance is typically 10 M
. This
is considerably larger than the 300
minimum value required
by the RS-232 specification. It provides additional protection
under fault conditions where another powered-up transmitter
output is inadvertently shorted to the powered-down device.
RS-232 Receivers
The receivers are inverting level shifters which accept RS-232
input levels (
3 V to
15 V) and translates them into 5 V
TTL/CMOS levels. The input switching thresholds are 0.8 V
minimum and 2.4 V maximum which are well within the
RS-232 requirement of
3 V. Internal 5 k
pull-down resistors
to GND are provided on the receiver inputs. This ensures that
an unconnected input will be interpreted as a low level giving a
Logic "1" on the TTL/CMOS output. Excellent noise immu-
nity is achieved by the use of hysteresis and internal filtering
circuitry. The filter rejects noise glitches of up to 0.5
s in
duration.
RS-422 Driver
The RS-422 driver on the AD7306 accepts a TTL/CMOS in-
put and translates it into a differential RS-422 level signal. The
input switching threshold is typically 1.3 V. The unloaded out-
put differential voltage is typically
5 V (see Typical Perfor-
mance Characteristics). Short circuit protection is provided on
the output which limits the current to less than 150 mA.
RS-422 Receiver
The RS-422 receiver on the AD7306 accepts a differential in-
put signal and translates it into a TTL/CMOS output level.
The input resistance on both differential inputs is 5 k
typical.
With the receiver inputs unconnected (floating), internal bias-
ing ensures that the receiver output is a Logic "1."
Excellent noise immunity and high transmission speed is
achieved using the differential configuration.
Typical Performance CharacteristicsAD7306
REV. B
7
10
0
30
6
2
5
4
0
8
25
20
15
10
OUTPUT CURRENT
mA
VOLTAGE OUTPUT
V
V+
V-
V = 5V
T + 25
C
CC
Figure 8. V+ and V Voltage vs. Current
25
0
2500
5
0
15
10
20
2000
1500
1000
500
LOAD CAPACITANCE pF
SLEW RATE V/
s
V
E
+V
E
Figure 9. RS-232 Driver Slew Rate vs. Load Capacitance
10
90
100
0%
A4 -0 370 V
1
s
5V
5V
Figure 10. RS-232 Driver; R
L
= 5 k
, C
L
= 50 pF
10
0
10
6
2
2
4
0
8
8
6
4
RS-232 TRANSMITTER OUTPUT CURRENT mA
RS-232 TRANSMITTER OUTPUT VOLTAGE
V
V CURRENT
E
+V CURRENT
E
Figure 11. RS-232 Driver Output Voltage vs. Current
6
0
60
3
1
10
2
0
5
4
50
40
30
20
DIFFERENTIAL O/P CURRENT mA
DIFFERENTIAL O/P VOLTAGE V
V = 5.25V
CC
V = 5.0V
CC
V = 4.75V
CC
Figure 12. RS-422 Driver Output Current vs. Output Voltage
10
90
100
0%
10ns
5
1V
1V
A3
2 4 V
Figure 13. RS-422 Driver; R
LDIFF
= 100
, C
L1
= C
L2
= 100 pF
AD7306
8
REV. B
C1624a28/94
PRINTED IN U.S.A.
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
Single-Ended Data Transmission
Single-ended interfaces are used for low speed, short distance
communications such as from a computer terminal to a printer.
A single line is used to carry the signal. Various standards have
been developed to standardize the communication link, the most
popular of these being the RS-232. The RS-232 standard was
introduced in 1962 by the EIA and has been widely used
throughout the industry. The standard has been revised several
times, and the current revision is known as EIA-232E. The
RS-232 standard is suitable for single-ended data transmission
at relatively slow data rates over short distances. A typical
RS-232 interface is shown in Figure 14.
RS-232 CHANNEL
DATA
IN
DATA
OUT
RX
TX
Figure 14. Single-Ended RS-232 Interface
Differential Data Transmission
When transmitting at high data rates, over long distances and
through noisy environments, single-ended data transmission is
often inadequate. In this type of application, differential data
transmission offers superior performance. Differential transmis-
sion uses two signal lines to transmit data. It rejects ground
shifts and is insensitive to noise signals which appear as com-
mon mode voltages on the transmission lines. To accommodate
faster data communication, the differential RS-422 standard was
developed. Therefore, it can be used to reliably transmit data at
higher speeds and over longer distances than single-ended trans-
mission. A typical RS-422 interface is shown in Figure 15.
RS-422 CHANNEL
DATA
IN
DATA
OUT
RX
TX
Figure 15. Differential RS-422 Interface
Table I. Comparison of RS-232 and RS-422 Interface Standards
Specification
EIA-232E
RS-422
Transmission Type
Single-Ended
Differential
Maximum Data Rate
20 kB/s
10 MB/s
Maximum Cable Length
Load Dependent
4000 ft.
Minimum Driver Output Voltage
5 V
1.5 V
Slew Rate
30 V/
s max
Receiver Input Resistance
3 k
to 7 k
4 k
min
Receiver Input Sensitivity
3 V
200 mV
Receiver Input Voltage Range
15 V
7 V
No. of Drivers per Line
1
1
No. of Receivers per Line
1
10
24-Lead SOIC (R-24)
24
13
12
1
0.6141 (15.60)
0.5985 (15.20)
0.4193 (10.65)
0.3937 (10.00)
0.2992 (7.60)
0.2914 (7.40)
PIN 1
SEATING
PLANE
0.0118 (0.30)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
0.1043 (2.65)
0.0926 (2.35)
0.0500
(1.27)
BSC
0.0125 (0.32)
0.0091 (0.23)
0.0500 (1.27)
0.0157 (0.40)
8
0
0.0291 (0.74)
0.0098 (0.25)
x 45
24-Lead Pin Plastic DIP (N-24)
0.260
0.001
(6.61
0.03)
0
- 15
0.11 (2.79)
0.09 (2.28)
SEATING
PLANE
1.228 (31.19)
1.226 (31.14)
0.02 (0.5)
0.016 (0.41)
0.07(1.78)
0.05 (1.27)
0.130 (3.30)
0.128 (3.25)
0.32 (8.128)
0.30 (7.62)
0.011 (0.28)
0.009 (0.23)
NOTES
1.
2.
LEAD NO. 1 IDENTIFIED BY DOT OR NOTCH.
PLASTIC LEADS WILL BE EITHER SOLDER DIPPED OR TIN LEAD PLATED
IN ACCORDANCE WITH MIL-M-385 10 REQUIREMENTS.
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