UNIVERSAL 15 MEMORY DIALER
S5T5855A
1
INTRODUCTION
The S5T5855A is 15 memory Tone/pulse switchable dialer with 32 digit
redial memory. 16 digit indirect 10 memory and 16 digit direct 4
memory are possible.
The Flash time is selectable on the keypad Also, Hands-Free and Hold
functions are controlled on the keypad. The S5T5855A can fulfill all the
standards of each country.
FEATURES
Flash Time selectable on the keyboard (100, 303, 604 mS)
Hands-Free and Hold functions
Tone/Pulse switchable
16 digit indirect (Two-touch) 10 memory (Pulse: 16 digit, Tone: 15 digit)
16 digit direct (One-touch) 4 memory (Pulse: 16 digit, Tone: 15 digit)
Uses 3.579545MHz Color burst Crystal or ceramic resonator
Pulse rate selectable. (10 pps, 20 pps)
Make/Break ratio selectable (40: 60, 33 : 66)
Single tone enable for test
Tone (T/
) key function (Pulse
Tone)
Redial function (Pulse : 32 digit, Tone: 31 digit)
Pin compatible with S5T5820C, S5T0080A, and S5T5850
ORDERING INFORMATION
*HFD
: Hands Free Dialing Function
*HOLD : Hold for Melody
*EM
: Emergency Memory
Device
Package
Function
HFD
HOLD
EM
Flash Time
M/B Ratio
PPS
S5T5855A01-D0B0
22
-
DIP
-
400
O
O
O
Selectable
Selectable
Selectable
22
-
DIP
-
400
UNIVERSAL 15 MEMORY DIALER
S5T5855A
3
PIN CONFIGURATION
ARRANGEMENT OF KEY BOARD
SELECTION FUNCTION
PIN
CONNECTION
FUNCTION
V
DD
PULSE MODE/20 PPS
MDS/DRS
OPEN
PULSE MODE/10 PPS
V
SS
TONE MODE
MAKE/BREAK
V
DD
1 : 2 (M : B)
V
SS
2 : 3 (M : B)
1
2
3
4
5
6
7
8
9
12
13
14
15
16
17
18
19
20
S5T5855A
R5
R1
R2
R3
R4
HS
M/B
MDS/DRS
OSCI
C3
C2
C1
DP
V+
V
SS
V
DD
HDO
10
11
OSCO
C5
21
22
HFO
C4
X' MUTE
1
2
3
ST
EM1
4
5
6
R/L
EM2
7
8
9
RD/P
EM3
T/
0
#
F3
EM4
HFI
HDI
F1
F2
NU
-
RD/P
: Redial/Pause
-
ST
: Store
-
R/L
: Recall/Location
-
F1
: Flash Time (100ms)
-
F2
: Flash Time (303ms)
-
F3
: Flash Time (604md)
-
HFI
: Hands-Free Dialing Key Input
-
HDI
: Hold Key Input
-
T/
: Pulse
Tone Mode
-
#
: RD/P Function in Pulse Mode Data in Tone Mode
-
EMI
: Direct Memory Location I = 1, 2, 3, 4.
-
Nu
: Not Used Key
S5T5855A
UNIVERSAL 15 MEMORY DIALER
4
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
Pin No
Symbol
I/O
Description
1
R5
2
R1
3
R2
I
Row key input
4
R3
5
R4
6
HS
I
Hook switch
7
M/B
I
Make/Break select
8
MDS/DRS
I
Mode & dial pulse ratio select pin
9
OSCI
I
Oscillator input
10
OSCO
O
Oscillator output
11
C5
I
Column 5 input
12
HDO
O
Hold function control output
13
V
DD
S
(+) Power
14
V
SS
S
(
-
) Power
15
TONE
O
Tone output
16
X
'
MUTE
O
X
'
MUTE Output (N-channel open drain)
17
DP
O
Dial pulse output (C-MOS inverter output)
18
C1
19
C2
I
Column key input
20
C3
21
C4
22
HFO
O
Hands-free control output
Characteristic
Symbol
Value
Unit
Supply Voltage
V
DD
-
0.3 to 7.0
V
Input Voltage
V
I
-
0.2 to V
DD
+ 0.3
V
Output Voltage
V
O
-
0.3 to V
DD
+ 0.3
V
Power Dissipation
P
D
500
mW
Operating Temperature
T
OPR
-
20 to + 70
C
Storage Temperature
T
STG
-
55 to + 150
C
UNIVERSAL 15 MEMORY DIALER
S5T5855A
5
ELECTRICAL CHARACTERISTICS
(V
DD
= 3.5V, V
SS
= 0V, Ta = 25
C , f
osc
= 3.579545MHz)
Characteristic
Symbol
Test conditions
Min.
Typ.
Max.
Unit
Operating Voltage
V
DD
-
2.0
-
6.0
V
Memory Retention Voltage
V
MR
-
1.0
-
-
Memory Retention Current
I
MR
HS = V
DD
= 1.0V
-
0.05
0.1
uA
Operating Current
I
DD(PULSE)
All output
unload
Pulse Mode
-
0.1
0.3
mA
I
DD(TONE)
Tone Mode
-
0.4
0.7
Standby Current
I
SB
HS = V
SS
-
10
50
A
Output Sink Current
I
O(SINK)1
V
OL
= 0.4V
1.7
5.0
-
mA
(DP, X
'
MUTE)
I
O(SINK)2
V
OL
= 0.4V, V
DD
= 2.5V
0.5
1.5
-
mA
Output Current
I
OH
V
OH
= 0.3V
1.8
5.2
-
mA
I
OL
V
OL
= 0.4V
1.7
5.1
-
mA
Input Voltage
V
IH
R1 to R5, M/B, HS
0.8V
DD
-
V
DD
V
V
IL
C1 to C5, MDS/RDS, HS
V
SS
-
0.2V
DD
V
Input Current
I
I1
R1 to R5, V
IN
= V
SS
-
-
50
A
I
I2
R1 to R5, V
IN
= V
SS
V
DD
= 2.5V
-
-
30
A
Column to Row Tone Ratio
dBcr
Tone Mode
1
2
3
dB
Row Tone Output
V
OH(TONE)
R
L
= 5.0Kohm
-
18
-
-
16
dBV
V
OL(TONE)
V
DD
= 2.5V, R
L
= 5.0Kohm
-
18
-
-
16
Tone Distortion
THD
-
-
1
4
%
Valid Key Entry Time
t
KD
-
-
33.3
-
mS
Pause Time
t
PA
P Key Depress
-
3.6
-
Sec
Pulse Interdigit
t
PIDP1
MDS/DRS = V
DD
(20 PPS)
-
600
-
Pause Time
t
PIDP2
MDS/DRS = OPEN(10 PPS)
-
800
-
Tone interdigit pause time
t
TIDP
MDS/DRS = V
SS
-
103.5
-
mS
Tone Duration
t
TD
-
-
101
-
Pulse to tone auto pause time
t
PTPA
-
-
3.6
-
Make/Break Time
t
M/B
MDS/DRS =
OPEN (10 PPS)
M/B = V
DD
-
33.5/67.0
-
mS
M/B = V
SS
-
40.2/60.3
-
MDS/DRS =
V
DD
(20 PPS)
M/B = V
DD
-
16.7/33.5
-
M/B = V
SS
-
20.1/30.2
-
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