Samsung S5T58555A01-D0B0 Datasheet
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
S5T5855A UNIVERSAL 15 MEMORY DIALER
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BLOCK DIAGRAM
OSC DIVIDER
M/B
COUNTER
PULSE
COUNTER
CONTROL
CIRCUIT
SYSTEM
CLOCK
TIMING
COUNTER
DEBOUNCE
CIRCUIT
KEY
INPUT
INTERFACE
CIRCUIT
RECALL/LOCATION
LATCH & ADDRESS
COUNTER
REDIAL
RAM
DATA
LATCH
14 MEMORY
STORE RAM
ROW, COLUMN
SINEWAVE
COUNTER &
D/A CONVERTER
WRITE/READ
ADDRESS
COUNTER
HANDS FREE & HOLD
CONTROL OUTPUT
OSCI
OSCO
M/B
HS
MDS/DRS
C1
C2
C3
C4
C5
R1
R2
R4
R3
R5
V
DD
DP
TONE
HFO V
SS
HDO
X’ MUTE
4
4
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 VDD + 0.3 V
Output Voltage V
O
− 0.3 to VDD + 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
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