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UNIVERSAL 15 MEMORY DIALER

S5T5855A

UNIVERSAL 15 MEMORY DIALER
S5T5855A
INTRODUCTION
The S5T5855A is 15 memory Tone / pulse switchable dialer with 32 digit redial memory. It can store up to 10 phone numbers in the 16-digit indirect memory and up to 4 phone numbers in the 16-ditis direct memory. The Flash time is selectable on the keypad. Hands-Free and Hold functions are controlled on the keypad as well. The S5T5855A can fulfill all the standards of each country.
22-DIP-400
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
Device S5T5855A01-D0B0 Package 22-DIP-400 Function HFD O HOLD O EM O Flash Time Selectable M / B Ratio Selectable PPS Selectable
HFD : Hands Free Dialing Function HOLD : Hold for Melody EM : Emergency Memory
S5T5855A
UNIVERSAL 15 MEMORY DIALER
BLOCK DIAGRAM
OSCI OSCO M / B OSC DIVIDER
M / B COUNTER
PULSE COUNTER
HS CONTROL CIRCUIT MDS / DRS
SYSTEM CLOCK
TIMING COUNTER
DEBOUNCE CIRCUIT
C1 C2 C3 C4 C5 R1 R2 R3 R4 R5 KEY INPUT INTERFACE CIRCUIT
RECALL / LOCATION LATCH & ADDRESS COUNTER
14 MEMORY STORE RAM
ROW, COLUMN SINEWAVE COUNTER & D / A CONVERTER
HANDS FREE & HOLD CONTROL OUTPUT
UNIVERSAL 15 MEMORY DIALER
S5T5855A
PIN CONFIGURATION
R5 R1 R2 R3 R4 HS M / B MDS / DRS OSCI OSCO C5
ARRANGEMENT OF KEY BOARD 1 4 7 T / HFI 2 5 8 0 HDI 3 6 9 # F1 ST R / L RD / P F3 F2 EM1 EM2 EM3 EM4 NU
SELECTION FUNCTION PIN MDS / DRS MAKE / BREAK CONNECTION VDD OPEN VSS VDD VSS FUNCTION PULSE MODE / 20 PPS PULSE MODE / 10 PPS TONE MODE 1 : 2 (M : B) 2 : 3 (M : B)
S5T5855A
UNIVERSAL 15 MEMORY DIALER
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
Characteristic Supply Voltage Input Voltage Output Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VDD VI VO PD TOPR TSTG Value - 0.3 to 7.0 - 0.2 to VDD + 0.3 - 0.3 to VDD + 0.3 500 - 20 to + 70 - 55 to + 150 Unit V V V mW °C °C
UNIVERSAL 15 MEMORY DIALER
S5T5855A
ELECTRICAL CHARACTERISTICS
Input Voltage
Input Current Column to Row Tone Ratio Row Tone Output Tone Distortion Valid Key Entry Time Pause Time Pulse Interdigit Pause Time Tone interdigit pause time Tone Duration Pulse to tone auto pause time
Make / Break Time
S5T5855A
UNIVERSAL 15 MEMORY DIALER
Characteristic
Symbol
Typ. 17 37 20 30 3.0 100 303 604
Pre-digit Pause Time
tPTPA
- F1 Key Depress
Flash Time
F2 Key Depress F3 Key Depress
APPLICATION INFORMATION KEY DESCRIPTION · · 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 These are Tone / Pulse dialing signal keys in normal mode. T / Pulse Mode : Pulse to Tone Switching Key Tone Mode : Data Key # Pulse Mode : No Operation Tone Mode : Data key EM1, EM2, EM3, EM4 DIRECT REPERTORY DIALING KEY. The cascade 32 digit dialing is available and the exceed 32 digit dialing accepted one by one after all 32 digits is dialed out. In store mode, pressing EM1 to EM4 key will cause the 16 digits of buffer memory storing to corresponding repertory memory. RD / P KEY If press this key first after off- hook, it will operate as a redial key, otherwise it will operate as a pause key. ST : Store This key will accept as store key if press it first key after off or on - hook. The store mode will be released by pressing this key again or hooking once. R / L This key will be allowed recall or location selection in indirect memory operation
UNIVERSAL 15 MEMORY DIALER
S5T5855A
HFI Hands-Free dialing input. Hands-Free dialing output controlled by the keyboard (HFl) HDI Hold function input. Hold function controlled by the keyboard (HDl). The output will control the melody enable.
NOTES : 1. All the key input will be ignored during the redial. 2. if the dialing digits exceed 32 digits, the redialing operation will be inhibited) 3. Cascade dialing (normal dialing after redialing) will be accepted.
S5T5855A
UNIVERSAL 15 MEMORY DIALER
CURRENT STATE HOOK STATE
ON / OFF HOOK ON HOOK OFF HOOK ON HOOK OFF HOOK OFF HOOK OFF HOOK ON HOOK ON HOOK ON HOOK OFF HOOK OFF HOOK ON / OFF HOOK
INPUT
HFI KEY IN HFI KEY IN HFI KEY IN OFF HOOK ON HOOK ON HOOK ON HOOK HDI KEY IN HDI KEY IN HDI KEY IN HDI KEY IN HDI KEY IN HDI KEY IN
NEXT STATE HFO
DIALING
YES NO YES YES MELODY ON NO YES NO MELODY ON YES MELODY ON YES MELODY ON
UNIVERSAL 15 MEMORY DIALER
S5T5855A
TIMING DIAGRAM
PULSE MODE
KEY INPUT 1 2 F RD
tB tPDPA tPMO tFL tPMO tPIDP
Figure 1. TONE MODE
KEY INPUT 1 P 3 RD
tPA tTD
Figure 2.
S5T5855A
UNIVERSAL 15 MEMORY DIALER
PULSE TO TONE DIALING
MDS / DRS
tPTPA
Figure 3. HANDS-FREE DIALING & HOLD FUNCTION
HDI KEY INPUT
HDO KEY INPUT 1 2 5 1
DP HDI KEY INPUT
Figure 4.
UNIVERSAL 15 MEMORY DIALER
S5T5855A
APPLICATION CIRCUIT
TIP RING BRIDGE-D
C1 1mF250V
A1156
T1 1.5 - 3H C5 470 m R11 47K R12 470K R17 330 R18 100K R13 120K Q4 C945 R23 15 D3 D4 R21 150 R22 43 D2 R20 6.2K
R25 5.1K C8 104 R26 10K
620 C9 220 m
R5 R1 R2 R3 R4 HS M / B MODE OCI OCO
HFO C4 C3 C2 C1 DP MUTE TONE GND VDD HOLDO
S1T8504 VL CI CO
VCC RXO RFO
R35 33K R36 330 C33 103 R37 C14 3.3K 0.33 m C22 22m
4 BIAS
C6 104 R14 20K R15 5.1K C7 123 R19 8.2K R16 47K Q5 C945 MEMORY KS531A
RXI CC MIC MIC+ TOF
C10 22m
MFI MUTE VR GND
C16 104 R39 20K
VR 100K
R38 390K
C15 330
R8 6.8K Q3 C1009Y
S5T5855A
R10 100K
MIC C17 1m SW4 R20 104
C2 10mF
PIEZO
S5T5855A
R33 100K
TIP RC AVA OUT S1T2418G01 RING GND SWP OFC
S1T8602B INT1 INT2 OUT VCC
R40 1K R41 560 R42 3K
104 C2
R9 22K
C21 4.7 m
C11331 R34 51K
C18 1000 m
C19 22m
S5T5855A
UNIVERSAL 15 MEMORY DIALER
NOTES