sm5128a1s Nippon Precision Circuits Inc, (NPC), sm5128a1s Datasheet - Page 2

• Manufacturer Part Number: sm5128a1s
• Description: Cb Transceiver System Lsi
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

BLOCK DIAGRAM
PIN DESCRIPTION
Number
COMC
2 to 7
COMB
COMA
XOUT
10
11
12
13
14
15
16
17
18
19
20
21
1
8
9
XIN
FIN
S1
S2
S3
S4
S5
S6
LB
HL
S1 to S6
COMC
XOUT
Name
TEST
VDD
CHO
VSS
XIN
FIN
DO
AO
HL
LD
LB
PA
AI
DRIVER
LCD
COM
LCD
LCD common drive signal output
LCD segment drive signal output
“HIGH POWER”/”LOW POWER” display indicator control input. “HIGH POWER” indicator when HIGH, and “LOW
POWER” indicator when LOW or open. Pull-down resistor built-in.
“LOW BATTERY” display indicator input. “LOW BATTERY” indicator when LOW or open. Pull-down resistor built-in.
PA input. PA mode when HIGH. Pull-down resistor built-in.
Test input. Tie LOW or open for normal operation.
Crystal oscillator circuit input and output
Ground
Programmable counter input. Feedback resistor built-in.
4.5 to 5.5 V supply voltage
Phase detector output. Three-state output pin.
Inverter input and output. AI is HIGH in standby mode.
Unlock signal output. Unlocked when LOW, and locked when HIGH.
Channel-change confirmation tone output. Active-HIGH pulse of approximately 50 ms duration.
DISCONTINUED
SW2
PROGRAMMABLE
UP/DN COUNTER
PRODUCT
CHANNEL ROM
MULTI PLEXER
LCD DRIVING
SIGNAL
GENERATOR
DIVIDER
SM5128A1
SW1
REFERENCE
DIVIDER
Description
NIPPON PRECISION CIRCUITS—2
PHASE DETECTOR
CONTROLLER
LD CONTROLLER
AMP
VDD
VSS
TEST
CE
PA
UP
DN
EMG
TR
CHO
LD
AI
AO
DO