Icom IC-R7O Maintenance Manual page 60

TC4518 (DUAL BCD UP COUNTER)
TC40193BP (SYNCHRONOUS 4-BiT BINARY UP/DOWN COUNTER)
PIN CONNECTIONS
CLOCK 1 Vpp Dez 1 Vpp
CE 2 CLEAR Qe 2 Dpi
Qo 3 Ou Qs Q 3 a CLEAR
O 1
Qa 4g] 2 Qe CLOCK DOWN 4q] & BORROW
Qe 5 ar Q CLOCK UP 5 g CARRY
Qa 6g © Qo a 6g 2 PE
CLEAR 7 CE Or 7 Dp3
Vss 8 CLOCK Vss 8 Dp4
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Rating
Power supply voltage Vss —0.5 ~ Vsg +20
Input voltage Vss —0.5 ~ Vpp + 0.5
Output voltage Vss —0.5 ~ Vpp +0.5
Input current +10
Allowable loss
Storage temperature —65 ~ 150 i
Lead temperature/time 260°C/10 sec.
TC-9123P (FM/AM SYNTHESIZER TUNER PLL)
PIN CONNECTION BLOCK DIAGRAM
Voo GND Rout Pout
O O O
I
db = Reference Frequency Osc. .
Divider i
Programmable Counter
ese : a
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Item
Power supply voltage -0.2~+ 39.0
Input voltage —0.3 ~ Vpp + 0.3
Operation temperature —30 ~ +70
Storage temperature —55 ~ +125