UPD4704C Просмотр технического описания (PDF) - NEC => Renesas Technology

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производитель

UPD4704C

EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS

NEC => Renesas Technology 

AC Timings

UP/DOWN

Fig. 1 Up/Down Signal Input Timing

tCYCT

tPWUDL

tPWUDH

tSUDM

tCYCT

tPWUDL

tPWUDH

µPD4704

Fig. 2 Count Data Output Timing

tPWRS tSRSUD

RESET

UP/DOWN

CD0–CD7

OE

tDRSCD

Hi-Z

tDOECD

tSUDSTB1

STB

tDUDCD

tDSTBCD

tDSTBCD

Hi-Z

tFOECD

UP/DOWN

Fig. 3 Carry/Borrow Signal Output Timing

tDUDCB1

tDUDCB2

Carry

tPWCB

Borrow

UP/DOWN

Fig. 4 Strobe Signal Output Timing

tSUDSTB1

tSUDSTB2

tDUDCB1

tPWCB

tDUDCB2

STB

8

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