UPD78C12AL datasheet(39/66 Pages) NEC

39 / 66 page

µPD78C10A,78C11A,78C12A

AC CHARACTERISTICS (TA = –40 to +85

°C, VDD = AVDD = +5.0 V ±10 %, VSS = AVSS = 0 V)

Read/write Operation:

fXX = 15 MHz, CL = 100 pF

RD low level width

tRR

fXX = 15 MHz

fXX = 15 MHz, CL = 100 pF

PARAMETER

SYMBOL

TEST CONDITIONS

MIN.

MAX.

UNIT

X1 input cycle time

tCYC

250

Address setup time (to ALE

↓ )tAL

Address hold time (from ALE

↓ )tLA

fXX = 15 MHz, CL = 100 pF

↓ delay time from address

tAR

100

Address float time from RD

↓

tAFR

CL = 100 pF

Data input time from address

tAD

250

Data input time from ALE

↓

tLDR

135

Data input time from RD

↓

tRD

120

↓ delay time from ALE ↓

tLR

Data hold time (from RD

↑ )tRDH

CL = 100 pF

ALE

↑ delay time from RD ↑

tRL

fXX = 15 MHz, CL = 100 pF

In Data Read

215

fXX = 15 MHz, CL = 100 pF

In OP Code Fetch

415

fXX = 15 MHz, CL = 100 pF

ALE high level width

tLL

fXX = 15 MHz, CL = 100 pF

M1 setup time (to ALE

↓ )tML

M1 hold time (from ALE

↓ )tLM

IO/M setup time (to ALE

↓ )tIL

IO/M hold time (from ALE

↓ )tLI

tAW

100

Data output time from ALE

↓

tLDW

180

Data output time from WR

↓

tWD

CL = 100 pF

100

↓ delay time from ALE ↓

tLW

Data setup time (to WR

↑ )tDW

165

Data hold time (from WR

↑ )tWDH

fXX = 15 MHz, CL = 100 pF

ALE

↑ delay time from WR ↑

tWL

WR low level width

tWW

215

↓ delay time from address

UPD78C12AL Datasheet(PDF) 39 Page - NEC

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