UPD75P238 datasheet(41/50 Pages) NEC

Part #	UPD75P238

Description	4-BIT SINGLE CHIP MICROCOMPUTER

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Manufacturer	NEC [NEC]

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41

µPD75P238

AC PROGRAMMING CHARACTERISTICS (Ta = 25

±5 °C, VDD = 6.0 ±0.25 V, VPP = 12.5 ±0.3 V, VSS = 0 V) (2/2)

PARAMETER

SYMBOL

*1

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

MD1 hold time

2

µs

(from MD0

↑)

tM1H + tM1R

≥ 50

µs

MD1 recovered time

2

µs

(to MD0

↓)

Program counter reset time

tPCR

10

µs

X1 input high and low level

widths

X1 input frequency

fX

4.19

MHz

Initial mode set time

tI

2

µs

MD3 setup time (to MD1

↑)tM3S

2

µs

MD3 hold time

(from MD1

↓)

MD3 setup time (to MD0

↓)tM3SR

When reading program memory

2

µs

Data output delay time from

address*2

Data output hold time from

address*2

MD3 hold time

(from MD0

↑)

Data output float delay time

from MD3

↓

*1.

The corresponding

µPD27C256 symbol.

2.

Internal address signal is incremented by one on the rise of fourth X1 input and is not connected to the

pin.

tM1H

tOEH

tM1R

tOR

tXH, tXL

0.125

µs

tM3H

2

µs

tHAD

tOH

When reading program memory

0

130

ns

tDAD

tACC

When reading program memory

2

µs

tM3HR

When reading program memory

2

µs

tDFR

When reading program memory

2

µs

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UPD75P238 Datasheet(PDF) 41 Page - NEC

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