74F189A datasheet(6/10 Pages) PHILIPS

Part #	74F189A

Description	64-bit TTL bipolar RAM, inverting 3-State

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Philips Semiconductors

Product specification

74F189A

64-bit TTL bipolar RAM, inverting (3-State)

1990 Feb 23

6

VM

Qn

CE

tPZH

tPZL

NOTE:

For all waveforms, VM = 1.5V.

SF00304

Waveform 2. Read cycle, chip enable access time

VM

Qn

CE

tPHZ

tPLZ

NOTE:

For all waveforms, VM = 1.5V.

SF00305

Waveform 3. Read cycle, chip disable time

AC WAVEFORMS FOR WRITE CYCLE

VM

An

tsu (H or L)

tPZH

VM

Qn

tPHZ

tPLZ

VM

Dn

VM

CE

VM

WE

th (H or L)

VM

th (H or L)

tsu ( L)

tsu (H or L)

th ( L)

tw ( L)

VM

Hi–Z

tPZL

NOTE:

For all waveforms, VM = 1.5V.

SF00306

Waveform 4. Write cycle

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