N74F225N View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

N74F225N

16X5 asynchronous FIFO (3-State)

Philips Electronics 

Philips Semiconductors

16 × 5 asynchronous FIFO (3-State)

Product specification

74F225

AC WAVEFORMS

tw(L)

CP

VM

VM

VM

VM

tw(H)

th

tsu

Dn

VM VM

VM

tsu

tw(L)

MR

VM

VM

SF00339

Waveform 1. MR and Clock Pulse Widths, Data Setup and

Hold Times and MR to Clock Setup Time

UNCPIN

Qn

tw(L)

VM

1/fMAX

VM

VM

tw(H)

tPLH

VM

VM

tPHL

VM

tPHL

tPLH

OR VM

IR

VM

tPLH

VM

Waveform 2. UNCPIN to Output Delays

SF00340

CPA

or

CPB

UNCPOUT

OR

VM

tPHL

1/fMAX

tw(L)

VM

VM

tPLH

VM

tSK

VM

tPLH

VM

Qn

VM

SF00342

Waveform 4. CPA or CPB to UNCPOUT and OR Delay,

UNCPOUT Pulse Width and Qn to OR Skew

OE

VM

VM

tPZH

tPHZ

VOH -0.3V

Qn

VM

0V

SF00343

Waveform 5. 3-State Output Enable Time to High Level and

Output Disable Time from High Level

1/fMAX

CPA

or

CPB

VM

VM

MR

tPHL

VM

tPLH

IR

VM

VM

tPHL

OE

VM

VM

tPZL

tPLZ

Qn

VM

VOL +0.3V

SF00344

Waveform 6. 3-State Output Enable Time to Low Level and

Output Disable Time from Low Level

OR

VM

SF00341

Waveform 3. CPA or CPB to IR Delay and MR to IR

and OR Delay

NOTES:

1. For all waveforms, VM = 1.5V.

2. The shaded areas indicate when the input is permitted to change for predictable output performance.

June 15, 1992

9

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