5

12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

PI74FCT821T/823T/825T

(25

Ω

Ω

Ω

Ω

Ω Series) P174FCT2821T/2823T

BUS INTERFACE REGISTERS

PS2023A 03/11/96

PI74FCT821/2821T Switching Characteristics over Operating Range

821AT/2821AT

821BT/2821BT

821CT/2821CT

Com.

Com.

Com.

Parameters

Description

Min

Max

Min

Max

Min

Max

Unit

Propagation Delay

1.5

10.0

1.5

7.5

1.5

6.0

ns

Ω

(OE = LOW)

1.5

20.0

1.5

15.0

1.5

12.5

ns

Ω

Setup Time HIGH or

4.0

—

3.0

—

3.0

—

ns

Ω

Hold Time HIGH or

2.0

—

1.5

—

1.5

—

ns

Setup Time HIGH or

4.0

—

3.0

—

3.0

—

ns

LOW, EN to CP

Hold Time HIGH or

2.0

—

0

—

0

—

ns

LOW, EN to CP

Propagation Delay,

1.5

14.0

1.5

9.0

1.5

8.0

ns

6.0

—

6.0

—

6.0

—

ns

CLR to CP

7.0

—

5.0

—

6.0

—

ns

HIGH or LOW

6.0

—

6.0

—

6.0

—

ns

LOW

Output Enable Time

1.5

11.5

1.5

8.0

1.5

7.0

ns

Ω

1.5

23.0

1.5

15.0

1.5

12.5

ns

Ω

1.5

7.0

1.5

6.5

1.5

6.2

ns

Ω

1.5

8.0

1.5

7.5

1.5

6.5

ns

Ω

Notes:

1. See test circuit and wave forms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

3. This parameter is guaranteed but not production tested.