PI74FCT191T Просмотр технического описания (PDF) - Pericom Semiconductor

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PI74FCT191T

High Speed CMOS Presettable Synchronous 4-Bit Binary Counters

Pericom Semiconductor 

PI74FCT191T

(25Ω SERIES) PI74FCT2191T

4-BIT BINARY COUNTERS 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122

Timing Characteristics (Over Operating Range)

Symbol

tDPLS

Description

Di to PL Setup

191T

191AT

191CT

2191T

2191AT

2191CT

Conditions Min.

Max. Min.

Max. Min.

Max. Unit

5.0

4.0

4.0

tDPLH Di to PL Hold

1.5

1.5

1.5

tCS

CE to CP Setup

10

9.0

9.0

tCH

CE to CP HoId

0

0

0

tUDCPS U/D to CP Setup

CL = 50 pF

12

RL = 500Ω

10

10

ns

tUDCPH U/D to CP Hold

0

0

0

tCPW

tPL

Clock Pulse(1)

Width HIGH or LOW

PL LOW

5.0

4.0

4.0

6.0

5.5

5.5

tPLCPR PL to CP Recovery

6.0

5.0

5.0

Notes:

1.See Test Circuit and Waveforms.

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

3. This parameter guaranteed but not production tested.

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

6

PS2084B 01/13/97

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