PI74LPT646 Просмотр технического описания (PDF) - Pericom Semiconductor
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PI74LPT646 Datasheet PDF : 6 Pages
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PI74LPT646
PI74LPT652
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PI74LPT646 Switching Characteristics over Operating Range(1)
Parameters
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPLH
tPHL
tSU
tH
tW
Description
Propagation Delay
Bus to Bus
Output Enable Time
G, DIR to Bus
Output Disable Time(3)
G, DIR to Bus
Propagation Delay
Clock to Bus
Propagation Delay
SBA or SAB to Bus
Setup Time HIGH or
LOW, BUS to Clock
Hold Time HIGH or
LOW, Bus to Clock
Clock Pulse Width(3)
HIGH or LOW
Conditions(2)
CL = 50pF
RL = 500Ω
LPT646
Com.
Min.(3) Max.
2.0
7.5
2.0
14.0
2.0
9.0
2.0
9.0
2.0
9.5
4.0
—
2.0
—
6.0
—
LPT646A
Com.
Min.(3) Max.
2.0
6.3
2.0
9.8
2.0
6.3
2.0
6.3
2.0
7.7
2.0
—
1.5
—
5.0
—
LPT646C
Com.
Min.(3) Max.
1.5
5.4
1.5
7.8
1.5
6.3
1.5
5.7
1.5
6.2
2.0
—
1.5
—
5.0
—
Units
ns
ns
ns
ns
ns
ns
ns
ns
PI74LPT652 Switching Characteristics over Operating Range(1)
Parameters
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPLH
tPHL
tSU
tH
tW
Description
Propagation Delay
Bus to Bus
Output Enable Time
GBA, GAB to Bus
Output Disable Time(3)
GBA, GAB to Bus
Propagation Delay
Clock to Bus
Propagation Delay
SBA or SAB to Bus
Setup Time HIGH or
LOW, BUS to Clock
Hold Time HIGH or
LOW, Bus to Clock
Clock Pulse Width(3)
HIGH or LOW
Conditions(2)
CL = 50pF
RL = 500Ω
LPT652
Com.
Min.(3) Max.
2.0
7.5
2.0
14.0
2.0
9.0
2.0
9.0
2.0
9.5
4.0
—
2.0
—
6.0
—
LPT652A
Com.
Min.(3) Max.
2.0
6.3
2.0
9.8
2.0
6.3
2.0
6.3
2.0
7.7
2.0
—
1.5
—
5.0
—
LPT652C
Com.
Min.(3) Max.
1.5
5.4
1.5
7.8
1.5
6.3
1.5
5.7
1.5
6.2
2.0
—
1.5
—
5.0
—
Units
ns
ns
ns
ns
ns
ns
ns
ns
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V, normal range. For Vcc = 2.7V, extended range, all
Propagation Delays and Enable/Disable times should be degraded by 20%.
2. See test circuit and waveforms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
6
PS2064A 01/15/97
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