PI74FCT3573 Datasheet, PDF (1/4 Pages) Pericom Semiconductor Corporation – Fast CMOS 3.3V 8-Bit Transparent Latch

PI74FCT3573
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Fast CMOS 3.3V 8-Bit
Transparent Latch
Features
Description
• Advanced Low Power CMOS Operation
• Compatible with LVC class of products
• Compatible with industry standard octal pinouts
• Excellent output drive capability:
Balanced drives (24 mA sink and source)
• Can serve as a 5V to 3V translator
• Inputs can be driven by 3.3V or 5V devices
• Low ground bounce outputs
Pericom Semiconductor’s PI74FCT3 series of logic circuits are
produced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT3573 is an 8-bit transparent latch designed with
3-state outputs and is intended for bus oriented applications. When
Latch Enable (LE) is HIGH, the flip-flops appear transparent to
the data. The data that meets the set-up time when LE is LOW is
latched. When OE is HIGH, the bus output is in the high impedance
state.
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L20)
– 20-pin 150 mil wide plastic QSOP (Q20)
– 20-pin 150 mil wide plastic TQSOP (R20)
– 20-pin 300 mil wide plastic SOIC (S20)
The PI74FCT3573 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
Logic Block Diagram
Pinout
OE
LE
D0
D
O
G
TO 7 OTHER CHANNELS
Truth Table
Inputs⁽¹⁾
DN
LE
OE
H
H
L
L
H
L
X
X
H
Note:
1. H = High Voltage Level
X = Don’t Care
L = Low Voltage Level
Z = High Impedance
OE 1
20 Vcc
D0 2
19 O0
D1 3
18 O1
D2 4 ^{20-Pin 17 O2}
D3 5
L20 _{16 O3}
R20
O0
D4 6 _Q20 ^{15 O4}
D5 7 _S20 ^{14 O5}
D6 8
13 O6
D7 9
12 O7
GND 10
11 LE
Outputs⁽¹⁾
ON
H
L
Z
Pin Description
Pin Name
OE
LE
D7-D0
O7-O0
GND
VCC
Description
Output Enable Input (Active LOW)
Latch Enable Input (Active HIGH)
Data Inputs
3-State Outputs
Ground
Power
1
PS8121A 07/21/97