PI5C32245 Datasheet, PDF (1/3 Pages) Pericom Semiconductor Corporation – 8-Bit, 2-Port Bus Switch with 25W Series Resistor

PI5C32245
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8-Bit, 2-Port Bus Switch
with 25Ω Series Resistor
Product Features:
• Near zero propagation delay
• 25Ω series resistor termination
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2 µA Typical)
– Ideally suited for notebook applications
• Pin compatible with 74 series 245 logic devices
• Packages available:
– 20-pin 150 mil wide plastic QSOP (Q)
Product Description:
Pericom Semiconductor’s PI5C series of logic circuits are
produced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading performance.
The PI5C32245 is a 8-bit, 2-port bus switch designed with a low
ON resistance (5Ω) allowing inputs to be connected directly to
outputs. The bus switch creates no additional propagational delay
or additional ground bounce noise. The switches are turned ON by
the Bus Enable (BE) input signal. Pinout is compatible with
PI74FCT245T (Octal Bidirectional Transceiver). The device has a
built-in 25Ω resistor to reduce noise resulting from reflections, thus
eliminating the need for an external terminating resistor.
Logic Block Diagram
Product Pin Configuration
A0
B0
NC 1
20 VCC
A0 2
19 BE
A1 3
18 B0
A2 4 ^20-PIN17 B1
A7
B7
A3 5 ^Q 16 B2
A4 6
15 B3
A5 7
14 B4
A6 8
13 B5
A7 9
12 B6
GND 10
11 B7
BE
Truth Table⁽¹⁾
Function
BE A0–7
Disconnect
H Hi-Z
Connect
L B0–7
Note:
1. H =
L=
Hi-Z =
High Voltage Level
Low Voltage Level
High Impedance
Product Pin Description
Pin Name
BE
A0–7
B0–7
GND
VCC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
149
PS8136 08/20/97