PI5C3257 Datasheet, PDF (1/3 Pages) Pericom Semiconductor Corporation – Quad 2:1 MUX/DEMUX BusSwitch

PI5C3257
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Quad 2:1 MUX/DEMUX BusSwitch
Product Features:
• Near zero propagation delay
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• Pin compatible with 74 series 257 logic devices
• Packages available:
– 16-pin 150 mil wide plastic QSOP (Q)
– 16-pin 300 mil wide plastic SOIC (S)
– 16-pin 150 mil wide plastic SOIC (W)
– 20-pin 150 mil wide plastic TSSOP (R)
Product Description:
Pericom Semiconductor’s PI5C series of logic circuits are pro-
duced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading performance.
The PI5C3257 is a Quad 2:1 multiplexer/demultiplexer with three-
state outputs that is pinout and function compatible with the
PI74FCT257T, 74F257, and 74ALS/AS/LS257. Inputs can be
connected to outputs with low on resistance (5Ω) with no additional
ground bounce noise or propagation delay.
Logic Block Diagram
IA0
IA1
IB0
IB1
IC0
IC1
ID0
ID1
E
S
YA
YB
YC
YD
Truth Table⁽¹⁾
E S YA YB YC YD
H X Hi-Z Hi-Z Hi-Z Hi-Z
L L IA0 IB0 IC0 ID0
L H IA1 IB1 IC1 ID1
Function
Disable
S=0
S=1
Note: 1. H = High Voltage Level
L = Low Voltage Level
Product Pin Description
Pin Name
IAn-IDn
S
E
YA-YD
GND
VCC
NC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
No Connect
16-Pin Product Configuration
S1
16 VCC
IA0 2
15 E
IA1 3
14 ID0
16-PIN
YA 4
13 ID1
IB0
5
12 YD
IB1 6
11 IC0
YB 7
10 IC1
GND 8
9 YC
20-Pin Product Configuration
NC
S
IA0
IA1
YA
IB0
IB1
YB
GND
NC
1
20 _NC
2
19 _VCC
3
18 _E
4 _20-PIN17 ID0
5 R20 16 ID1
6
15 YD
7
14 IC0
8
13 IC1
9
12 YC
10
11 NC
158
PS7018A 03/13/96