PI3B3251 Datasheet, PDF (1/3 Pages) Pericom Semiconductor Corporation – 3.3V 8:1 MUX /DEMUX BUS SWITCH

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3.3V, 8:1 Mux/Demux BusSwitch
Product Features
• Near zero propagation delay
• 5 Ohm switches connect inputs to outputs
• Ultra Low Quiescent Power (0.1µA Typical)
– Ideally suited for notebook applications
• Pin compatible with 74 series 251 logic devices
• Packages available:
– 16-pin 150 mil wide plastic QSOP (Q)
– 16-pin 150 mil wide plastic SOIC (W)
– 16-pin 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductor’s PI3B series of logic circuits are produced
using the Company’s advanced sub micron CMOS technology,
achieving industry leading performance.
The PI3B3251 is a 3.3V Dual 8:1 Multiplexer/demultiplexer with three-
state outputs that is pinout compatible with the PI74FCT251T,
74F251, and 74ALS/AS/LS 251. Inputs can be connected to outputs
with low on resistance (5 Ohm) with no additional ground bounce
noise or propagation delay.
Logic Block Diagram
Product Pin Configuration
I0 I1 I2 I3 I4 I5 I6 I7
I3 1
16 VCC
I2 2
15 I4
I1
3
16-Pin
Q, W, L
14
I5
E
I0 4
13 I6
S0
Y5
12 I7
NC 6
11 S0
S1
E7
10 S1
GND 8
9 S2
S2
Truth Table⁽¹⁾
Select
E S2 S1 S0
Y
HXXX
Hi-Z
LLLL
I0
LLLH
I1
LLHL
I2
L LHH
I3
LHLL
I4
LHLH
I5
LHHL
I6
LHHH
I7
Y
Function
Disable
S2-0 = 0
S2-0 = 1
S2-0 = 2
S2-0 = 3
S2-0 = 4
S2-0 = 5
S2-0 = 6
S2-0 = 7
Product Pin Description
Pin Name
I0–7
S0–2
E
Y
GND
VCC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
PS8150D
05/15/01