PI5C16245AX Datasheet, PDF (1/6 Pages) Pericom Semiconductor Corporation – 16-Bit, 2-Port Bus Switch

PI5C16245
PI5C162245 (25-Ohm)
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16-Bit, 2-Port Bus Switch
Features:
• Near-Zero propagation delay
• 5-ohm 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 series16245
• Industrial operating temperature: –40°C to +85°C
• Packages (Pb-free & Green available):
– 48-pin 240-mil wide thin plastic TSSOP (A)
– 48-pin 150-mil wide plastic BQSOP (B)
– 48-pin 300-mil wide plastic SSOP (V)
Block Diagram
Description:
Pericom Semiconductor’s PI5C16245 and PI5C162245 are 16-bit, 2-
port bus switches that are pin compatible with the 74 series 16245 16-
bit transceiver. Two enable signals (nBE) turn the switches on similar
to the enable signals of the 16245. The bus switch creates no
additional propagation delay or additional ground bounce noise.
The PI5C162245 device has a built-in 25-ohm series resistor to reduce
noise due to reflections, thus eliminating the need for an external
terminating resistor.
Pin Configuration
1A0
1A7
1BE
2A0
2A7
2BE
Truth Table⁽¹⁾
Function
nBE nA0–7
Disconnect
H Hi-Z
Connect
L nB0–7
Note: 1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
1B0
1B7
2B0
2B7
NC 1
1B0 2
1B1 3
GND 4
1B2 5
1B3 6
VCC 7
1B4 8
1B5 9
GND 10
1B6 11
1B7 12
2B0 13
2B1 14
GND 15
2B2 16
2B3 17
VCC 18
2B4 19
2B5 20
GND 21
2B6 22
2B7 23
NC 24
48 1BE
47 1A0
46 1A1
45 GND
44 1A2
43 1A3
42 VCC
41 1A4
40 1A5
39 GND
38 1A6
37 1A7
36 2A0
35 2A1
34 GND
33 2A2
32 2A3
31 VCC
30 2A4
29 2A5
28 GND
27 2A6
26 2A7
25 2BE
Pin Description
Pin Name I/O
nBE
I
nA0-nA7 I/O
nB0-nB7
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
1
PS7025D 01/24/06