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SN74CB3Q3257PWG4 数据表(PDF) 9 Page - Texas Instruments

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部件名 SN74CB3Q3257PWG4
功能描述  FET Multiplexer/Demultiplexer
Download  25 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

SN74CB3Q3257PWG4 数据表(HTML) 9 Page - Texas Instruments

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1B1
1A
OE
1B2
SW
SW
2B1
2A
2B2
SW
SW
3B1
3A
3B2
SW
SW
4B1
4A
4B2
SW
SW
S
4
7
9
12
1
15
2
3
5
6
11
10
14
13
SN74CB3Q3257
www.ti.com
SCDS135B – SEPTEMBER 2003 – REVISED JUNE 2015
8.2 Functional Block Diagram
8.3 Feature Description
The SN74CB3Q3257 device has a high-bandwidth data path (up to 500 MHz) and has 5-V tolerant I/Os with the
device powered up or powered down. It also has low and flat ON-state resistance (ron) characteristics over
operating range (ron = 4 Ω Typical).
This device also has rail-to-rail switching on data I/O ports for 0- to 5-V switching with 3.3-V VCCand 0- to 3.3-V
switching with 2.5-V VCCas well as bidirectional data flow with near-zero propagation delay and low input/output
capacitance that minimizes loading and signal distortion (Cio(OFF) = 3.5 pF Typical).
The SN74CB3Q3257 also provides a fast switching frequency (fOE = 20 MHz Max) with data and control inputs
that provide undershoot clamp diodes as well as low power consumption (ICC = 0.6 mA Typical).
The VCC operating range is from 2.3 V to 3.6 V and the data I/Os support 0- to 5-V signal levels of (0.8-V, 1.2-V,
1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V).
The control inputs can be driven by TTL or 5-V / 3.3-V CMOS outputs as well as Ioff Supports Partial-Power-
Down Mode Operation.
8.4 Device Functional Modes
Table 1 lists the functional modes of the SN74CB3Q3257.
Table 1. Function Table
INPUTS
INPUT/OUTPUT
FUNCTION
A
OE
S
L
L
B1
A port = B1 port
L
H
B2
A port = B2 port
H
X
Z
Disconnect
Copyright © 2003–2015, Texas Instruments Incorporated
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