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SN74CB3Q3251RGYR 数据表(PDF) 1 Page - Texas Instruments

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部件名 SN74CB3Q3251RGYR
功能描述  1-OF-8 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE, HIGH-BANDWIDTH BUS SWITCH
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

SN74CB3Q3251RGYR 数据表(HTML) 1 Page - Texas Instruments

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FEATURES
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
B4
B3
B2
B1
A
NC
OE
GND
VCC
B5
B6
B7
B8
S0
S1
S2
DBQ, DGV, OR PW PACKAGE
(TOP VIEW)
NC - No internal connection
RGY PACKAGE
(TOP VIEW)
1
16
8
9
2
3
4
5
6
7
15
14
13
12
11
10
B5
B6
B7
B8
S0
S1
B3
B2
B1
A
NC
OE
NC - No internal connection
DESCRIPTION/ORDERING INFORMATION
SN74CB3Q3251
1-OF-8 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS173A – AUGUST 2004 – REVISED MARCH 2005
Data and Control Inputs Provide Undershoot
Clamp Diodes
High-Bandwidth Data Path (up to 500 MHz (1))
Low Power Consumption (I
CC = 1 mA Typ)
Equivalent to IDTQS3VH251 Device
V
CC Operating Range From 2.3 V to 3.6 V
5-V Tolerant I/Os With Device Powered Up or
Powered Down
Data I/Os Support 0- to 5-V Signaling Levels
(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
Low and Flat ON-State Resistance (r
on)
Characteristics Over Operating Range
Control Inputs Can Be Driven by TTL or
(r
on = 4 Ω Typ)
5-V/3.3-V CMOS Outputs
Rail-to-Rail Switching on Data I/O Ports
I
off Supports Partial-Power-Down Mode
Operation
– 0- to 5-V Switching With 3.3-V V
CC
Latch-Up Performance Exceeds 100 mA Per
– 0- to 3.3-V Switching With 2.5-V V
CC
JESD 78, Class II
Bidirectional Data Flow With Near-Zero
ESD Performance Tested Per JESD 22
Propagation Delay
– 2000-V Human-Body Model (A114-B,
Low Input/Output Capacitance Minimizes
Class II)
Loading and Signal Distortion
(C
io(OFF) = 3.5 pF Typ)
– 1000-V Charged-Device Model (C101)
Fast Switching Frequency
Supports Both Digital and Analog
(f
OE or fS = 20 MHz Max)
Applications: PCI Interface, Differential Signal
Interface, Memory Interleaving, Bus Isolation,
(1)
For additional information regarding the performance
characteristics of the CB3Q family, refer to the TI application
Low-Distortion Signal Gating
report, CBT-C, CB3T, and CB3Q Signal-Switch Families,
literature number SCDA008.
The SN74CB3Q3251 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of
the pass transistor, providing a low and flat ON-state resistance (ron). The low and flat ON-state resistance allows
for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device
also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.
Specifically designed to support high-bandwidth applications, the SN74CB3Q3251 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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