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SN74CBT6845CPWR Datasheet(PDF) 1 Page - Texas Instruments

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Part # SN74CBT6845CPWR
Description  8-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS 5-V BUS SWITCH WITH -2-V UNDERSHOOT PROTECTION
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN74CBT6845CPWR Datasheet(HTML) 1 Page - Texas Instruments

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SN74CBT6845C
8BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS
5V BUS SWITCH WITH 2V UNDERSHOOT PROTECTION
SCDS140 − OCTOBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Undershoot Protection for Off-Isolation on
A and B Ports Up To −2 V
D B-Port Outputs Are Precharged by Bias
Voltage (BIASV) to Minimize Signal
Distortion During Live Insertion and
Hot-Plugging
D Supports PCI Hot Plug
D Bidirectional Data Flow, With Near-Zero
Propagation Delay
D Low ON-State Resistance (ron)
Characteristics (ron = 3 Ω Typical)
D Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(Cio(OFF) = 5.5 pF Typical)
D Data and Control Inputs Provide
Undershoot Clamp Diodes
D Low Power Consumption
(ICC = 3 µA Max)
D VCC Operating Range From 4 V to 5.5 V
D 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)
D Control Inputs Can be Driven by TTL or
5-V/3.3-V CMOS Outputs
D Ioff Supports Partial-Power-Down Mode
Operation
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model
(A114-B, Class II)
− 1000-V Charged-Device Model (C101)
D Supports Both Digital and Analog
Applications: PCI Interface, Memory
Interleaving, Bus Isolation, Low-Distortion
Signal Gating
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
BIASV
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
OE
B1
B2
B3
B4
B5
B6
B7
B8
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
RGY PACKAGE
(TOP VIEW)
120
10
11
2
3
4
5
6
7
8
9
19
18
17
16
15
14
13
12
OE
B1
B2
B3
B4
B5
B6
B7
A1
A2
A3
A4
A5
A6
A7
A8
description/ordering information
The SN74CBT6845C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron),
allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the
SN74CBT6845C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring
that the switch remains in the proper OFF state. The device also precharges the B port to a user-selectable bias
voltage (BIASV) to minimize live-insertion noise.
Copyright
 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.


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