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SN74LVC2952A Datasheet(PDF) 1 Page - Texas Instruments

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Part No. SN74LVC2952A
Description  OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74LVC2952A Datasheet(HTML) 1 Page - Texas Instruments

 
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FEATURES
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B8
B7
B6
B5
B4
B3
B2
B1
OEAB
CLKAB
CLKENAB
GND
VCC
A8
A7
A6
A5
A4
A3
A2
A1
OEBA
CLKBA
CLKENBA
DB, DW, NS, OR PW PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
SN74LVC2952A
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCAS311I – JANUARY 1993 – REVISED MARCH 2005
Operates From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 8.2 ns at 3.3 V
Typical VOLP (Output Ground Bounce)
<0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot)
>2 V at VCC = 3.3 V, TA = 25°C
Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With
3.3-V VCC)
Ioff Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 1000-V Charged-Device Model (C101)
This octal bus transceiver and register is designed for 1.65-V to 3.6-V VCC operation.
The SN74LVC2952A consists of two 8-bit back-to-back registers that store data flowing in both directions
between two bidirectional buses. Data on the A or B bus is stored in the registers on the low-to-high transition of
the clock (CLKAB or CLKBA) input, provided that the clock-enable (CLKENAB or CLKENBA) input is low. Taking
the output-enable (OEAB or OEBA) input low accesses the data on either port.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
Tube of 25
SN74LVC2952ADW
SOIC – DW
LVC2952A
Reel of 2000
SN74LVC2952ADWR
SOP – NS
Reel of 2000
SN74LVC2952ANSR
LVC2952A
–40
°C to 85°C
SSOP – DB
Reel of 2000
SN74LVC2952ADBR
LE952A
Tube of 60
SN74LVC2952APW
TSSOP – PW
Reel of 2000
SN74LVC2952APWR
LE952A
Reel of 250
SN74LVC2952APWT
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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 © 1993–2005, 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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