SN74LVC2952A Datasheet, PDF (1/14 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

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FEATURES
• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 8.2 ns at 3.3 V
• Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot)
>2 V at V_CC = 3.3 V, T_A = 25°C
• Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With
3.3-V V_CC)
• I_off 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)
SN74LVC2952A
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCAS311I – JANUARY 1993 – REVISED MARCH 2005
DB, DW, NS, OR PW PACKAGE
(TOP VIEW)
B8 1
B7 2
B6 3
B5 4
B4 5
B3 6
B2 7
B1 8
OEAB 9
CLKAB 10
CLKENAB 11
GND 12
24 V_CC
23 A8
22 A7
21 A6
20 A5
19 A4
18 A3
17 A2
16 A1
15 OEBA
14 CLKBA
13 CLKENBA
DESCRIPTION/ORDERING INFORMATION
This octal bus transceiver and register is designed for 1.65-V to 3.6-V V_CC 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 V_CC 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 I_off. The I_off circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
T_A
–40°C to 85°C
SOIC – DW
SOP – NS
SSOP – DB
TSSOP – PW
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
Tube of 25
SN74LVC2952ADW
Reel of 2000
SN74LVC2952ADWR
Reel of 2000
SN74LVC2952ANSR
Reel of 2000
SN74LVC2952ADBR
Tube of 60
SN74LVC2952APW
Reel of 2000
SN74LVC2952APWR
Reel of 250
SN74LVC2952APWT
TOP-SIDE MARKING
LVC2952A
LVC2952A
LE952A
LE952A
(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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1993–2005, Texas Instruments Incorporated