SN74ALVCH16952
16-BIT REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS
www.ti.com
SCES011E–JULY 1995–REVISED SEPTEMBER 2004
FEATURES
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
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Member of the Texas Instruments Widebus™
Family
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EPIC™ (Enhanced-Performance Implanted
CMOS) Submicron Process
1OEAB
1CLKAB
1CLKENAB
GND
1OEBA
1CLKBA
1CLKENBA
GND
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ESD Protection Exceeds 2000 V Per
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MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
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1A1
1B1
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1A2
1B2
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Latch-Up Performance Exceeds 500 mA Per
JESD 17
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V
CC
V
CC
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1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
1B3
1B4
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
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Package Options Include Plastic 300-mil
Shrink Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
Small-Outline (DGV) Packages
DESCRIPTION
This 16-bit registered transceiver is designed for
1.65-V to 3.6-V VCC operation.
The SN74ALVCH16952 contains two sets of D-type
flip-flops for temporary storage of data flowing in
either direction. This device can be used as two 8-bit
transceivers or one 16-bit transceiver. 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.
V
CC
V
CC
2A7
2A8
2B7
2B8
GND
GND
2CLKENAB
2CLKAB
2OEAB
2CLKENBA
2CLKBA
2OEBA
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.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH16952 is characterized for operation from -40°C to 85°C.
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.
Widebus, EPIC are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 1995–2004, 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.