SN74ALVC16721 3.3-V 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS

SCAS267A - MARCH 1993 - REVISED MAY 1995

features

Member of the Texas Instruments Widebus^TM Family
EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per JEDEC Standard JESD-17
Bus Hold On Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages

EPIC and Widebus are trademarks of Texas Instruments Incorporated.

description

This 20-bit flip-flop is designed specifically for low-voltage(3.3-V) V_CC operation; it is tested at 2.5-V, 2.7-V, and3.3-V V_CC.

The SN74ALVC16721's 20 flip-flops are edge-triggered D-typeflip-flops with qualified clock storage. On the positive transitionof the clock (CLK) input, the device provides true data at the Qoutputs if the clock-enable () input is low. If is high, no data is stored.

A buffered output-enable () input places the 20 outputs in either a normal logicstate (high or low level) or a high-impedance state. In thehigh-impedance state, the outputs neither load nor drive the buslines significantly. The high-impedance state and increased driveprovide the capability to drive bus lines without interface or pullupcomponents. does notaffect the internal operation of the flip-flops. Old data can beretained or new data can be entered while the outputs are in thehigh-impedance state.

Active bus-hold circuitry holds unused or floating data inputs ata valid logic level.

The SN74ALVC16721 is available in TI's shrink small-outline (DL)and thin shrink small-outline (DGG) packages, which provide twice theI/O pin count and functionality of standard small-outline packages inthe same printed-circuit-board area.

The SN74ALVC16721 is characterized for operation from -40°Cto 85°C.

Title: 3.3-V 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
Product Family: D-TYPE (3-STATE) FLIP-FLOPS
Device Functionality: 20-BIT
Orderable Devices: SN74ALVC16721DGGR, SN74ALVC16721DL, SN74ALVC16721DLR

View the complete PDF datasheet: scas267a.pdf (117 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74ALVC16721

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