Texas Instruments CD74AC238 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER datasheet manual

查询CD74AC238M96供应商 CD74AC238

3-LINE TO 8-LINE DECODER/DEMULTIPLEXER

SCHS331 – FEBRUARY 2003

AC Types Feature 1.5-V to 5.5-V Operation M PACKAGE (TOP VIEW)

and Balanced Noise Immunity at 30% of the Supply Voltage

Speed of Bipolar F, AS, and S, With

Significantly Reduced Power Consumption

Designed Specifically for High-Speed

Memory Decoders and Data-Transmission

Systems

Incorporates Three Enable Inputs to

Simplify Cascading and/or Data Reception

GND Y6

Balanced Propagation Delays ±24-m A Output Drive Current – Fanout to 15 F Devices SCR-Latchup-Resistant CMOS Process and Circuit Design Exceeds 2-k V ESD Protection Per MIL-STD-883, Method 3015

description/ordering information The CD74AC238 decoder/demultiplexer is designed for high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of this decoder and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications (see Application Information).

ORDERING INFORMATION

ORDERABLE TOP-SIDE

TA PACKAGE†

PART NUMBER MARKING

–55°C to 125°C SOIC – M Tape and reel CD74AC238M96 AC238M 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.

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.

1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265