Texas Instruments SN54165, SN54LS165A, SN74165, SN74LS165A Data Sheet Manual

查询5962-7700601VEA供应商 SN54165, SN54LS165A, SN74165, SN74LS165A

PARALLEL-LOAD 8-BIT SHIFT REGISTERS

The SN54165 and SN74165 devices are obsolete and are no longer supplied.

SDLS062D – OCTOBER 1976 – REVISED FEBRUARY 2002

Complementary Outputs SN54165, SN54LS165A J OR W PACKAGE

SN74165 N PACKAGE

Direct Overriding Load (Data) Inputs

SN74LS165A D, N, OR NS PACKAGE

Gated Clock Inputs (TOP VIEW)

Parallel-to-Serial Data Conversion

SH/LD VCC

TYPICAL MAXIMUM TYPICAL CLK CLK INH

CLOCK FREQUENCY POWER DISSIPATION

’165 26 MHz 210 m W ’LS165A 35 MHz 90 m W

description

QH SER

GND QH

The ’165 and ’LS165A are 8-bit serial shift registers that shift the data in the direction of QA toward QH when clocked. Parallel-in access to

SN54LS165A FK PACKAGE

each stage is made available by eight individual,

(TOP VIEW)

direct data inputs that are enabled by a low level at the shift/load (SH/LD) input. These registers also feature gated clock (CLK) inputs and complementary outputs from the eighth bit. All inputs are diode-clamped to minimize transmission-line effects, thereby simplifying system design.

NC NC

Clocking is accomplished through a two-input positive-NOR gate, permitting one input to be used as a clock-inhibit function. Holding either of the clock inputs high inhibits clocking, and holding either clock input low with SH/LD high enables the other clock input. Clock inhibit (CLK INH) should

be changed to the high level only while CLK is NC – No internal connection

high. Parallel loading is inhibited as long as SH/LD is high. Data at the parallel inputs are loaded directly into the register while SH/LD is low,

LK IN

independently of the levels of CLK, CLK INH, or serial (SER) inputs.

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  2002, Texas Instruments Incorporated

Products conform to specifications per the terms of Texas Instruments On products compliant to MIL-PRF-38535, all parameters are tested standard warranty. Production processing does not necessarily include unless otherwise noted. On all other products, production testing of all parameters. processing does not necessarily include testing of all parameters.

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