STMicroelectronics M74HC299 8-Bit PIPO Shift Register Datasheet

The M74HC299 is an high speed CMOS 8 BIT PIPO SHIFT REGISTER (3-STATE) fabricated with silicon gate C2MOS technology. This device has four modes (HOLD, SHIFT LEFT, SHIFT RIGHT and LOAD DATA). Each mode is chosen by two function select inputs (S0, S1). When one or both enable inputs, (G1, G2) are high, the eight input/output terminals are in the high impedance state; however sequential operation or clearing of the register is not affected. Clear function on the M74HC299 is asynchronous to CLOCK. All inputs are equipped with protection circuits against static discharge and transient excess voltage.


STMicroelectronics M74HC299 8-Bit PIPO Shift Register Datasheet - cover page
Brand
STMicroelectronics
Category
Other Electronics
Document type
Datasheet
Language
English
Pages
13
File format
PDF
File size
413 KB
Published
10 August, 2012
Updated
30 September, 2023
MD5 checksum
D8D85BE108854602809FA95886077EA9

About this manual

The M74HC299 is a high-speed CMOS 8-bit PIPO (Parallel-In Parallel-Out) shift register fabricated with silicon gate C2MOS technology. It features four operating modes: HOLD, SHIFT LEFT, SHIFT RIGHT, and LOAD DATA, selected via two function select inputs (S0, S1). The device includes an asynchronous master reset (CLEAR) input and three-state outputs compatible with the 74 series 299.

What's inside

  • Description
  • Pin Connection
  • Truth Table
  • Logic Diagram
  • Timing Chart
  • Absolute Maximum Ratings
  • Recommended Operating Conditions
  • DC Specifications
  • AC Electrical Characteristics
  • Mechanical Data

Specifications

Operating Voltage Range2V to 6V
Number of Bits8 Bit
Operating Temperature Range-55 to 125 °C

Frequently asked questions

What are the four operating modes of the M74HC299?

The device has four modes: HOLD, SHIFT LEFT, SHIFT RIGHT, and LOAD DATA.

Is the clear function synchronous or asynchronous?

The clear function on the M74HC299 is asynchronous to CLOCK.

Is the M74HC299 pin compatible with the 74 series?

Yes, it is pin and function compatible with the 74 series 299.

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