SN74ALS990

Name: SN74ALS990
Brand: TI
SKU: SN74ALS990
Price: 5.247 USD

활성

8진 D형 트랜스페어런스 다시 읽기 래치

지금 주문

데이터 시트

document-pdfAcrobat 8-Bit D-Type Transparent Read-Back Latch datasheet (Rev. B) (영어)

SN74ALS990

활성

데이터 시트

지금 주문

제품 상세 정보

Number of channels

Technology family

ALS

Supply voltage (min) (V)

4.5

Supply voltage (max) (V)

5.5

Input type

Bipolar

Output type

3-State

Clock frequency (max) (MHz)

IOL (max) (mA)

IOH (max) (mA)

2.6

Supply current (max) (µA)

70000

Features

Flow-through pinout, High speed (tpd 10-50ns)

Operating temperature range (°C)

0 to 70

Rating

Catalog

Number of channels

Technology family

ALS

Supply voltage (min) (V)

4.5

Supply voltage (max) (V)

5.5

Input type

Bipolar

Output type

3-State

Clock frequency (max) (MHz)

IOL (max) (mA)

IOH (max) (mA)

2.6

Supply current (max) (µA)

70000

Features

Flow-through pinout, High speed (tpd 10-50ns)

Operating temperature range (°C)

0 to 70

Rating

Catalog

PDIP (N)

228.702 mm² 24.33 x 9.4

SOIC (DW)

131.84 mm² 12.8 x 10.3

3-State I/O-Type Read-Back Inputs
Bus-Structured Pinout
True Logic Outputs
Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs

3-State I/O-Type Read-Back Inputs
Bus-Structured Pinout
True Logic Outputs
Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs

This 8-bit latch is designed specifically for storing the contents of the input data bus and providing the capability of reading back the stored data onto the input data bus.

The eight latches are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs.

Read back is provided through the output-enable () input. When is taken low, the data present at the output of the data latches is allowed to pass back onto the input data bus. When is taken high, the output of the data latches is isolated from the D inputs. does not affect the internal operation of the latches; however, precautions should be taken not to create a bus conflict.

The SN74ALS990 is characterized for operation from 0°C to 70°C.

This 8-bit latch is designed specifically for storing the contents of the input data bus and providing the capability of reading back the stored data onto the input data bus.

The eight latches are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs.

The SN74ALS990 is characterized for operation from 0°C to 70°C.

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