SN74AC373NSR
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Texas Instruments SN74AC373NSR

Manufacturer No:
SN74AC373NSR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC OCT D-TYP TRANSP LATCH 20SO
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Payment:
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Product Introduction

Overview

The SN74AC373NSR is an octal D-type transparent latch with 3-state outputs, manufactured by Texas Instruments. This integrated circuit is designed to operate over a wide range of supply voltages from 2V to 6V, making it versatile for various applications. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs, and when LE is low, the Q outputs are latched at the logic levels of the D inputs. The device also features a buffered output-enable (OE) input that can place the eight outputs in either a normal logic state or a high-impedance state, which is useful for driving bus lines without the need for interface or pullup components.

Key Specifications

Parameter Test Conditions Unit Min Typ Max
VCC Supply Voltage Range - V -0.5 - 7
VI Input Voltage Range - V -0.5 - VCC + 0.5
VO Output Voltage Range - V -0.5 - VCC + 0.5
IOH High-Level Output Current VCC = 3 V mA -12 - -12
IOL Low-Level Output Current VCC = 3 V mA 12 - 12
Ta Operating Free-Air Temperature - °C -40 - 85
tPLH Propagation Delay Time, LE to Q VCC = 5 V, CL = 15 pF ns 7.3 - 13.5
tPHL Propagation Delay Time, LE to Q VCC = 5 V, CL = 15 pF ns 7.3 - 13.5
RθJA Junction-to-Ambient Thermal Resistance - °C/W 60 - 126.2

Key Features

  • Operation over a wide range of supply voltages from 2V to 6V.
  • 3-state noninverting outputs capable of driving bus lines directly.
  • Full parallel access for loading data into the latches.
  • Buffered output-enable (OE) input to control the output state (normal logic or high-impedance state).
  • High drive capability to handle highly capacitive or low-impedance loads.
  • Low propagation delay times, with a maximum of 9.5 ns at VCC = 5 V.
  • Available in various packages including SSOP, SOIC, PDIP, SOP, and TSSOP.

Applications

  • Buffer registers: The SN74AC373NSR can be used to implement buffer registers due to its ability to latch data and drive bus lines.
  • I/O ports: Suitable for implementing input/output ports in digital systems.
  • Bidirectional bus drivers: The 3-state outputs make it ideal for driving bus lines in bidirectional communication systems.
  • Working registers: Can be used as working registers in various digital circuits).

Q & A

  1. What is the operating voltage range of the SN74AC373NSR?

    The SN74AC373NSR operates over a supply voltage range from 2V to 6V).

  2. What is the purpose of the output-enable (OE) input?

    The OE input can place the outputs in either a normal logic state or a high-impedance state, which is useful for driving bus lines without interface or pullup components).

  3. What are the typical propagation delay times for the SN74AC373NSR?

    The typical propagation delay times are around 7.3 ns to 13.5 ns depending on the load capacitance and supply voltage).

  4. What are the thermal characteristics of the SN74AC373NSR?

    The junction-to-ambient thermal resistance (RθJA) varies by package, with values ranging from 60°C/W to 126.2°C/W).

  5. What are the recommended operating conditions for the input and output voltages?

    The input voltage range is from 0 to VCC + 0.5V, and the output voltage range is from 0 to VCC + 0.5V).

  6. What is the maximum continuous output current for the SN74AC373NSR?

    The maximum continuous output current is ±50 mA).

  7. What are the typical high-level and low-level output currents?

    The typical high-level output current is -12 mA to -24 mA, and the typical low-level output current is 12 mA to 24 mA, depending on the supply voltage).

  8. What are the common applications of the SN74AC373NSR?

    Common applications include buffer registers, I/O ports, bidirectional bus drivers, and working registers).

  9. What packages are available for the SN74AC373NSR?

    The device is available in SSOP, SOIC, PDIP, SOP, and TSSOP packages).

  10. How does the latch-enable (LE) input function?

    When the LE input is high, the Q outputs follow the D inputs. When LE is low, the Q outputs are latched at the logic levels of the D inputs).

Product Attributes

Logic Type:D-Type Transparent Latch
Circuit:8:8
Output Type:Tri-State
Voltage - Supply:2V ~ 6V
Independent Circuits:1
Delay Time - Propagation:7.5ns
Current - Output High, Low:24mA, 24mA
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:20-SOIC (0.209", 5.30mm Width)
Supplier Device Package:20-SO
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Similar Products

Part Number SN74AC373NSR SN74AHC373NSR SN74AC573NSR SN74ACT373NSR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active
Logic Type D-Type Transparent Latch D-Type Transparent Latch D-Type Transparent Latch D-Type Transparent Latch
Circuit 8:8 8:8 8:8 8:8
Output Type Tri-State Tri-State Tri-State Tri-State
Voltage - Supply 2V ~ 6V 2V ~ 5.5V 2V ~ 6V 4.5V ~ 5.5V
Independent Circuits 1 1 1 1
Delay Time - Propagation 7.5ns 1ns 2.5ns 8.5ns
Current - Output High, Low 24mA, 24mA 8mA, 8mA 24mA, 24mA 24mA, 24mA
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 20-SOIC (0.209", 5.30mm Width) 20-SOIC (0.209", 5.30mm Width) 20-SOIC (0.209", 5.30mm Width) 20-SOIC (0.209", 5.30mm Width)
Supplier Device Package 20-SO 20-SO 20-SO 20-SO

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