SCLS327H March   1996  – October 2014 SN74AHC16244

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  Handling Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Switching Characteristics, VCC = 3.3 V ± 0.3 V
    7. 7.7  Switching Characteristics, VCC = 5 V ± 0.5 V
    8. 7.8  Noise Characteristics
    9. 7.9  Operating Characteristics
    10. 7.10 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DGG|48
  • DL|48
  • DGV|48
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9 Detailed Description

9.1 Overview

The SNx4AHC16244 devices are 16-bit buffers and line drivers designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters

These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. They provide true outputs and symmetrical active-low output-enable (OE) inputs.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN54AHC16244 is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74AHC16244 is characterized for operation from –40°C to 85°C.

9.2 Functional Block Diagram

logic_diagram_scls327.gifFigure 4. Logic Diagram (Positive Logic)
logic_symbol_scls327.gif
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Figure 5. Logic Symbol

9.3 Feature Description

  • Wide operating voltage range
    • Operates from 2 V to 5.5 V
  • Allows down voltage translation
    • Inputs accept voltages up to 5.5 V
  • Slows edges rates, minimizing output ringing

9.4 Device Functional Modes

Table 1. Function Table
(Each 4-bit Buffer/Driver)

INPUTS OUTPUT
Y
OE A
L H H
L L L
H X High-Z