National Semiconductor DM5406 DM7406 Hex Inverting Buffers with High Voltage Open-Collector Outputs
Summary
The DM5406/DM7406 series provides hex inverting buffers featuring six independent logic gates with high-voltage open-collector outputs, ideal for robust digital circuit implementation. This manual details the comprehensive technical specifications required for integration, including absolute maximum ratings, recommended operating conditions, pull-up resistor equations, and detailed electrical characteristics (timing, current limits) necessary for reliable function. It is designed for hardware engineers building stable, high-voltage systems requiring precise logic inversion buffering.
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DM5406/DM7406 Hex Inverting Buffers with High Voltage Open-Collector Outputs General Description Pull-Up Resistor Equations This device contains six independent buffers each of which VO (Min) VOH
performs the logic INVERT function. The open-collector out- N1 (IOH) N2 (IIH) puts require external pull-up resistors for proper logical op- eration. VO (Max) VOL
IOL N3 (IIL) Where: N1 (IOH) total maximum output high current for all outputs tied to pull-up resistor N2 (IIH) total maximum input high current for all inputs tied to pull-up resistor N3 (IIL) total maximum input low current for all inputs tied to pull-up resistor
Connection Diagram
Dual-In-Line Package
TL/F/6496–1
Order Number DM5406J, DM5406W, DM7406M or DM7406N See NS Package Number J14A, M14A, N14A or W14B
Function Table
Input Output
High Logic Level Low Logic Level
C1995 National Semiconductor Corporation TL/F/6496 RRD-B30M105/Printed in U. S. A.
Page Summary Contents For National Semiconductor DM5406 DM7406 Hex Inverting Buffers with High Voltage Open-Collector Outputs
Manual Details
| Brand | National |
|---|---|
| Pages | 4 |
| File Size | 106.44 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the fundamental function of the DM5406/DM7406 chip?
It contains six independent buffers, each performing the logic INVERT function.
Do these buffers require external resistors to operate correctly?
Yes, since they are open-collector outputs, external pull-up resistors are required for proper logical operation.
What is the recommended operating temperature range for the DM5406?
The DM5406 has a standard free air operating temperature range of -55 to 125 °C.
How do I order the chip in different packages?
It is available in various packages, including J14A (Ceramic DIL), M14A (Small Outline Molded), N14A (Molded DIL), and W14B (Ceramic Flat).
Can I use the Absolute Maximum Ratings values for routine operation?
No; these ratings define safety limits, not operational parameters. Use 'Recommended Operating Conditions' for actual device operation.