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National Semiconductor DM8544N TRI-STATE Quad Switch Debouncer TTL 16-Pin DIP
National Semiconductor DM8544N TRI-STATE Quad Switch Debouncer TTL 16-Pin DIP
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$8.95 USD
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$8.95 USD
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ITEM SPECIFICS
Brand: National Semiconductor
MPN: DM8544N
Series: DM7544/DM8544
Type: TRI-STATE Quad Switch Debouncer
Logic Technology: TTL
Number of Channels: 4
Output Type: TRI-STATE
Package: 16-Pin Molded DIP
Mounting Type: Through Hole
Additional Visible Markings: I
Date Code: 8227 (1982, week 27)
Quantity: 1
Condition: New
DESCRIPTION
National Semiconductor DM8544N TRI-STATE quad switch debouncer in a 16-pin molded dual in-line package. The photographed unit carries the National Semiconductor logo with the I8227 and DM8544N markings. A light-colored stripe of residue is visible across the pin 1 end of the package; see photos.
Features:
Four switch debouncer channels in one package.
TRI-STATE outputs.
TTL logic family.
Designed for front panels and similar applications where switch contact bounce must be eliminated.
16-pin molded DIP for through-hole mounting.
Compatibility:
Direct replacement for DM8544N and DM8544 in boards designed for the DM8544 pinout. Common in front-panel switch inputs on vintage test equipment, instrumentation, and industrial controls.
Q&A:
Q: What does the DM8544 do?
A: It removes contact bounce from mechanical switches so each press produces a single clean logic transition.
Q: What is the difference between the DM7544 and DM8544?
A: They are the same function in National Semiconductor's DM7544/DM8544 family. The DM7544 is the military-temperature version and the DM8544 is the commercial version.
Q: What does I8227 mean?
A: 8227 is the date code (1982, week 27).
Troubleshooting:
Check the supply voltage at the VCC and ground pins.
If outputs float, check the TRI-STATE enable input.
Confirm switch wiring matches the datasheet connection diagram.
Compare input and output states against the datasheet function table.
DISCLAIMER
Please review all photos and specifications before purchasing, and make sure this part is right for your application. Item is sold as shown in the photos.
LEGAL DISCLAIMER
American Industrial Parts Group is not an authorized distributor, reseller, or representative of National Semiconductor. All product names, trademarks, brands, and logos are the property of their respective owners and are used for identification purposes only. As an independent reseller, the original manufacturer warranty does not apply.
DM8544N, DM8544, 8544N, DM7544, National Semiconductor DM8544N, NSC DM8544N, quad switch debouncer, switch debouncer IC, switch debounce circuit, push button debounce circuit, hardware debounce circuit, TRI-STATE debouncer, 16-pin DIP IC, vintage TTL IC 1982, front panel switch bounce fix, push button double trigger repair.
Thank you for shopping with American Industrial Parts Group!
Brand: National Semiconductor
MPN: DM8544N
Series: DM7544/DM8544
Type: TRI-STATE Quad Switch Debouncer
Logic Technology: TTL
Number of Channels: 4
Output Type: TRI-STATE
Package: 16-Pin Molded DIP
Mounting Type: Through Hole
Additional Visible Markings: I
Date Code: 8227 (1982, week 27)
Quantity: 1
Condition: New
DESCRIPTION
National Semiconductor DM8544N TRI-STATE quad switch debouncer in a 16-pin molded dual in-line package. The photographed unit carries the National Semiconductor logo with the I8227 and DM8544N markings. A light-colored stripe of residue is visible across the pin 1 end of the package; see photos.
Features:
Four switch debouncer channels in one package.
TRI-STATE outputs.
TTL logic family.
Designed for front panels and similar applications where switch contact bounce must be eliminated.
16-pin molded DIP for through-hole mounting.
Compatibility:
Direct replacement for DM8544N and DM8544 in boards designed for the DM8544 pinout. Common in front-panel switch inputs on vintage test equipment, instrumentation, and industrial controls.
Q&A:
Q: What does the DM8544 do?
A: It removes contact bounce from mechanical switches so each press produces a single clean logic transition.
Q: What is the difference between the DM7544 and DM8544?
A: They are the same function in National Semiconductor's DM7544/DM8544 family. The DM7544 is the military-temperature version and the DM8544 is the commercial version.
Q: What does I8227 mean?
A: 8227 is the date code (1982, week 27).
Troubleshooting:
Check the supply voltage at the VCC and ground pins.
If outputs float, check the TRI-STATE enable input.
Confirm switch wiring matches the datasheet connection diagram.
Compare input and output states against the datasheet function table.
DISCLAIMER
Please review all photos and specifications before purchasing, and make sure this part is right for your application. Item is sold as shown in the photos.
LEGAL DISCLAIMER
American Industrial Parts Group is not an authorized distributor, reseller, or representative of National Semiconductor. All product names, trademarks, brands, and logos are the property of their respective owners and are used for identification purposes only. As an independent reseller, the original manufacturer warranty does not apply.
DM8544N, DM8544, 8544N, DM7544, National Semiconductor DM8544N, NSC DM8544N, quad switch debouncer, switch debouncer IC, switch debounce circuit, push button debounce circuit, hardware debounce circuit, TRI-STATE debouncer, 16-pin DIP IC, vintage TTL IC 1982, front panel switch bounce fix, push button double trigger repair.
Thank you for shopping with American Industrial Parts Group!
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