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Texas Instruments SN74HCT32D — Analog & Data Acquisition
Texas Instruments

SN74HCT32D OR Gate, 4-ch 2-input, 14-SOIC, 22ns @ 5.5V

MPNSN74HCT32D
End of Life

Texas Instruments 74HCT series OR Gate, SN74HCT32D, 4-ch 2-input, surface-mount 14-SOIC, 4.5 V to 5.5 V supply, 22 ns max propagation delay at 5.5 V 50 pF, -40°C to 85°C, active, ROHS3.

$1.16Ref. price · indicative, final on quote
SN74HCT32D datasheet
Packaging14-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
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Specifications

SN74HCT32D Technical Specifications
ParameterValue
Series74HCT
Logic typeOR Gate
Mounting typeSurface Mount
Voltage4.5V ~ 5.5V
Current - quiescent2 µA
Current - output high, low4mA, 4mA
Number of inputs2
Operating temperature-40°C ~ 85°C
PackageTube
Case14-SOIC (0.154\", 3.90mm Width)
Number of circuits4
Input logic level - low0.8V
Input logic level - high2V
Max propagation delay @ v, max CL22ns @ 5.5V, 50pF

Product details

Quad 2-input OR gate in 14-SOIC – 74HCT with TTL-compatible thresholds

This makes it a direct replacement for 74LS-series OR gates in existing 5 V designs without needing to re-terminate or adjust pull-up networks. The four independent OR gates each can source or sink 4 mA, and quiescent current is a maximum of 2 µA.

22 ns propagation delay – timing margin for 5 V buses

The maximum propagation delay is 22 ns at 5.5 V with a 50 pF load. In a 5 V logic chain, this sets the worst-case settling time for the OR gate's output. If the next stage has a setup-time requirement, the 22 ns figure must be included in the total path delay calculation. The 74HCT family's TTL-compatible inputs mean the SN74HCT32D can be driven directly by older 5 V TTL outputs without level translation.

This means it is still in regular production, with no announced end-of-life or last-time-buy window.

Frequently asked questions

What is the difference between SN74HCT32D and SN74LS32?

Both are quad 2-input OR gates, but the SN74HCT32D uses HCT (High-speed CMOS with TTL-compatible inputs) technology, while the SN74LS32 uses LS (Low-power Schottky TTL). The LS32 has a slightly faster propagation delay (typically 15 ns) but consumes far more power. The HCT32D is the drop-in replacement for most 5 V TTL systems where power matters.

Is the SN74HCT32D compatible with 5 V logic?

Yes. It can be driven directly by 5 V TTL outputs and its outputs swing rail-to-rail, making it fully compatible with 5 V CMOS and TTL logic families.

What is an equivalent or substitute for the SN74HCT32D?

A functional equivalent is the SN74AC32DR, which is also a quad 2-input OR gate in a 14-SOIC package. If your design uses TTL drive levels, the HCT32D is the correct choice; if you can tolerate CMOS thresholds, the AC32 is a faster alternative.