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Texas Instruments CD74HCT163M — Microcontrollers & Processors (MCU / MPU / DSP)

CD74HCT163M Texas Instruments Binary Counter, 20 MHz, Active

MPNCD74HCT163M
End of Life

Texas Instruments 74HCT series synchronous binary counter, CD74HCT163M, 4-bit, single element, up direction, 20 MHz count rate, negative edge triggered, synchronous reset, 4.5 V to 5.5 V supply, 16-SOIC surface mount package, -55°C to 125°C operating temperature, ROHS3 compliant.

$1.18Ref. price · indicative, final on quote
Texas Instruments CD74HCT163M datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Series74HCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74HCT163M specifications
ParameterValue
Series74HCT
Logic typeBinary Counter
Trigger typeNegative Edge
MountingSurface Mount
Supply voltage4.5 V ~ 5.5 V
Operating temperature-55°C ~ 125°C
ResetSynchronous
TimingSynchronous
PackageTube
DirectionUp
Count rate20 MHz
Case16-SOIC (0.154\", 3.90mm Width)
Number of elements1
Number of bits per element4

Product details

Device identity and key parametrics

The CD74HCT163M: Synchronous reset and synchronous timing mean the counter resets on the clock edge, not asynchronously — a detail that matters when the reset signal must be glitch-free in a synchronous clock domain. The single-element, 4-bit configuration is the standard building block for divide-by-N or event-counting in 5 V logic systems.

ROHS3 compliance is documented — no exemption conflicts for EU or UKCA markets.

Second-source and cross-reference note

The CY74FCT191ATSOC is a binary counter in a similar 16-SOIC but uses positive-edge triggering and has up/down direction — it may serve as a functional alternative in designs that can invert the clock polarity.

Frequently asked questions

What is CD74HCT163M's reset type and why does it matter?

The reset is Synchronous, meaning the counter resets on the next clock edge rather than immediately. This avoids metastability in synchronous clock domains but requires the reset pulse to last at least one clock period.

Will CD74HCT163M drop into a board designed for CD74HCT390E?

No — the CD74HCT390E uses a through-hole package and decade-counting logic with asynchronous reset. The CD74HCT163M is surface-mount (16-SOIC) and a binary counter with synchronous reset. A PCB layout change and logic review are required.

What compliance documentation does Texas Instruments provide for CD74HCT163M?

The part is ROHS3 compliant. Texas Instruments provides the datasheet, RoHS test reports, and material declaration sheets through their documentation portal.