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Texas Instruments SN74ALS645A-1N — Analog & Data Acquisition

SN74ALS645A-1N 74ALS 8-bit Transceiver, Non-Inverting

MPNSN74ALS645A-1N
End of Life

Texas Instruments 74ALS series SN74ALS645A-1N, Transceiver, Non-Inverting, 3-State, 8-bit, 15mA/24mA output, 4.5V~5.5V, 20-DIP (0.300", 7.62mm), Through Hole, 0°C to 70°C.

$2.54Ref. price · indicative, final on quote
Packaging20-DIP (0.300", 7.62mm)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

SN74ALS645A-1N Technical Specifications
ParameterValue
Series74ALS
Logic typeTransceiver, Non-Inverting
Output type3-State
Mounting typeThrough Hole
Voltage4.5V ~ 5.5V
Current - output high, low15mA, 24mA
Operating temperature0°C ~ 70°C (TA)
PackageTube
Case20-DIP (0.300\", 7.62mm)
Number of elements1
Number of bits per element8

Product details

8-bit bus transceiver for 5 V backplanes

Output drive is rated at 15 mA sourcing and 24 mA sinking per channel. Supply range is 4.5 V to 5.5 V. Operating temperature is limited to 0°C to 70°C, so this part is intended for indoor, temperature-controlled environments — office equipment, benchtop instruments, and telecom racks with active cooling. It is not rated for industrial enclosures or outdoor deployment.

Output drive and bus loading

The 15 mA high-level and 24 mA low-level output current ratings define the drive capability.

Lifecycle and compliance

This is a key advantage for sustaining a BOM line that requires the through-hole DIP footprint — many 74ALS parts have migrated to surface-mount only, but this variant is still being manufactured. ROHS3 compliance is confirmed, covering the ten restricted substances plus the four phthalates. No separate lead-free conversion is needed; the part ships compliant for EU and global markets.

Sourcing and availability

Because the lifecycle is Active, there is no LTB risk and no need to stockpile against an obsolescence event — normal procurement cycles apply.

Frequently asked questions

Is SN74ALS645A-1N RoHS compliant?

Yes, SN74ALS645A-1N is ROHS3 Compliant, covering all ten restricted substances plus the four phthalates.

Can I substitute SN74ALS645A-1N with SN74ALS645A?

The base part SN74ALS645A shares the same logic function and 20-DIP footprint, but the -1N suffix indicates a specific speed grade and package variant. Verify the timing and output drive specs in the respective datasheets before substituting in a production BOM.