SN74ALS645ANSAlternatives & Equivalent Parts
About SN74ALS645ANS
SN74ALS645ANS is a Integrated Circuit component manufactured by Texas Instruments. It comes in a Small Outline Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
Specification Comparison
| Parameter | SN74ALS645ANSSource | SN74ALS645ADW | SN74ALS245ADW | SN74ALS645A-1NSR | SN74ALS645ADWR | SN74ALS645A-1DW | SN74ALS620ADW | SN74ALS245ANSRG4 | SN74ALS640BDW |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package Type | Small Outline Packages | Small Outline Packages | Small Outline Packages | Small Outline Packages | Small Outline Packages | Other | Other | Small Outline Packages | — |
| Pin Count | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | — |
| Temperature Range | — | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | — |
| Price | $0.5994 | $1.1948 | $0.4550 | — | $0.9858 | $0.4419 | $4.1600 | $0.5450 | $1.5000 |
| Electrical Parameters | |||||||||
| YTEOL | — | 0 | 0 | 15 | 15 | 0 | 15 | 15 | — |
| Additional Feature | — | WITH DIRECTION CONTROL | WITH DIRECTION CONTROL,84030012A,8403001RA,8403001SA IS DELETED FOR SUBGROUP FIX | WITH DIRECTION CONTROL,SNJ54AS645J,84033012A,8403301RA,8403301SA IS DELETED FOR SUBGROUP FIX | WITH DIRECTION CONTROL | WITH DIRECTION CONTROL | WITH INDEPENDENT OUTPUT ENABLE FOR EACH DIRECTION | WITH DIRECTION CONTROL,84030012A,8403001RA,8403001SA IS DELETED FOR SUBGROUP FIX | — |
| Control Type | — | COMMON CONTROL | COMMON CONTROL | COMMON CONTROL | COMMON CONTROL | COMMON CONTROL | INDEPENDENT CONTROL | COMMON CONTROL | — |
| Count Direction | — | BIDIRECTIONAL | BIDIRECTIONAL | BIDIRECTIONAL | BIDIRECTIONAL | BIDIRECTIONAL | BIDIRECTIONAL | BIDIRECTIONAL | — |
| Family | — | ALS | ALS | ALS | ALS | ALS | ALS | ALS | — |
| JESD-30 Code | — | R-PDSO-G20 | R-PDSO-G20 | R-PDSO-G20 | R-PDSO-G20 | R-PDSO-G20 | R-PDSO-G20 | R-PDSO-G20 | — |
| JESD-609 Code | — | e4 | e4 | e4 | e4 | e4 | e4 | e4 | — |
| Load Capacitance (CL) | — | 50 pF | 50 pF | 50 pF | 50 pF | 50 pF | 50 pF | 50 pF | — |
| Logic IC Type | — | BUS TRANSCEIVER | BUS TRANSCEIVER | BUS TRANSCEIVER | BUS TRANSCEIVER | BUS TRANSCEIVER | BUS TRANSCEIVER | BUS TRANSCEIVER | — |
| Max I(ol) | — | 0.024 A | 0.024 A | 0.024 A | 0.024 A | 0.024 A | 0.024 A | 0.024 A | — |
| Number of Bits | — | 8 | 8 | 8 | 8 | 8 | 8 | 8 | — |
| Number of Functions | — | 8 | 8 | 8 | 8 | 8 | 8 | 8 | — |
| Number of Ports | — | 2 | 2 | 2 | 2 | 2 | 2 | 2 | — |
| Output Characteristics | — | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | — |
| Output Polarity | — | TRUE | TRUE | TRUE | TRUE | TRUE | INVERTED | TRUE | — |
| Package Body Material | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | — |
| Package Equivalence Code | — | SOP20,.4 | SOP20,.4 | SOP20,.3 | SOP20,.4 | SOP20,.4 | SOP20,.4 | SOP20,.3 | — |
| Package Shape | — | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | — |
| Package Style | — | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | — |
| Packing Method | — | TUBE | TUBE | TR | TR | TUBE | TUBE | TR | — |
| Peak Reflow Temperature (Cel) | — | 260 | 260 | 260 | 260 | 260 | 260 | 260 | — |
| Power Supply Current-Max (ICC) | — | 58 mA | 55 mA | 58 mA | 58 mA | 58 mA | 47 mA | 58 mA | — |
| Prop. Delay@Nom-Sup | — | 10 ns | 10 ns | 10 ns | 10 ns | 10 ns | 10 ns | 10 ns | — |
| Propagation Delay (tpd) | — | 10 ns | 10 ns | 10 ns | 10 ns | 10 ns | 10 ns | 10 ns | — |
| Qualification Status | — | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | — |
| Schmitt Trigger | — | NO | NO | NO | NO | NO | NO | NO | — |
| Supply Voltage-Max (Vsup) | — | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | — |
| Supply Voltage-Min (Vsup) | — | 4.5 V | 4.5 V | 4.5 V | 4.5 V | 4.5 V | 4.5 V | 4.5 V | — |
| Supply Voltage-Nom (Vsup) | — | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | — |
| Surface Mount | — | YES | YES | YES | YES | YES | YES | YES | — |
| Technology | — | TTL | TTL | TTL | TTL | TTL | TTL | TTL | — |
| Temperature Grade | — | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL | — |
| Terminal Finish | — | NICKEL PALLADIUM GOLD | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | NICKEL PALLADIUM GOLD | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | — |
| Terminal Form | — | GULL WING | GULL WING | GULL WING | GULL WING | GULL WING | GULL WING | GULL WING | — |
| Terminal Pitch | — | 1.27 mm | 1.27 mm | 1.27 mm | 1.27 mm | 1.27 mm | 1.27 mm | 1.27 mm | — |
| Terminal Position | — | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | — |
| Time@Peak Reflow Temperature-Max (s) | — | 30 | 30 | 30 | 30 | 30 | 30 | 30 | — |
| Pbfree Code | — | — | — | Yes | Yes | — | Yes | Yes | — |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Quick Links
Bus Transceiver, ALS Series, 8-Func, 8-Bit, True Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, True Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, True Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, True Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, True Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, Inverted Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, True Output, TTL, PDSO20
Bus Transceiver, ALS Series, 8-Func, 8-Bit, Inverted Output, TTL, PDSO20
Why Look for Alternatives?
Finding alternatives for SN74ALS645ANS is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating SN74ALS645ANS replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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What is equivalent to SN74ALS645ANS?
Known equivalents for SN74ALS645ANS include SN74ALS645ADW, SN74ALS245ADW, SN74ALS645A-1NSR. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of SN74ALS645ANS?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify SN74ALS645ANS alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.