SN74HC21NAlternatives & Equivalent Parts
About SN74HC21N
SN74HC21N is a Integrated Circuit component manufactured by Texas Instruments. It comes in a Dual-In-Line Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | SN74HC21NSource | SN74HC02N | SN74HC595NE4 | ML-50-S1BYF-2P | SN74HC126N | 37204-62A3-004PL | SN74HC21D | SN74HC21NSR | SN74HC21DR |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Sato Parts | Texas Instruments | 3M | Texas Instruments | Texas Instruments | Texas Instruments |
| Package Type | Dual-In-Line Packages | Dual-In-Line Packages | — | Other | Dual-In-Line Packages | Other | Small Outline Packages | Small Outline Packages | Small Outline Packages |
| Pin Count | 14 | 14 | — | 2 | 14 | 6 | 14 | 14 | 14 |
| Temperature Range | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | — | — | -40.0°C ~ 85.0°C | — | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $0.2734 | $0.2092 | $1.0400 | $0.9895 | $0.1488 | $1.1800 | $0.3731 | $0.2651 | $0.0882 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | ACTIVE | — | ACTIVE | ACTIVE | ACTIVE | OBSOLETE | ACTIVE | ACTIVE |
| Electrical Parameters | |||||||||
| Pbfree Code | Yes | Yes | — | — | Yes | Yes | — | Yes | Yes |
| YTEOL | 15 | 15 | — | — | 15 | 8 | 0 | 15 | 15 |
| Family | HC/UH | HC/UH | — | — | HC/UH | — | HC/UH | HC/UH | HC/UH |
| JESD-30 Code | R-PDIP-T14 | R-PDIP-T14 | — | — | R-PDIP-T14 | — | R-PDSO-G14 | R-PDSO-G14 | R-PDSO-G14 |
| JESD-609 Code | e4 | e4 | — | — | e4 | e4 | e4 | e4 | e4 |
| Load Capacitance (CL) | 50 pF | 50 pF | — | — | 150 pF | — | 50 pF | 50 pF | 50 pF |
| Logic IC Type | AND GATE | NOR GATE | — | — | BUS DRIVER | — | AND GATE | AND GATE | AND GATE |
| Max I(ol) | 0.0052 A | 0.0052 A | — | — | 0.006 A | — | 0.0052 A | 0.0052 A | 0.0052 A |
| Number of Functions | 2 | 4 | — | — | 4 | — | 2 | 2 | 2 |
| Number of Inputs | 4 | 2 | — | — | — | — | 4 | 4 | 4 |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | — | — | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | DIP14,.3 | DIP14,.3 | — | — | DIP14,.3 | — | SOP14,.25 | SOP14,.3 | SOP14,.25 |
| Package Shape | RECTANGULAR | RECTANGULAR | — | — | RECTANGULAR | — | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package Style | IN-LINE | IN-LINE | — | — | IN-LINE | — | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE |
| Packing Method | TUBE | TUBE | — | — | TUBE | — | TUBE | TR | TR |
| Power Supply Current-Max (ICC) | 0.02 mA | 0.02 mA | — | — | 0.08 mA | — | 0.02 mA | 0.02 mA | 0.02 mA |
| Prop. Delay@Nom-Sup | 28 ns | 23 ns | — | — | 30 ns | — | 28 ns | 28 ns | 28 ns |
| Propagation Delay (tpd) | 140 ns | 115 ns | — | — | 188 ns | — | 140 ns | 140 ns | 140 ns |
| Qualification Status | Not Qualified | Not Qualified | — | — | Not Qualified | — | Not Qualified | Not Qualified | Not Qualified |
| Schmitt Trigger | NO | NO | — | — | — | — | NO | NO | NO |
| Supply Voltage-Max (Vsup) | 6 V | 6 V | — | — | 6 V | — | 6 V | 6 V | 6 V |
| Supply Voltage-Min (Vsup) | 2 V | 2 V | — | — | 2 V | — | 2 V | 2 V | 2 V |
| Supply Voltage-Nom (Vsup) | 5 V | 5 V | — | — | 5 V | — | 5 V | 5 V | 5 V |
| Surface Mount | NO | NO | — | — | NO | — | YES | YES | YES |
| Technology | CMOS | CMOS | — | — | CMOS | — | CMOS | CMOS | CMOS |
| Temperature Grade | INDUSTRIAL | INDUSTRIAL | — | — | INDUSTRIAL | — | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | — | — | Nickel/Palladium/Gold (Ni/Pd/Au) | — | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE | THROUGH-HOLE | — | — | THROUGH-HOLE | — | GULL WING | GULL WING | GULL WING |
| Terminal Pitch | 2.54 mm | 2.54 mm | — | — | 2.54 mm | 2 mm | 1.27 mm | 1.27 mm | 1.27 mm |
| Terminal Position | DUAL | DUAL | — | — | DUAL | — | DUAL | DUAL | DUAL |
| ## SN74HC21N Alternates Showing results | Image | — | — | — | — | — | — | — | — |
| ## SN74HC02N Alternates Showing results | — | Image | — | — | — | — | — | — | — |
| Additional Feature | — | — | — | STANDARD: UL 94V-0, POLYBUTYLENE TEREPHTHALATE | — | 3M | — | — | — |
| Fastening Method | — | — | — | SCREW | — | — | — | — | — |
| Mounting Type | — | — | — | BOARD | — | BOARD | — | — | — |
| Number of Decks | — | — | — | 1 | — | — | — | — | — |
| Number of Rows | — | — | — | 1 | — | — | — | — | — |
| Number of Ways | — | — | — | 2 | — | — | — | — | — |
| Rated Current | — | — | — | 15 A | — | — | — | — | — |
| Rated Voltage | — | — | — | 250 V | — | — | — | — | — |
| Safety Approval | — | — | — | UL | — | — | — | — | — |
| Terminal and Terminal Block Type | — | — | — | BARRIER STRIP TERMINAL BLOCK | — | — | — | — | — |
| Control Type | — | — | — | — | ENABLE HIGH | — | — | — | — |
| Count Direction | — | — | — | — | UNIDIRECTIONAL | — | — | — | — |
| Number of Bits | — | — | — | — | 1 | — | — | — | — |
| Number of Ports | — | — | — | — | 2 | — | — | — | — |
| Output Characteristics | — | — | — | — | 3-STATE | — | — | — | — |
| Output Polarity | — | — | — | — | TRUE | — | — | — | — |
| ## SN74HC126N Alternates Showing results | — | — | — | — | Image | — | — | — | — |
| Factory Lead Time | — | — | — | — | — | 2 Weeks, 3 Days | — | — | — |
| Body/Shell Style | — | — | — | — | — | SOCKET | — | — | — |
| Connector Type | — | — | — | — | — | BOARD CONNECTOR | — | — | — |
| Contact Finish Mating | — | — | — | — | — | NOT SPECIFIED | — | — | — |
| Contact Finish Termination | — | — | — | — | — | GOLD FLASH OVER NICKEL | — | — | — |
| Contact Gender | — | — | — | — | — | FEMALE | — | — | — |
| Contact Material | — | — | — | — | — | NOT SPECIFIED | — | — | — |
| DIN Conformance | — | — | — | — | — | NO | — | — | — |
| Filter Feature | — | — | — | — | — | NO | — | — | — |
| IEC Conformance | — | — | — | — | — | NO | — | — | — |
| MIL Conformance | — | — | — | — | — | NO | — | — | — |
| Mating Information | — | — | — | — | — | MULTIPLE MATING PARTS AVAILABLE | — | — | — |
| Mixed Contacts | — | — | — | — | — | NO | — | — | — |
| Mounting Style | — | — | — | — | — | STRAIGHT | — | — | — |
| Number Of Connectors | — | — | — | — | — | ONE | — | — | — |
| Number of Rows Loaded | — | — | — | — | — | 1 | — | — | — |
| Option | — | — | — | — | — | GENERAL PURPOSE | — | — | — |
| Termination Type | — | — | — | — | — | SOLDER | — | — | — |
| Total Number of Contacts | — | — | — | — | — | 4 | — | — | — |
| UL Flammability Code | — | — | — | — | — | 94V-0 | — | — | — |
| Peak Reflow Temperature (Cel) | — | — | — | — | — | — | 260 | 260 | 260 |
| Time@Peak Reflow Temperature-Max (s) | — | — | — | — | — | — | 30 | 30 | 30 |
| ## SN74HC21D Alternates Showing results | — | — | — | — | — | — | Image | — | — |
| ## SN74HC21NSR Alternates Showing results | — | — | — | — | — | — | — | Image | — |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 8 alternatives for SN74HC21N — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for SN74HC21N 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 SN74HC21N 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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FAQ
What is equivalent to SN74HC21N?
Known equivalents for SN74HC21N include SN74HC02N, SN74HC595NE4, ML-50-S1BYF-2P. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of SN74HC21N?
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 SN74HC21N 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.