SN74HC21DAlternatives & Equivalent Parts
About SN74HC21D
SN74HC21D 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 | SN74HC21DSource | CD4022BPW | SN74HC4040PW | SN74HC21DR | SN74HC21NSR |
|---|---|---|---|---|---|
| Manufacturer | 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 |
| Pin Count | 14 | 16 | 16 | 14 | 14 |
| Temperature Range | -40.0°C ~ 85.0°C | -55.0°C ~ 125.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $0.3731 | $0.4853 | $0.1320 | $0.0882 | — |
| Electrical Parameters | |||||
| YTEOL | 0 | 0 | 0 | 15 | 15 |
| Family | HC/UH | 4000/14000/40000 | HC/UH | HC/UH | HC/UH |
| JESD-30 Code | R-PDSO-G14 | R-PDSO-G16 | R-PDSO-G16 | R-PDSO-G14 | R-PDSO-G14 |
| JESD-609 Code | e4 | e4 | e4 | e4 | e4 |
| Load Capacitance (CL) | 50 pF | 50 pF | 50 pF | 50 pF | 50 pF |
| Logic IC Type | AND GATE | RING COUNTER | BINARY COUNTER | AND GATE | AND GATE |
| Max I(ol) | 0.0052 A | 0.0015 A | 0.0052 A | 0.0052 A | 0.0052 A |
| Number of Functions | 2 | 1 | 1 | 2 | 2 |
| Number of Inputs | 4 | — | — | 4 | 4 |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 | TSSOP16,.25 | TSSOP16,.25 | SOP14,.25 | SOP14,.3 |
| Package Shape | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package Style | SMALL OUTLINE | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH | SMALL OUTLINE | SMALL OUTLINE |
| Packing Method | TUBE | TUBE | TUBE | TR | TR |
| Peak Reflow Temperature (Cel) | 260 | 260 | 260 | 260 | 260 |
| Power Supply Current-Max (ICC) | 0.02 mA | 0.03 mA | 8 mA | 0.02 mA | 0.02 mA |
| Prop. Delay@Nom-Sup | 28 ns | 270 ns | 32 ns | 28 ns | 28 ns |
| Propagation Delay (tpd) | 140 ns | 650 ns | 190 ns | 140 ns | 140 ns |
| Qualification Status | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified |
| Schmitt Trigger | NO | — | — | NO | NO |
| Supply Voltage-Max (Vsup) | 6 V | 18 V | 6 V | 6 V | 6 V |
| Supply Voltage-Min (Vsup) | 2 V | 3 V | 2 V | 2 V | 2 V |
| Supply Voltage-Nom (Vsup) | 5 V | 5 V | 5 V | 5 V | 5 V |
| Surface Mount | YES | YES | YES | YES | YES |
| Technology | CMOS | CMOS | CMOS | CMOS | CMOS |
| Temperature Grade | INDUSTRIAL | MILITARY | 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) |
| Terminal Form | GULL WING | GULL WING | GULL WING | GULL WING | GULL WING |
| Terminal Pitch | 1.27 mm | 0.65 mm | 0.65 mm | 1.27 mm | 1.27 mm |
| Terminal Position | DUAL | DUAL | DUAL | DUAL | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 | NOT SPECIFIED | 30 | 30 | 30 |
| ## SN74HC21D Alternates Showing results | Image | — | — | — | — |
| Additional Feature | — | JOHNSON COUNTER WITH 8 DECODED OUTPUTS | — | — | — |
| Count Direction | — | UP | UP | — | — |
| Load/Preset Input | — | NO | NO | — | — |
| Max Frequency@Nom-Sup | — | 2500000 Hz | 22000000 Hz | — | — |
| Mode of Operation | — | SYNCHRONOUS | ASYNCHRONOUS | — | — |
| Number of Bits | — | 8 | 12 | — | — |
| Trigger Type | — | POSITIVE EDGE | NEGATIVE EDGE | — | — |
| fmax-Min | — | 5.5 MHz | 25 MHz | — | — |
| ## CD4022BPW Alternates Showing results | — | Image | — | — | — |
| ## SN74HC4040PW Alternates Showing results | — | — | Image | — | — |
| Pbfree Code | — | — | — | Yes | Yes |
| ## SN74HC21NSR Alternates Showing results | — | — | — | — | Image |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Quick Links
Why Look for Alternatives?
Finding alternatives for SN74HC21D 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 SN74HC21D 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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Request Alternatives for SN74HC21DFAQ
What is equivalent to SN74HC21D?
Known equivalents for SN74HC21D include CD4022BPW, SN74HC4040PW, SN74HC21DR. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of SN74HC21D?
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 SN74HC21D 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.