SN74HC High-Speed CMOS Logic Variants
Texas Instruments SN74HC devices are high-speed CMOS logic ICs for 2 V to 6 V systems, covering gates, counters, registers, buffers, and interface logic in DIP, SOIC, SSOP, and TSSOP packages.
CMOS logic for 5 V-compatible digital designs
Use this page to compare SN74HC logic functions, package options, supply range, and timing characteristics.
The SN74HC family from Texas Instruments is a broad high-speed CMOS logic line used in digital systems that need low static power and operation across a 2 V to 6 V supply range. It includes familiar logic building blocks such as NAND, NOR, AND, OR, XOR, inverters, buffers, counters, latches, flip-flops, decoders, multiplexers, and shift registers. The parts are common in industrial controls, test fixtures, legacy 5 V systems, and mixed logic boards where standard CMOS thresholds are appropriate.
Compared with TTL-derived LS logic, SN74HC generally offers much lower input current and wider supply flexibility. Compared with low-voltage LVC logic, it remains useful where 5 V operation and established HC timing are required. Many variants are available in through-hole DIP for maintenance or prototyping and SOIC, SSOP, and TSSOP for production assemblies.
When selecting SN74HC, check input threshold compatibility carefully. HC inputs expect CMOS levels, while HCT devices are often chosen when TTL-level inputs must be accepted on a 5 V rail. Also confirm output drive, propagation delay, fanout, package pinout, and temperature grade. Octatronics groups SN74HC ordering codes so designers can compare logic functions and sourcing options in one place.
Key Features
- 5 V-capable CMOS logic family with low static input current
- Broad function coverage for legacy and new digital designs
- Through-hole and surface-mount packages available
- Often used where CMOS input thresholds are acceptable
- Useful alternative family to compare against HCT, LS, and LVC logic
Target Applications
- Industrial digital logic boards
- Test and measurement fixtures
- Legacy 5 V system maintenance
- Counter, latch, and register expansion
- General-purpose control and glue logic
Ordering Variants
Compare 459 SN74HC part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| SN74HC240N | Package: PDIP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Output Current: 7.8mA | Max Output Current: 7.8mA | Number of Channels: 8 | Number of Outputs: 8 | PDIP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC241PW | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Channels: 8 | Number of Outputs: 8 | Number of Bits: 8 | Logic Function: Buffer, Inverting | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC374PWR | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Output Current: 7.8mA | Number of Outputs: 8 | Number of Bits: 8 | Frequency: 28MHz | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC573AN | Package: PDIP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Output Current: 7.8mA | Number of Channels: 8 | Number of Outputs: 8 | Number of Bits: 8 | PDIP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC646NT | Package: PDIP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Channels: 8 | Number of Outputs: 8 | Number of Bits: 8 | Logic Function: Transceiver, Inverting | PDIP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC161DRG4 | Package: SOIC | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 44MHz | Logic Function: Counter | Max Operating Temp: 85°C | SOIC | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC161NE4 | Package: PDIP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 44MHz | Logic Function: Counter | Max Operating Temp: 85°C | PDIP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC161PWT | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 44MHz | Max Frequency: 44MHz | Logic Function: Counter | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC163PWR | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 44MHz | Logic Function: Counter | Max Operating Temp: 85°C | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC191N | Package: PDIP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 19MHz | Logic Function: Counter | Max Operating Temp: 85°C | PDIP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC193DR | Package: SOIC | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 60MHz | Logic Function: Counter | Max Operating Temp: 85°C | SOIC | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC193PW | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 60MHz | Logic Function: Counter | Max Operating Temp: 85°C | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC393PWT | Package: TSSOP | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 4 | Frequency: 60MHz | Max Frequency: 60MHz | Logic Function: Counter | Max Operating Temp: 85°C | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4020PW | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 14 | Frequency: 53MHz | Logic Function: Counter | Max Operating Temp: 85°C | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4020PWR | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 14 | Frequency: 53MHz | Logic Function: Counter | Max Operating Temp: 85°C | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4040DG4 | Package: SOIC | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 12 | Frequency: 53MHz | Logic Function: Counter | Max Operating Temp: 85°C | SOIC | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4040DT | Package: SOIC | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 12 | Frequency: 53MHz | Max Frequency: 53MHz | Logic Function: Counter | SOIC | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4040NE4 | Package: PDIP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 12 | Frequency: 53MHz | Logic Function: Counter | Max Operating Temp: 85°C | PDIP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4040PW | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 12 | Frequency: 53MHz | Logic Function: Counter | Max Operating Temp: 85°C | TSSOP | Texas Instruments | Active | Compliant | In Stock | |
| SN74HC4040PWT | Package: TSSOP | Operating Supply Voltage: 5V | Max Supply Voltage: 6V | Min Supply Voltage: 2V | Number of Bits: 12 | Frequency: 53MHz | Max Frequency: 53MHz | Logic Function: Counter | TSSOP | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on SN74HC map to package, grade, and reel options.
[{"code":"SN74HC00 / 02 / 04 / 08 / 32","meaning":"Standard gate and inverter functions in the HC CMOS family."},{"code":"SN74HC74 / 138 / 595 / 4066","meaning":"Common flip-flop, decoder, shift-register, and switch functions frequently used in control logic."},{"code":"HC vs HCT","meaning":"HC uses CMOS input thresholds; HCT variants are usually selected for TTL-compatible input thresholds at 5 V."},{"code":"N, D, PW, DB suffixes","meaning":"Package and packing indicators such as DIP, SOIC, TSSOP, or SSOP. Verify the exact package drawing."}]
How to Choose the Right SN74HC Buffers, Drivers, Receivers and Transceivers
Confirm input thresholds
Use HC for CMOS-level signals and HCT when TTL-level compatibility is required on a 5 V system.
Match propagation delay
Counters, bus timing, and clocked logic need delay checks across voltage and temperature.
Choose serviceability
DIP variants help maintenance and lab builds; SOIC/TSSOP/SSOP variants reduce board area in production.
Technical Specifications
Core parameters for SN74HC product family
Source SN74HC with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 459 ordering variants from Texas Instruments. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the SN74HC product family.