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SN74HC244PW Equivalent & Substitute Parts
Part Overview
The SN74HC244PW is a non-inverting buffer logic IC manufactured by Texas Instruments, designed for 2-element, 4-bit per element configurations with 3-state output capability. This component operates across a 2V to 6V supply voltage range and is housed in a 20-TSSOP surface mount package. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN74HC244PW |
| Manufacturer | Texas Instruments |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitute parts for the SN74HC244PW are classified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:
Critical Parameters for Substitution:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 2
- Number of Bits per Element: 4
- Output Type: 3-State
- Current - Output High, Low: 7.8mA, 7.8mA
- Voltage - Supply: 2V ~ 6V
- Package / Case: 20-TSSOP (0.173", 4.40mm Width)
- Mounting Type: Surface Mount
- Base Product Number: 74HC244
Substitution Categories:
Direct Manufacturer Substitutes maintain identical electrical specifications and packaging. These parts are sourced from different manufacturers but share the same functional parameters and pin configuration.
MFR Recommended Substitutes are manufacturer-designated alternatives that meet or exceed the original specifications. These may include extended operating temperature ranges or different packaging formats (Tube, Tape & Reel, Bulk).
Parametric Equivalents share the same electrical characteristics and package type but may originate from different manufacturers or product lines. These parts are functionally interchangeable within the specified parameter constraints.
Parameter Comparison
| Parameter | SN74HC244PW | MM74HC244MTCX | 74HC244PW,112 | 74HC244PW,118 | MC74HC244ADTG | MC74HC244ADTR2G | MM74HC244MTC | SN74HC241PW |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | onsemi | Nexperia USA Inc. | NXP Semiconductors | onsemi | onsemi | Fairchild Semiconductor | Texas Instruments |
| Logic Type | Buffer, Non-Inverting | Buffer, Non-Inverting | Buffer, Non-Inverting | Buffer, Non-Inverting | Buffer, Non-Inverting | Buffer, Non-Inverting | Buffer, Non-Inverting | Buffer, Non-Inverting |
| Number of Elements | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Number of Bits per Element | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 20-TSSOP | 20-TSSOP | 20-TSSOP | 20-TSSOP | 20-TSSOP | 20-TSSOP | 20-TSSOP | 20-TSSOP |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Packaging Format | Tube | Tape & Reel (TR) | Tube | Bulk | Tube | Tape & Reel (TR) | Bulk | Tube |
| Product Status | Discontinued at DiGi Electronics | Active | Obsolete | Active | Active | Active | Active | Discontinued at DiGi Electronics |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | Not specified | ROHS3 Compliant | ROHS3 Compliant | Not specified | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | Not specified | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes (Active Product Status):
MC74HC244ADTR2G (onsemi) and MC74HC244ADTG (onsemi) are the preferred substitutes. Both maintain identical electrical specifications with extended operating temperature range (-55°C ~ 125°C) and active product status. MC74HC244ADTR2G is available in Tape & Reel format with the highest inventory (16,612 pcs), making it suitable for high-volume production. MC74HC244ADTG is available in Tube format with 737 pcs in stock.
74HC244PW,118 (NXP Semiconductors) is an active alternative with extended operating temperature range (-40°C ~ 125°C) and bulk packaging. This part offers 3,637 pcs in inventory and maintains ROHS3 compliance status.
MM74HC244MTCX (onsemi) is an active direct substitute available in Tape & Reel format with 2,058 pcs in stock. This part maintains identical electrical specifications and operating temperature range (-40°C ~ 85°C).
Secondary Substitutes (Discontinued or Obsolete Status):
74HC244PW,112 (Nexperia USA Inc.) is designated as obsolete but remains available with 994 pcs in stock. This part offers extended operating temperature range (-40°C ~ 125°C) and is suitable only when primary substitutes are unavailable.
MM74HC244MTC (Fairchild Semiconductor) is a parametric equivalent with active product status, available in bulk format with 1,638 pcs in stock. This part maintains identical electrical specifications and operating temperature range (-40°C ~ 85°C).
SN74HC241PW (Texas Instruments) is a parametric equivalent from the same manufacturer as the original part but is discontinued at DiGi Electronics. This part is available in tube format with 2,044 pcs in stock.
Compliance Considerations:
All recommended substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings where specified. Parts sourced from onsemi and NXP Semiconductors offer the most robust compliance documentation and active product status.
Frequently Asked Questions (FAQ)
Q: Can I use MC74HC244ADTR2G as a direct replacement for SN74HC244PW?
A: Yes. MC74HC244ADTR2G meets all critical electrical parameters: 2-element, 4-bit per element non-inverting buffer with 3-state output, 7.8mA output current, 2V to 6V supply voltage, and 20-TSSOP surface mount package. The extended operating temperature range (-55°C ~ 125°C) exceeds the original specification (-40°C ~ 85°C), providing additional thermal margin. The primary difference is packaging format: MC74HC244ADTR2G is supplied in Tape & Reel format versus the original Tube format.
Q: What is the difference between MC74HC244ADTG and MC74HC244ADTR2G?
A: Both parts are manufactured by onsemi and share identical electrical specifications and operating temperature range (-55°C ~ 125°C). The difference is packaging format: MC74HC244ADTG is supplied in Tube format (737 pcs available), while MC74HC244ADTR2G is supplied in Tape & Reel format (16,612 pcs available). Tape & Reel format is preferred for automated assembly and high-volume production.
Q: Why is 74HC244PW,118 recommended despite being from a different manufacturer?
A: 74HC244PW,118 from NXP Semiconductors maintains all critical electrical parameters identical to SN74HC244PW and offers active product status with 3,637 pcs in inventory. The extended operating temperature range (-40°C ~ 125°C) provides additional design margin. NXP is a major semiconductor manufacturer with established supply chain reliability.
Q: Can I substitute SN74HC241PW for SN74HC244PW?
A: SN74HC241PW is a parametric equivalent with identical electrical specifications and package type. However, it is discontinued at DiGi Electronics and based on a different base product number (74HC241 versus 74HC244). This part should be used only when primary substitutes are unavailable. Verify pin configuration compatibility with your specific application before implementation.
Q: What packaging formats are available for these substitutes?
A: Substitutes are available in three packaging formats: Tube (MC74HC244ADTG, 74HC244PW,112, SN74HC244PW, SN74HC241PW), Tape & Reel (MM74HC244MTCX, MC74HC244ADTR2G), and Bulk (74HC244PW,118, MM74HC244MTC). Tape & Reel format is standard for automated assembly. Tube and Bulk formats are used for manual assembly or specific procurement requirements.
Q: Are all substitutes ROHS3 compliant?
A: ROHS3 compliance is confirmed for SN74HC244PW, MM74HC244MTCX, 74HC244PW,112, MC74HC244ADTG, MC74HC244ADTR2G, and SN74HC241PW. Compliance status is not specified in the provided data for 74HC244PW,118 and MM74HC244MTC. Verify compliance documentation with your supplier if ROHS3 certification is required for your application.
Q: What is the moisture sensitivity level for these parts?
A: MSL Level 1 (Unlimited) is confirmed for SN74HC244PW, MM74HC244MTCX, 74HC244PW,112, 74HC244PW,118, MC74HC244ADTG, MC74HC244ADTR2G, and SN74HC241PW. This rating indicates no moisture sensitivity restrictions and unlimited shelf life under standard storage conditions. MSL status is not specified for MM74HC244MTC.
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