SN74HC244ANS Equivalent & Substitute Parts

Part Overview

The SN74HC244ANS is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments. It features 2 elements with 4 bits per element and 3-state output capability, housed in a 20-SOIC surface mount package. The device operates across a supply voltage range of 2V to 6V and is rated for operating temperatures from -40°C to 85°C.

The SN74HC244ANS carries a Last Time Buy product status, indicating that this specific packaging configuration is being discontinued. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this component.

Substiute Parts

SN74HC244ANS

Texas InstrumentsIn Stock: 1001SN74HC244ANS Datasheet

Current PartRFQ

SN74HC244ANSR

Texas InstrumentsIn Stock: 2148SN74HC244ANSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC244ANS is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic type: Buffer, Non-Inverting
• Number of elements: 2
• Bits per element: 4
• Output configuration: 3-State

Electrical Parameters:

• Output current capability: 7.8mA (high and low)
• Supply voltage range: 2V ~ 6V
• Operating temperature range: -40°C ~ 85°C

Physical Parameters:

• Package type: 20-SOIC
• Package dimensions: 0.209" width (5.30mm)
• Mounting type: Surface Mount

Compliance Parameters:

• RoHS3 compliance
• MSL rating: 1 (Unlimited)

The SN74HC244ANSR qualifies as a direct substitute because it maintains identical functional, electrical, and physical specifications while differing only in packaging format (Tape & Reel versus individual packaging) and product status (Active versus Last Time Buy).

Parameter Comparison

Engineering Selection Recommendations

The SN74HC244ANSR is a direct functional and electrical equivalent to the SN74HC244ANS. Both devices are manufactured by Texas Instruments, maintain identical logic specifications, electrical performance characteristics, and physical package dimensions.

The primary distinction between these parts is packaging format and product lifecycle status. The SN74HC244ANS is designated Last Time Buy, indicating limited future availability. The SN74HC244ANSR maintains Active product status with higher current inventory levels (2130 pieces versus 910 pieces), ensuring sustained supply chain access.

Both parts satisfy ROHS3 compliance requirements and carry MSL rating 1 (Unlimited moisture sensitivity), confirming equivalent environmental and handling specifications.

For new designs or replenishment orders, the SN74HC244ANSR is the appropriate selection due to its Active status and superior inventory availability. Existing designs utilizing the SN74HC244ANS can transition to the SN74HC244ANSR without circuit modification, provided that the Tape & Reel packaging format is compatible with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC244ANSR replace the SN74HC244ANS in existing circuit designs?

A: Yes. The SN74HC244ANSR is electrically and functionally identical to the SN74HC244ANS. Both devices feature identical logic type, element count, bit configuration, output type, current ratings, supply voltage range, and operating temperature specifications. The only differences are packaging format (Tape & Reel versus individual) and product status (Active versus Last Time Buy).

Q: What is the significance of the Last Time Buy status on the SN74HC244ANS?

A: Last Time Buy status indicates that Texas Instruments is discontinuing production of this specific part number. Existing inventory will be sold until depletion, after which the part will no longer be available. The SN74HC244ANSR, with Active status, represents the recommended alternative for continued supply chain access.

Q: Are there any differences in the 20-SOIC package dimensions between these parts?

A: No. Both the SN74HC244ANS and SN74HC244ANSR utilize the identical 20-SOIC package with 0.209" width (5.30mm). Package footprints, pin assignments, and PCB layout requirements are identical.

Q: Does the Tape & Reel packaging of the SN74HC244ANSR affect circuit performance?

A: No. Tape & Reel packaging is a supply format used for automated assembly processes. Once the component is removed from the reel and soldered to the PCB, the device functions identically to individually packaged versions. The internal die and electrical characteristics remain unchanged.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SN74HC244ANS and SN74HC244ANSR are ROHS3 compliant and carry MSL rating 1 (Unlimited), confirming equivalent environmental and regulatory compliance.

Q: What is the base product number for these parts?

A: The base product number is 74HC244. Both the SN74HC244ANS and SN74HC244ANSR are variants of this base product, differentiated by packaging and distribution format.