SN74ALS245ANS Equivalent & Substitute Parts

Part Overview

The SN74ALS245ANS is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments. This device functions as a 1-element, 8-bit per element transceiver with 3-state output capability, designed for digital signal buffering and bus interface applications. The SN74ALS245ANS carries a Last Time Buy product status, indicating that the original part number is being phased out. Identifying functionally equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this component.

Substiute Parts

SN74ALS245ANS

Texas InstrumentsIn Stock: 2357SN74ALS245ANS Datasheet

Current PartRFQ

SN74ALS245A-1NSR

Texas InstrumentsIn Stock: 2578SN74ALS245A-1NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS245ANS is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State

Electrical Parameters:

• Current - Output High: 15 mA
• Current - Output Low: 24 mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)

Physical Parameters:

• Package / Case: 20-SOIC (0.209", 5.30mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute part SN74ALS245A-1NSR maintains identical functional, electrical, and physical specifications. The primary distinction is product status: SN74ALS245A-1NSR is Active, whereas SN74ALS245ANS is Last Time Buy. The packaging format differs (Tape & Reel versus standard packaging), but the component itself and its electrical characteristics remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS245A-1NSR is the direct substitute for the SN74ALS245ANS. Both components are manufactured by Texas Instruments and share identical electrical, functional, and physical specifications. The SN74ALS245A-1NSR maintains Active product status, ensuring continued availability and supply chain support, whereas the SN74ALS245ANS is designated Last Time Buy.

Both parts are ROHS3 Compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, meeting equivalent environmental and regulatory requirements. The 20-SOIC surface mount package is identical between both parts, allowing direct PCB layout compatibility without redesign.

Selection of SN74ALS245A-1NSR is appropriate for new designs and production transitions from the Last Time Buy SN74ALS245ANS, as it provides equivalent performance with assured long-term availability.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS245A-1NSR be used as a direct replacement for SN74ALS245ANS?

A: Yes. Both parts are functionally and electrically identical. They share the same logic type (non-inverting transceiver), bit configuration (1 element, 8 bits per element), output type (3-state), current ratings (15 mA high, 24 mA low), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and package format (20-SOIC). No circuit modifications are required.

Q: What is the difference between SN74ALS245ANS and SN74ALS245A-1NSR?

A: The primary difference is product status. SN74ALS245ANS is Last Time Buy, indicating phase-out. SN74ALS245A-1NSR is Active, ensuring continued manufacturing and availability. The packaging format differs (standard versus Tape & Reel), but the component specifications and performance are identical.

Q: Are both parts compatible with the same PCB layout?

A: Yes. Both parts use the identical 20-SOIC (0.209", 5.30mm Width) surface mount package. PCB footprints, pin assignments, and mounting requirements are identical. No layout modifications are necessary.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN74ALS245ANS and SN74ALS245A-1NSR are ROHS3 Compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. They meet equivalent environmental and regulatory requirements.

Q: Why is SN74ALS245ANS designated Last Time Buy?

A: Last Time Buy status indicates that the manufacturer is phasing out this part number. Customers are advised to transition to the active equivalent, SN74ALS245A-1NSR, to ensure continued supply chain access and support.