SN74HC4040ANS Equivalent & Substitute Parts

Part Overview

The SN74HC4040ANS is a 12-bit binary counter logic integrated circuit manufactured by Texas Instruments. This device functions as a negative edge-triggered counter with asynchronous reset capability, operating across a supply voltage range of 2 V to 6 V and supporting count rates up to 33 MHz. The part is packaged in a 16-SOIC surface mount configuration.

The SN74HC4040ANS carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production and sales of this specific packaging variant. This status necessitates identification of equivalent substitute parts to ensure continued design support and procurement availability for new production builds and field replacements.

Substiute Parts

SN74HC4040ANS

Texas InstrumentsIn Stock: 949SN74HC4040ANS Datasheet

Current PartRFQ

SN74HC4040ANSR

Texas InstrumentsIn Stock: 3168SN74HC4040ANSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC4040ANS is determined by strict equivalence across the following critical parameters:

Functional Parameters: Logic type (Binary Counter), bit width (12 Bit), counting direction (Up), trigger mechanism (Negative Edge), and reset configuration (Asynchronous) must remain identical.

Electrical Parameters: Supply voltage range (2 V ~ 6 V), count rate capability (33 MHz), and operating temperature range (-40°C ~ 85°C) must be maintained or exceeded.

Physical Parameters: Package type (16-SOIC with 0.209" width, 5.30mm) and mounting technology (Surface Mount) must be identical to ensure PCB compatibility without layout redesign.

Compliance Parameters: RoHS3 compliance and MSL rating (1 - Unlimited) must be preserved for manufacturing and environmental requirements.

The substitute part SN74HC4040ANSR maintains all functional, electrical, and physical equivalence to the SN74HC4040ANS. The primary distinction is packaging format: the substitute is supplied in Tape & Reel (TR) configuration rather than individual packaging, and carries Active product status rather than Last Time Buy.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC4040ANSR is the direct functional equivalent of the SN74HC4040ANS. Selection between these parts is determined by procurement and manufacturing context rather than technical performance:

For New Production Designs: The SN74HC4040ANSR is the appropriate selection. This part carries Active product status from Texas Instruments, ensuring long-term availability and continued manufacturing support. The Tape & Reel packaging format is standard for high-volume surface mount assembly operations and provides cost efficiency in automated pick-and-place processes.

For Field Replacement or Low-Volume Applications: The SN74HC4040ANS may be selected if existing inventory is available and procurement lead times are critical. However, availability is limited due to Last Time Buy status, and future restocking will not be possible from the manufacturer.

Compliance Considerations: Both parts maintain ROHS3 compliance and MSL rating 1 (Unlimited), satisfying environmental and manufacturing requirements without distinction.

Supply Chain Continuity: The SN74HC4040ANSR provides superior supply chain continuity with 3072 pieces in current inventory compared to the declining inventory of the SN74HC4040ANS. For designs requiring long-term production support, the active status part is the preferred selection.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC4040ANSR be used as a direct replacement for the SN74HC4040ANS in existing designs?

A: Yes. The SN74HC4040ANSR is functionally and electrically identical to the SN74HC4040ANS. Both parts share identical pin configurations, electrical characteristics, and package dimensions (16-SOIC, 0.209" width, 5.30mm). No circuit redesign or PCB layout modification is required for substitution.

Q: What is the difference between the SN74HC4040ANS and SN74HC4040ANSR?

A: The primary differences are packaging format and product status. The SN74HC4040ANS is supplied in standard packaging with Last Time Buy status. The SN74HC4040ANSR is supplied in Tape & Reel (TR) format with Active product status. All functional and electrical parameters are identical.

Q: Why is the SN74HC4040ANS marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this specific packaging variant. Existing inventory will be depleted, and the part will not be restocked. This status necessitates transition to the active equivalent part (SN74HC4040ANSR) for continued design support.

Q: Is Tape & Reel packaging compatible with standard PCB assembly equipment?

A: Yes. Tape & Reel (TR) packaging is the standard format for automated surface mount assembly. The SN74HC4040ANSR in Tape & Reel format is fully compatible with standard pick-and-place equipment and reflow soldering processes used in high-volume manufacturing.

Q: Are there any performance differences between the two parts?

A: No. Both parts operate at identical specifications: 12-bit binary counter, 33 MHz count rate, negative edge trigger, asynchronous reset, 2 V to 6 V supply voltage, and -40°C to 85°C operating temperature range.

Q: What is the inventory status of each part?

A: The SN74HC4040ANS has 845 pieces in current inventory. The SN74HC4040ANSR has 3072 pieces in current inventory. The higher inventory of the active part reflects its ongoing production status.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SN74HC4040ANS and SN74HC4040ANSR are ROHS3 compliant and carry MSL rating 1 (Unlimited), satisfying environmental and manufacturing requirements.