74ACT16373SSC Equivalent & Substitute Parts

Part Overview

The 74ACT16373SSC is a D-Type Transparent Latch IC with 2 independent channels, 8:8 circuit configuration, and tri-state output capability. Manufactured by onsemi in a 48-SSOP surface mount package, this component is classified as obsolete. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Supply Voltage Range	4.5V ~ 5.5V
Independent Circuits	2
Package Type	48-BSSOP (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Current Output (High/Low)	24mA / 24mA
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT16373SSC is determined by the following critical parameters:

Logic Type: D-Type Transparent Latch (must match exactly)
Circuit Configuration: 8:8 (must match exactly)
Output Type: Tri-State (must match exactly)
Supply Voltage Range: 4.5V ~ 5.5V (must match exactly)
Independent Circuits: 2 (must match exactly)
Package Type: 48-BSSOP (must match exactly)
Mounting Type: Surface Mount (must match exactly)
Moisture Sensitivity Level: 1 (Unlimited) (must match exactly)

All three substitute parts meet these core substitution criteria. Variations in propagation delay time, output current ratings, and operating temperature range are within acceptable tolerance for this component category and do not preclude substitution.

Parameter Comparison

Parameter	74ACT16373SSC (onsemi)	74ACT16373DL (TI)	74ACT16373DLR (TI)	SN74ACT16373QDLREP (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Last Time Buy	Active	Active
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State
Supply Voltage Range	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Independent Circuits	2	2	2	2
Propagation Delay Time	5.3ns	9.3ns	9.3ns	9.3ns
Current Output High	24mA	24mA	24mA	16mA
Current Output Low	24mA	24mA	24mA	16mA
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Package Type	48-BSSOP	48-BSSOP	48-BSSOP	48-BSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

74ACT16373DLR (Texas Instruments) is the primary substitute for new production designs. This part carries Active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and available in Tape & Reel packaging, which is standard for high-volume manufacturing. The 48-SSOP package and electrical specifications are identical to the original component.

SN74ACT16373QDLREP (Texas Instruments) is an alternative substitute with extended operating temperature range (-40°C ~ 125°C) compared to the original specification (-40°C ~ 85°C). This part is also Active status and ROHS3 compliant. Output current ratings are reduced to 16mA per channel; this must be evaluated against circuit load requirements. The extended temperature range provides additional operational margin for demanding environments.

74ACT16373DL (Texas Instruments) carries Last Time Buy status, indicating limited remaining availability. This part is suitable only for legacy system maintenance or short-term requirements where supply continuity cannot be guaranteed beyond the Last Time Buy window.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16373DLR directly replace 74ACT16373SSC in existing designs?

A: Yes. The 74ACT16373DLR is electrically and mechanically compatible. Both parts share identical logic type, circuit configuration, output type, supply voltage range, package type, and mounting specifications. The propagation delay difference (5.3ns vs. 9.3ns) and identical output current ratings (24mA) do not affect functional compatibility in standard applications.

Q: What is the difference between 74ACT16373DLR and SN74ACT16373QDLREP?

A: Both parts are functionally equivalent D-Type Transparent Latches with identical core specifications. The primary differences are: (1) SN74ACT16373QDLREP supports extended operating temperature range to 125°C versus 85°C, and (2) SN74ACT16373QDLREP output current is rated at 16mA versus 24mA. Select SN74ACT16373QDLREP only if extended temperature operation is required and circuit loads do not exceed 16mA per channel.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts from Texas Instruments are ROHS3 compliant. The original onsemi part does not specify RoHS status.

Q: What packaging options are available for substitute parts?

A: 74ACT16373DL is supplied in Tube packaging. 74ACT16373DLR is supplied in Cut Tape and Digi-Reel formats. SN74ACT16373QDLREP is supplied in Tape & Reel format. Select packaging based on production volume and assembly requirements.

Q: Is the 48-BSSOP package identical across all parts?

A: Yes. All parts use the 48-BSSOP package with 0.295" width and 7.50mm height. PCB footprints and assembly processes are identical.

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