74ACT16373SSCX Equivalent & Substitute Parts

Part Overview

The 74ACT16373SSCX is a D-Type Transparent Latch IC manufactured by onsemi, featuring dual 8:8 channel configuration with tri-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 48-BSSOP surface mount package.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ACT16373SSCX
Manufacturer	onsemi
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Independent Circuits	2
Output Type	Tri-State
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Delay Time - Propagation	5.3ns
Current - Output High, Low	24mA, 24mA
Package / Case	48-BSSOP (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 74ACT16373SSCX are qualified based on the following critical parameters that must remain constant across all alternatives:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Independent Circuits: 2
Output Type: Tri-State
Voltage - Supply: 4.5V ~ 5.5V
Package / Case: 48-BSSOP (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Moisture Sensitivity Level (MSL): 1 (Unlimited)

The following substitute parts maintain these core electrical and mechanical specifications and are therefore functionally equivalent for direct replacement applications.

Parameter Comparison

Parameter	74ACT16373SSCX (onsemi)	74ACT16373DL (TI)	74ACT16373DLR (TI)	SN74ACT16373QDLREP (TI)
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
Independent Circuits	2	2	2	2
Output Type	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Delay Time - Propagation	5.3ns	9.3ns	9.3ns	9.3ns
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	16mA, 16mA
Package / Case	48-BSSOP (0.295", 7.50mm Width)	48-BSSOP (0.295", 7.50mm Width)	48-BSSOP (0.295", 7.50mm Width)	48-BSSOP (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the 74ACT16373SSCX, the following selection criteria apply based on product status and compliance:

74ACT16373DLR (Texas Instruments) is the primary recommended substitute. This part maintains active product status, offers ROHS3 compliance, and is available in Tape & Reel packaging suitable for high-volume production environments. The propagation delay of 9.3ns and output current specifications of 24mA remain within acceptable operating parameters for most legacy applications.

SN74ACT16373QDLREP (Texas Instruments) provides an extended operating temperature range of -40°C to 125°C, making it suitable for applications requiring enhanced thermal performance. Output current is specified at 16mA, which may require circuit-level evaluation in current-sensitive applications. This part maintains active status and ROHS3 compliance.

74ACT16373DL (Texas Instruments) carries Last Time Buy status, indicating limited future availability. This part is suitable for immediate replacement needs but should not be selected for new long-term procurement strategies.

Frequently Asked Questions (FAQ)

Q: Can the 74ACT16373DLR directly replace the 74ACT16373SSCX without circuit modification?

A: Yes. Both parts share identical logic type, circuit configuration, output type, supply voltage range, package specification, and mounting type. The 9.3ns propagation delay of the substitute is within acceptable tolerance for most applications designed around the original 5.3ns specification.

Q: What is the difference between 74ACT16373DL and 74ACT16373DLR?

A: Both parts are manufactured by Texas Instruments and share identical electrical specifications. The primary difference is packaging: 74ACT16373DL is supplied in Tube packaging, while 74ACT16373DLR is supplied in Cut Tape and Digi-Reel formats. Selection depends on procurement volume and assembly line requirements.

Q: Is SN74ACT16373QDLREP suitable for applications with temperature extremes?

A: The SN74ACT16373QDLREP extends the upper operating temperature limit to 125°C compared to 85°C for other variants. Applications requiring operation above 85°C should specify this part. The output current specification of 16mA should be evaluated against circuit load requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (74ACT16373DL, 74ACT16373DLR, and SN74ACT16373QDLREP) are specified as ROHS3 compliant. The original 74ACT16373SSCX does not specify RoHS status.

Q: What is the MSL rating and why does it matter?

A: All parts, including the original and substitutes, carry MSL 1 (Unlimited) rating. This indicates unlimited shelf life without moisture bake-out requirements, simplifying inventory management and reducing handling constraints.

Q: Can I use these parts interchangeably in existing PCB designs?

A: Yes. All substitute parts use the identical 48-BSSOP package with 0.295" width and 7.50mm height. PCB footprints, solder reflow profiles, and assembly processes require no modification.

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