74ACT16657DL Equivalent & Substitute Parts

Part Overview

The 74ACT16657DL is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element and 3-state output capability in a 56-SSOP surface mount package. This component operates within the 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The part is currently classified as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Key Parameters

Parameter	Specification
Logic Type	Transceiver, Non-Inverting
Number of Elements	2
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	56-BSSOP (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT16657DL is determined by strict parametric equivalence across the following critical criteria:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 24mA, 24mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 56-BSSOP (0.295", 7.50mm Width)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed below meet these exact specifications and are therefore functionally and mechanically interchangeable with the 74ACT16657DL in applications requiring these parameters.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Logic Type	Elements / Bits	Output Type	Current (mA)	Voltage (V)	Temp Range (°C)	Package	Inventory (Pcs)
74ACT16657DL	Texas Instruments	74ACT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1171
74ACT16652DL	Texas Instruments	74ACT	Last Time Buy	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1048
74ACT16543DL	Texas Instruments	74ACT	Last Time Buy	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1332
74ACT16646DL	Texas Instruments	74ACT	Last Time Buy	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	4802
74ACT16651DL	Texas Instruments	74ACT	Active	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1048
CY74FCT162543CTPVC	Texas Instruments	74FCT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	821
CY74FCT162543TPVC	Texas Instruments	74FCT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	839
CY74FCT162646ATPVC	Texas Instruments	74FCT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1202
CY74FCT162646CTPVC	Texas Instruments	74FCT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1247
CY74FCT162652ATPVC	Texas Instruments	74FCT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1095
CY74FCT162952BTPVC	Texas Instruments	74FCT	Obsolete	Non-Inverting	2 / 8	3-State	24 / 24	4.5 ~ 5.5	-40 ~ 85	56-BSSOP	1103

Engineering Selection Recommendations

For applications currently using the 74ACT16657DL, the following selection criteria apply based on product lifecycle status and regulatory compliance:

Preferred Substitutes (Active or Last Time Buy Status):

74ACT16651DL: Currently in active production status, ensuring long-term availability and supply chain stability. ROHS3 compliant with unlimited moisture sensitivity rating.
74ACT16646DL: Last Time Buy status with highest inventory availability (4802 pcs), suitable for immediate procurement needs. ROHS3 compliant.
74ACT16652DL and 74ACT16543DL: Last Time Buy status with adequate inventory levels (1048 and 1332 pcs respectively).

Alternative Substitutes (Obsolete Status):

CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162543CTPVC, CY74FCT162543TPVC, CY74FCT162652ATPVC, CY74FCT162952BTPVC: All 74FCT series parts meet parametric equivalence but carry obsolete product status. These are suitable only when existing inventory is available and long-term procurement is not required.

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16651DL directly replace 74ACT16657DL in my circuit? A: Yes. The 74ACT16651DL meets all parametric requirements: identical logic type (non-inverting transceiver), element count (2), bit configuration (8 bits per element), output type (3-state), current ratings (24mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and package specification (56-BSSOP). The primary advantage is active production status, ensuring continued availability.

Q: What is the difference between 74ACT and 74FCT series substitutes? A: Both series meet the identical parametric specifications required for substitution. The distinction is series designation and product lifecycle status. 74ACT series parts (74ACT16657DL, 74ACT16652DL, 74ACT16543DL, 74ACT16646DL, 74ACT16651DL) are from the ACT logic family, while 74FCT series parts (CY74FCT162543CTPVC, CY74FCT162543TPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, CY74FCT162952BTPVC) are from the FCT logic family. All maintain identical electrical and mechanical parameters.

Q: Are there any inventory considerations for selecting a substitute? A: Yes. 74ACT16646DL offers the highest current inventory (4802 pcs), followed by 74ACT16543DL (1332 pcs) and 74ACT16657DL (1171 pcs). For immediate procurement, 74ACT16646DL provides the best availability. For long-term projects, 74ACT16651DL (active status) is recommended despite lower current inventory.

Q: Do all substitutes have the same package dimensions? A: Yes. All substitute parts use the 56-BSSOP package with identical dimensions (0.295" width, 7.50mm width specification). Surface mount compatibility is maintained across all listed alternatives.

Q: Are there compliance or certification differences between substitutes? A: No. All substitute parts maintain identical ROHS3 compliance status and unlimited moisture sensitivity level (MSL 1). REACH status is unaffected for all parts, and ECCN classification remains EAR99 across the 74ACT series. 74FCT series parts maintain the same compliance profile with one exception: CY74FCT162952BTPVC carries HTSUS code 8542.39.0060 versus 8542.39.0001 for other parts, reflecting tariff classification differences only.

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