SN74ABT652DBR Equivalent & Substitute Parts

Part Overview

The SN74ABT652DBR is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, designed for 8-bit bidirectional data transfer with 3-state output capability. Operating within a 4.5V to 5.5V supply voltage range, this device is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing design support, production continuity, and component sourcing in new applications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Series	74ABT
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High	32mA
Current - Output Low	64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	24-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74ABT652DBR is determined by strict equivalence across the following critical parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current Ratings: 32mA (High), 64mA (Low)
Supply Voltage Range: 4.5V ~ 5.5V
Operating Temperature Range: -40°C ~ 85°C
Package: 24-SSOP with identical physical dimensions
Compliance: ROHS3, MSL 1, REACH Unaffected

All identified substitute parts maintain identical electrical and mechanical specifications. The primary distinction lies in product status: the main part is obsolete, while all substitutes are active components. Packaging format differences (Tape & Reel vs. standard packaging) do not affect functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Elements / Bits	Output Type	Supply Voltage	Temp Range	Package	Inventory (Pcs)
SN74ABT652DBR	Texas Instruments	Obsolete	Transceiver, Non-Inverting	1 / 8	3-State	4.5V ~ 5.5V	-40°C ~ 85°C	24-SSOP	1006
SN74ABT543ADBR	Texas Instruments	Active	Transceiver, Non-Inverting	1 / 8	3-State	4.5V ~ 5.5V	-40°C ~ 85°C	24-SSOP	2654
SN74ABT646ADBR	Texas Instruments	Active	Transceiver, Non-Inverting	1 / 8	3-State	4.5V ~ 5.5V	-40°C ~ 85°C	24-SSOP	3040
SN74ABT646DBR	Texas Instruments	Active	Transceiver, Non-Inverting	1 / 8	3-State	4.5V ~ 5.5V	-40°C ~ 85°C	24-SSOP	1092
SN74ABT652ADBR	Texas Instruments	Active	Transceiver, Non-Inverting	1 / 8	3-State	4.5V ~ 5.5V	-40°C ~ 85°C	24-SSOP	861
SN74ABT657ADBR	Texas Instruments	Active	Transceiver, Non-Inverting	1 / 8	3-State	4.5V ~ 5.5V	-40°C ~ 85°C	24-SSOP	2000

Engineering Selection Recommendations

All substitute parts listed maintain full parametric equivalence to the SN74ABT652DBR and are certified to ROHS3 compliance with MSL 1 rating. The primary advantage of substitution is transition from obsolete to active product status, ensuring long-term availability and manufacturing support.

Selection among active alternatives should be based on inventory availability and packaging requirements. SN74ABT646ADBR offers the highest current inventory (3040 units), while SN74ABT657ADBR provides 2000 units. All substitutes are supplied in Tape & Reel packaging format, suitable for automated assembly processes.

The SN74ABT652ADBR represents a direct variant of the original part number, maintaining the base product designation while offering active status. This option provides continuity with the original design intent.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT652ADBR be used as a direct replacement for SN74ABT652DBR?

A: Yes. Both parts share identical electrical specifications, output characteristics, supply voltage range, operating temperature range, and 24-SSOP package dimensions. The primary difference is product status: SN74ABT652ADBR is active while SN74ABT652DBR is obsolete.

Q: What is the significance of the "A" designation in part numbers like SN74ABT652ADBR?

A: The "A" suffix indicates an active product variant within the 74ABT series. This designation does not alter electrical or mechanical parameters but confirms current manufacturing and distribution status.

Q: Are all substitute parts available in the same package format?

A: All substitute parts use the 24-SSOP package with identical physical dimensions (0.209", 5.30mm width). Packaging format differs (Tape & Reel vs. standard), but this does not affect PCB footprint or electrical performance.

Q: What are the output current specifications for these transceiver parts?

A: All listed parts deliver 32mA maximum output current in the high state and 64mA maximum output current in the low state, maintaining identical drive capability across the 8-bit data path.

Q: Are these parts suitable for 5V and 3.3V systems?

A: These parts operate within the 4.5V to 5.5V supply range. They are specified for 5V systems. Operation outside this voltage range is not supported by the provided specifications.

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