BU45K232G-TL Equivalent & Substitute Parts

Part Overview

The BU45K232G-TL is a single-channel voltage supervisor IC manufactured by Rohm Semiconductor, designed for power management applications requiring voltage detection and reset signal generation. This device operates as an open drain or open collector output supervisor with a 2.3V threshold and 120ms minimum reset timeout. The part is classified as "Not For New Designs," which necessitates identification of active alternative components that maintain functional and electrical compatibility for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Type	Voltage Detector / Supervisor
Number of Voltages Monitored	1
Voltage Threshold	2.3V
Output Configuration	Open Drain or Open Collector
Reset Logic	Active Low
Reset Timeout	120ms Minimum
Operating Temperature Range	-40°C to 105°C
Package Type	TO-236-3 / SC-59 / SOT-23-3
Mounting Type	Surface Mount
Supplier Device Package	3-SSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the BU45K232G-TL is determined by strict equivalence across the following critical parameters:

Voltage Threshold: 2.3V (exact match required)
Number of Channels: 1 channel (single-channel supervision only)
Output Type: Open Drain or Open Collector configuration
Reset Behavior: Active Low reset with 120ms minimum timeout
Operating Temperature Range: -40°C to 105°C
Package Compatibility: TO-236-3 / SOT-23-3 / 3-SSOP form factor
Electrical Compliance: ROHS3 and REACH compliance maintained

The BU45L232G-TL qualifies as a parametric equivalent based on identical electrical specifications, identical package footprint, and maintained compliance certifications. The primary distinction is product lifecycle status: the BU45K232G-TL is designated "Not For New Designs," while the BU45L232G-TL maintains "Active" status, making it the recommended substitute for new production and long-term availability.

Parameter Comparison

Parameter	BU45K232G-TL (Main Part)	BU45L232G-TL (Substitute)
Manufacturer	Rohm Semiconductor	Rohm Semiconductor
Type	Voltage Detector	Voltage Detector
Number of Voltages Monitored	1	1
Voltage Threshold	2.3V	2.3V
Output	Open Drain or Open Collector	Open Drain or Open Collector
Reset	Active Low	Active Low
Reset Timeout	120ms Minimum	120ms Minimum
Operating Temperature	-40°C to 105°C	-40°C to 105°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	3-SSOP	3-SSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Not For New Designs	Active

Engineering Selection Recommendations

The BU45L232G-TL is the direct substitute for the BU45K232G-TL based on complete electrical and mechanical equivalence. Selection criteria are:

For Existing Designs: The BU45K232G-TL may continue to be used where existing inventory is available, provided supply chain continuity is confirmed with the distributor.

For New Production and Long-Term Applications: The BU45L232G-TL is the appropriate selection. This part maintains identical electrical specifications, package footprint, and compliance certifications while offering active product status and confirmed availability (11,263 pcs in stock versus 3,112 pcs for the legacy part).

Compliance Assurance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across manufacturing regions.

Frequently Asked Questions (FAQ)

Q: Can the BU45L232G-TL be used as a direct replacement for the BU45K232G-TL in existing circuit designs?

A: Yes. The BU45L232G-TL is a direct pin-for-pin and functionally equivalent substitute. No circuit modifications are required. Both parts share identical voltage threshold (2.3V), output configuration (open drain/open collector), reset behavior (active low, 120ms minimum), operating temperature range (-40°C to 105°C), and package footprint (SOT-23-3 / 3-SSOP).

Q: What is the difference between the BU45K and BU45L series?

A: The BU45K232G-TL and BU45L232G-TL are functionally identical voltage supervisors from Rohm Semiconductor. The primary difference is product lifecycle designation: the BU45K series is marked "Not For New Designs," while the BU45L series maintains "Active" status. Both series are part of the BU45Kxxx and BU45Lxxx families respectively.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the identical TO-236-3 / SC-59 / SOT-23-3 package with 3-SSOP supplier device package configuration. Pinout and footprint are identical, enabling direct PCB substitution without layout modifications.

Q: Which part should be specified for new product designs?

A: The BU45L232G-TL should be specified for new designs. This part carries active product status and confirmed long-term availability, whereas the BU45K232G-TL is designated "Not For New Designs" and represents a legacy component.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the BU45K232G-TL and BU45L232G-TL are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for EU and global markets.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message