BD49L59G-TL Equivalent & Substitute Parts

Part Overview

The BD49L59G-TL is a voltage supervisor IC from Rohm Semiconductor designed for single-channel voltage monitoring applications. This component functions as a voltage detector with push-pull, totem pole output configuration and active-low reset functionality. The device is classified as not for new designs, making identification of equivalent alternatives essential for ongoing production support, maintenance applications, and legacy system repairs where continued supply of the original part may be constrained.

Substiute Parts

BD49L59G-TL

Rohm SemiconductorIn Stock: 4078BD49L59G-TL Datasheet

Current PartRFQ

BD49K59G-TL

Rohm SemiconductorIn Stock: 3618BD49K59G-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BD49L59G-TL is determined by strict equivalence across the following critical parameters:

• Voltage threshold: 5.9V
• Output type: Push-Pull, Totem Pole configuration
• Reset polarity: Active Low
• Number of monitored channels: 1
• Package: 3-SSOP (TO-236-3, SC-59, SOT-23-3)
• Operating temperature range: -40°C ~ 105°C
• Compliance certifications: ROHS3, REACH Unaffected

The BD49K59G-TL meets all these criteria and is classified as a parametric equivalent. Both parts belong to the Rohm Semiconductor supervisor IC family and share identical electrical and mechanical specifications, differing only in their internal series designation (BD49L versus BD49K).

Parameter Comparison

Engineering Selection Recommendations

Both the BD49L59G-TL and BD49K59G-TL are classified as not for new designs by Rohm Semiconductor. Selection between these parts should be based on current inventory availability and supply chain considerations rather than technical differentiation, as they are parametric equivalents with identical electrical and mechanical specifications.

For applications requiring this voltage supervisor functionality in new designs, evaluation of current-generation alternatives from Rohm Semiconductor or other manufacturers is recommended to ensure long-term supply security and access to updated product support.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. The 3-SSOP package and surface mount configuration are standard for this device class and support automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can BD49K59G-TL be used as a direct replacement for BD49L59G-TL?

A: Yes. Both parts are parametric equivalents with identical voltage threshold (5.9V), output configuration (push-pull, totem pole), reset polarity (active low), operating temperature range (-40°C ~ 105°C), and package specifications (3-SSOP, TO-236-3, SC-59, SOT-23-3). No circuit modifications are required for substitution.

Q: What determines whether a part can substitute for the BD49L59G-TL?

A: Substitution is determined by equivalence across voltage threshold, output type, reset polarity, number of monitored channels, package type, operating temperature range, and compliance certifications. Any deviation in these parameters disqualifies a part as a direct substitute.

Q: Are there any differences in pin configuration between these parts?

A: No. Both the BD49L59G-TL and BD49K59G-TL use the 3-SSOP package with identical pin assignments and functional pinout.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates that Rohm Semiconductor is not recommending these parts for new product development. Existing applications using these parts may continue to source them for maintenance and production support, but new designs should evaluate alternative supervisor IC options.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the BD49L59G-TL and BD49K59G-TL are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for industrial applications.

Q: What is the moisture sensitivity level, and why does it matter?

A: Both parts have MSL 3 (168 Hours), indicating they can be exposed to moisture for up to 168 hours at specified humidity levels before soldering. This affects storage, handling, and shelf-life management in manufacturing environments.