UDN2916B Equivalent & Substitute Parts

Part Overview

The UDN2916B is a bipolar motor driver IC manufactured by Allegro MicroSystems, designed for fully integrated control and power stage applications in brushed DC and stepper motor systems. This device operates with a supply voltage range of 4.75V to 5.25V and delivers up to 750mA output current across four half-bridge configurations in a 24-DIP through-hole package.

The UDN2916B is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this driver architecture.

Substiute Parts

UDN2916B

Allegro MicroSystemsIn Stock: 1667UDN2916B Datasheet

Current PartRFQ

TB6562AFG,8,EL

Toshiba Semiconductor and StorageIn Stock: 10413TB6562AFG,8,EL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UDN2916B is evaluated based on the following critical parameters:

• Motor Type Compatibility: Both the main part and substitute must support bipolar motor driving functionality
• Output Configuration: Half-bridge (4) topology must be maintained for equivalent functionality
• Interface Type: Parallel control interface is required for direct pin compatibility
• Fully Integrated Architecture: Control and power stage integration must be preserved
• Voltage Operating Range: Supply and load voltage specifications determine electrical compatibility
• Output Current Capability: Minimum current delivery must meet or exceed application requirements
• Mounting and Package Considerations: Physical form factor affects board integration feasibility

The TB6562AFG,8,EL qualifies as a substitute based on matching motor type support, output configuration, parallel interface, and fully integrated driver architecture. However, differences in supply voltage range, output current capability, technology platform, and mounting type introduce specific design considerations.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The UDN2916B is obsolete, while the TB6562AFG,8,EL is active and in production. Selection of an active component ensures long-term availability and supply chain stability.

Compliance and Certification: The TB6562AFG,8,EL holds ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. The UDN2916B is RoHS non-compliant, which may restrict use in applications subject to environmental regulations.

Supply Voltage Incompatibility: The UDN2916B operates at 4.75V to 5.25V supply, while the TB6562AFG,8,EL requires 10V to 34V supply. Direct substitution without circuit modification is not feasible if the original design relies on 5V supply rails.

Load Voltage Range: The UDN2916B supports load voltages up to 45V, exceeding the TB6562AFG,8,EL maximum of 34V. Applications requiring voltages above 34V cannot use the Toshiba substitute.

Mounting Type Transition: The UDN2916B uses through-hole mounting while the TB6562AFG,8,EL is surface-mount. Board redesign is required for physical integration.

Output Current: The TB6562AFG,8,EL delivers 1.5A, doubling the UDN2916B capability. This provides design margin for current-limited applications.

Frequently Asked Questions (FAQ)

Q: Can the TB6562AFG,8,EL directly replace the UDN2916B on an existing PCB?

A: No. The TB6562AFG,8,EL is a surface-mount component in a 30-SSOP package, while the UDN2916B is through-hole in a 24-DIP package. Physical board redesign is required. Additionally, the supply voltage requirement differs significantly (10V–34V versus 4.75V–5.25V).

Q: What are the key functional similarities between these parts?

A: Both devices are fully integrated bipolar motor drivers with four half-bridge output stages and parallel control interfaces. Both support bipolar stepper and brushed DC motor applications. Both operate across the -20°C to 85°C temperature range (with the UDN2916B extending to 150°C).

Q: Are there supply voltage constraints when considering substitution?

A: Yes. The UDN2916B operates at 4.75V to 5.25V, while the TB6562AFG,8,EL requires 10V to 34V. The supply voltage ranges do not overlap. Circuit redesign to accommodate the higher supply voltage requirement is mandatory for substitution.

Q: Does the TB6562AFG,8,EL support the same load voltage range?

A: No. The UDN2916B supports load voltages from 10V to 45V, while the TB6562AFG,8,EL is limited to 10V to 34V. Applications requiring load voltages above 34V cannot use the Toshiba substitute.

Q: What is the significance of the technology difference (Bipolar versus DMOS)?

A: The UDN2916B uses bipolar technology, while the TB6562AFG,8,EL uses DMOS technology. DMOS typically offers lower on-resistance and improved efficiency, but the two technologies have different electrical characteristics and may require circuit optimization during substitution.

Q: Is the TB6562AFG,8,EL suitable for applications requiring RoHS compliance?

A: Yes. The TB6562AFG,8,EL is ROHS3 compliant. The UDN2916B is RoHS non-compliant, making the Toshiba part the appropriate choice for designs subject to environmental regulations.

Q: What packaging considerations apply to substitution?

A: The UDN2916B is a 24-pin through-hole DIP package suitable for breadboarding and legacy PCB designs. The TB6562AFG,8,EL is a 30-pin surface-mount SSOP package requiring SMT assembly equipment and PCB redesign. Pin count and pinout differences necessitate schematic and layout modifications.