TUSB2140BN Equivalent & Substitute Parts

Part Overview

The TUSB2140BN is a USB 1.1 transceiver IC manufactured by Texas Instruments, housed in a 40-DIP package. This component functions as a 1/1 transceiver for USB 1.1 interface applications with a receiver hysteresis of 700 mV. The product is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity.

Substiute Parts

TUSB2140BN

Texas InstrumentsIn Stock: 787TUSB2140BN Datasheet

Current PartRFQ

TUSB2046BVF

Texas InstrumentsIn Stock: 4228TUSB2046BVF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TUSB2140BN is constrained by the following critical parameters:

Functional Requirements:

• USB protocol compatibility (USB 1.1 minimum)
• Transceiver or hub controller functionality
• 1/1 driver/receiver configuration or equivalent

Electrical Requirements:

• Supply voltage range overlap with 3V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Receiver hysteresis specification: 700 mV

Physical Requirements:

• Package compatibility or board redesign feasibility
• Mounting type (through-hole preferred for direct replacement)

The TUSB2046BVF qualifies as a substitute based on functional equivalence in USB interface control, overlapping voltage specifications (3V ~ 3.6V operates within the lower range of TUSB2140BN), and compatible operating temperature range. However, this substitution involves a package change from 40-DIP to 32-LQFP, requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The TUSB2140BN is obsolete, while the TUSB2046BVF is active and in production. Active product status ensures ongoing availability and manufacturing support.

Compliance Consideration: The TUSB2046BVF meets ROHS3 compliance, whereas the TUSB2140BN is non-compliant. For new designs or production requiring regulatory compliance, the TUSB2046BVF is the appropriate selection.

Functional Upgrade: The TUSB2046BVF implements USB 2.0 protocol, providing backward compatibility with USB 1.1 systems while enabling higher data rate capability. This represents a functional upgrade path.

Implementation Constraint: Direct socket replacement is not possible due to package and mounting type differences (40-DIP through-hole versus 32-LQFP surface mount). PCB redesign is required for implementation of the TUSB2046BVF.

Frequently Asked Questions (FAQ)

Q: Can the TUSB2046BVF directly replace the TUSB2140BN on existing PCBs?

A: No. The TUSB2140BN uses a 40-DIP through-hole package, while the TUSB2046BVF uses a 32-LQFP surface-mount package. PCB layout modification is required.

Q: Are there voltage compatibility issues between these parts?

A: The TUSB2046BVF operates at 3V ~ 3.6V, which is a subset of the TUSB2140BN's 3V ~ 5.25V range. Systems designed for 5V operation require voltage regulation to 3.6V maximum for the substitute part.

Q: What is the functional difference between a transceiver and a hub controller?

A: The TUSB2140BN is a transceiver, handling signal transmission and reception. The TUSB2046BVF is a hub controller, managing multiple USB port connections and device enumeration. The hub controller provides expanded functionality suitable for multi-port applications.

Q: Does the USB 2.0 protocol of the TUSB2046BVF maintain compatibility with USB 1.1 systems?

A: Yes. USB 2.0 is backward compatible with USB 1.1. The TUSB2046BVF can operate in USB 1.1 mode when connected to USB 1.1 hosts or devices.

Q: What is the impact of the supply current specification on the TUSB2046BVF?

A: The TUSB2046BVF specifies 40mA supply current. Design power budgets must account for this requirement. The TUSB2140BN does not provide a specified supply current value in the available data.

Q: Are there moisture sensitivity differences between these parts?

A: Both parts specify MSL 3 (168 Hours), indicating identical moisture sensitivity levels and requiring equivalent handling and storage protocols.