Toshiba Semiconductor and Storage TC7MPB9307FK(EL)

Overview

TC7MPB9307FK(EL) from Toshiba Electronic Devices & Storage Corporation is an 8-bit dual-supply CMOS bus switch enabling bidirectional level translation between VCCA (1.65–5.0 V) and VCCB (2.3–5.5 V), with 5.0 Ω typical ON-resistance, 5.5 V-tolerant OE input, and VSSOP-20 package. It serves as a voltage-isolated interface in mixed-voltage digital systems such as FPGA-to-ASIC interconnects.

For engineers reviewing the TC7MPB9307FK(EL) datasheet, TC7MPB9307FK(EL) pinout, TC7MPB9307FK(EL) application, or TC7MPB9307FK(EL) equivalent, key selection criteria include verified dual-supply operating ranges, guaranteed ON-resistance at multiple VCCA/VCCB combinations, OE power-down protection, and US20 package thermal and routing constraints.

Technical Context

The TC7MPB9307FK(EL) implements an 8-channel n-MOSFET-based analog switch architecture with independent VCCA and VCCB rails, supporting level-shifting without direction control logic. Its OE input is referenced to VCCA but tolerates up to 5.5 V regardless of supply state, enabling safe operation during power sequencing.

All eight channels operate simultaneously under a single OE signal; no internal logic or latching is present. Bidirectional signal flow relies on external pull-up resistors tied to either VCCA or VCCB, and the device imposes no restriction on relative magnitude between An and Bn voltages-only that VCCA < VCCB per operating specification.

Key Specifications

Pinout & Package

VSSOP-20 (US20) package: 4.4 mm × 2.9 mm footprint, 0.5 mm pitch, 0.6 mm max height, 0.03 g mass. Exposed pad not present; standard JEDEC-compliant leadframe.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply bus switch applications.

Compared with SN74AVCH8T245RHLR and PI4ULS3V502AQ, the TC7MPB9307FK(EL) uniquely guarantees sub-5 Ω ON-resistance across full 1.65–5.0 V / 2.3–5.5 V operating ranges and includes 5.5 V-tolerant OE with power-down protection - critical for industrial power-sequencing reliability.

Availability

TC7MPB9307FK(EL) is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA-to-microcontroller interfacing, and automotive infotainment backplanes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for TC7MPB9307FK(EL) includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Toshiba Electronic Devices & Storage Corporation designs high-reliability semiconductor components for industrial, automotive, and computing applications, with emphasis on power efficiency, signal integrity, and long-lifecycle support.

The TC7MPB9307FK(EL) belongs to Toshiba's TC7MPB series of dual-supply bus switches, engineered specifically for voltage-domain bridging in mixed-supply digital systems where low RON, wide voltage flexibility, and OE robustness are mandatory.

FAQ

What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of the TC7MPB9307FK(EL)?

The TC7MPB9307FK(EL) requires VCCA to be strictly less than VCCB per its operating specification (Note 1 in Section 10). While absolute maximum ratings allow both supplies up to 7.0 V, functional operation is only guaranteed when VCCA < VCCB - for example, 3.3 V on VCCA and 5.0 V on VCCB. Exceeding this constraint risks reverse conduction and undefined switching behavior in the TC7MPB9307FK(EL).

Does the TC7MPB9307FK(EL) support level translation from 5.0 V down to 1.8 V?

No - the TC7MPB9307FK(EL) does not support VCCA = 5.0 V and VCCB = 1.8 V. Its operating specification mandates VCCA < VCCB, and VCCA minimum is 1.65 V while VCCB minimum is 2.3 V. Down-translation (5.0 V → 1.8 V) would violate both the VCCA < VCCB rule and the VCCB lower limit; the TC7MPB9307FK(EL) is designed exclusively for up-translation or same-level switching within its defined dual-supply window.

Can the OE pin of the TC7MPB9307FK(EL) be driven directly from a 5 V microcontroller GPIO while VCCA is powered at 1.8 V?

Yes - the OE input of the TC7MPB9307FK(EL) is explicitly rated for 5.5 V tolerance and includes power-down protection. This allows direct connection to a 5 V logic output even when VCCA is at 1.8 V, eliminating the need for external level-shifting circuitry on the enable line and simplifying power sequencing in multi-rail systems using the TC7MPB9307FK(EL).

What is the typical ON-capacitance per channel of the TC7MPB9307FK(EL), and how does it affect high-speed signal integrity?

The TC7MPB9307FK(EL) exhibits 14 pF typical ON-capacitance per switch channel (Section 12.4). Combined with its 5.0 Ω typical RON, this yields a 70 ps RC time constant - preserving signal rise/fall times below 100 ps for edges up to ~3.5 GHz. This ensures minimal distortion on DDR, PCIe, or high-speed sensor data lines routed through the TC7MPB9307FK(EL).

Is the TC7MPB9307FK(EL) pin-compatible with earlier Toshiba bus switches like the TC7WBP08FU?

No - the TC7MPB9307FK(EL) is not pin-compatible with TC7WBP08FU. The TC7MPB9307FK(EL) uses a 20-pin VSSOP (US20) package with dedicated VCCA, VCCB, and GND pins distributed across the perimeter, whereas TC7WBP08FU uses an 8-pin US8 package with shared VCC and GND. Pin mapping, channel count (8 vs. 2), and supply architecture differ fundamentally between the two devices.