Toshiba Semiconductor and Storage TC7MBL3257CFT(EL)

Overview

TC7MBL3257CFT(EL) from Toshiba Electronic Devices & Storage Corporation is a low-voltage, low-capacitance 4-bit 1-of-2 multiplexer/demultiplexer IC operating from 1.65 V to 3.6 V, featuring 8.5 Ω typical ON-resistance and 8 pF typical ON-capacitance at VCC = 3.0 V, used for signal routing in portable battery-powered logic interfaces and high-speed data path selection.

For engineers reviewing the TC7MBL3257CFT(EL) datasheet, TC7MBL3257CFT(EL) pinout, TC7MBL3257CFT(EL) application, or TC7MBL3257CFT(EL) equivalent, key selection criteria include supply voltage range, ON-resistance matching, channel count, output enable behavior, and VSSOP16 package compatibility with space-constrained PCB layouts.

Technical Context

The TC7MBL3257CFT(EL) integrates four independent bidirectional analog/digital switches, each with shared select (S) and output enable (OE) control lines. Its CMOS silicon monolithic construction enables rail-to-rail signal switching with minimal propagation delay due to low RON and CI/O.

All inputs feature ESD protection circuits, and power-down input protection ensures safe operation during power sequencing. The device enters high-impedance state when OE is high, regardless of S state - critical for bus isolation in multi-source systems.

Key Specifications

Pinout & Package

TC7MBL3257CFT(EL) is housed in a 16-pin VSSOP (US16) package measuring 3.6 mm × 2.8 mm × 0.8 mm, optimized for high-density routing and thermal performance in compact portable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multiplexer/demultiplexer applications.

Compared with SN74CBTLV3257RGYR and 74LVC1G3157GW,125, the TC7MBL3257CFT(EL) delivers balanced low-voltage operation, integrated power-down protection, and compact 16-pin VSSOP packaging - making it optimal for space-constrained, battery-operated systems requiring robust power sequencing behavior.

Availability

TC7MBL3257CFT(EL) is available at Aetrix Electronics and suitable for portable consumer electronics, industrial sensor nodes, and FPGA-based embedded controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for TC7MBL3257CFT(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 solutions for industrial, automotive, and consumer applications, with emphasis on low-power analog and logic ICs.

The TC7MBL3257CFT(EL) belongs to Toshiba's TC7MBL series of low-voltage CMOS multiplexers, engineered specifically for signal integrity preservation and power sequencing resilience in portable and battery-sensitive systems.

FAQ

What is the maximum recommended operating frequency for analog signals routed through TC7MBL3257CFT(EL)?

The TC7MBL3257CFT(EL) supports analog signal routing up to approximately 100 MHz, determined by its 8.5 Ω typical ON-resistance and 8 pF typical ON-capacitance, which yield an RC time constant of ~68 ps. Measured propagation delay remains below 11 ns across 1.8–3.3 V supplies, confirming suitability for USB 2.0 and low-speed LVDS applications. For precise bandwidth validation, refer to the RON–VIS curve in Figure 13.1 of the TC7MBL3257CFT(EL) datasheet.

Does TC7MBL3257CFT(EL) support rail-to-rail analog signal switching?

Yes, the TC7MBL3257CFT(EL) supports rail-to-rail analog signal switching across its full specified supply range (1.65 V to 3.6 V). Its CMOS transmission gate architecture allows input voltages from GND to VCC on all I/O pins (A, B1, B2) without damage or distortion, provided VS remains within –0.5 V to VCC + 0.5 V per absolute maximum ratings. This enables direct interfacing with sensors, DACs, and ADCs operating at the same supply rail.

How does the output enable (OE) pin behave when held high on TC7MBL3257CFT(EL)?

When OE is held high (logic "H"), all four channels of the TC7MBL3257CFT(EL) enter a high-impedance state regardless of the S pin state - effectively disconnecting A from both B1 and B2 terminals. This behavior provides robust bus isolation during system sleep modes or fault conditions. The high-Z state is guaranteed by design, with OFF-state leakage current limited to ±1.0 µA max across –40 °C to +85 °C.

Is TC7MBL3257CFT(EL) compatible with 1.8 V logic families such as LVC or AVC?

Yes, the TC7MBL3257CFT(EL) is fully compatible with 1.8 V logic families. Its VIH threshold is 0.7 × VCC (≥1.26 V at VCC = 1.8 V), and VIL is 0.3 × VCC (≤0.54 V), ensuring reliable recognition of 1.8 V LVC/AVC outputs. Input leakage remains ≤±1.0 µA, and propagation delays stay below 11 ns at 1.8 V, meeting timing requirements for synchronous multiplexing in FPGA and microcontroller I/O expansion.

What package variant does TC7MBL3257CFT(EL) use, and is it footprint-compatible with other Toshiba multiplexers?

The TC7MBL3257CFT(EL) uses the VSSOP16 (US16) package - a 3.6 mm × 2.8 mm, 0.5 mm pitch, 16-pin thin shrink small-outline package. It shares identical mechanical dimensions and pinout with the TC7MBL3257CFK and TC7MBL3257CFT, enabling drop-in replacement across this family. The "EL" suffix denotes tape-and-reel packaging for automated assembly, not a physical variant.