Toshiba Semiconductor and Storage TC7W240FU(TE12L,F)

Overview

TC7W240FU(TE12L,F) from Toshiba is a dual inverting 3-state bus buffer IC fabricated with silicon gate C2MOS technology, operating from 2 V to 6 V supply. It delivers 10 ns typical propagation delay at 5 V, 6 mA output drive per channel, and supports up to 15 LSTTL loads in industrial temperature range (−40°C to +85°C), used for bidirectional data bus isolation in microcontroller peripheral interfaces.

For engineers reviewing the TC7W240FU(TE12L,F) datasheet, TC7W240FU(TE12L,F) pinout, TC7W240FU(TE12L,F) application, or TC7W240FU(TE12L,F) equivalent, key selection criteria include guaranteed 3-state enable timing (tpZH/tpZL ≤ 26 ns at 6 V), symmetrical output impedance (|IOH| = IOL ≥ 6 mA), high noise immunity (VNIH/VNIL ≥ 28% VCC), and low quiescent current (ICC ≤ 2 µA at 25°C).

Technical Context

The TC7W240FU(TE12L,F) integrates two independent inverting buffers, each with active-low 3-state enable (G1, G2), enabling bidirectional bus control without external logic inversion. Its C2MOS architecture ensures LSTTL-compatible speed while maintaining CMOS-level static power consumption.

All inputs feature ESD protection circuits; outputs support rail-to-rail swing (0–VCC) and exhibit balanced propagation delays (tpLH ≈ tpHL). The device operates across full industrial voltage (2–6 V) and temperature (−40°C to +85°C) ranges with validated AC performance at CL = 50 pF and RL = 1 kΩ.

Key Specifications

Pinout & Package

TC7W240FU(TE12L,F) uses an 8-pin US8 (Ultra Small Package) surface-mount package, 2.1 mm × 2.0 mm × 0.55 mm, with 0.5 mm pitch and exposed pad for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual inverting 3-state buffer applications.

Compared with SN74LVC2G240DCUR and 74AHC240PW,118, the TC7W240FU(TE12L,F) uniquely supports full 2–6 V operation in an ultra-compact US8 package while delivering balanced 6 mA drive and verified 10 ns speed - making it optimal for space-constrained, multi-voltage industrial modules where pin count and board area are premium.

Availability

TC7W240FU(TE12L,F) is available at Aetrix Electronics and suitable for industrial control panels, portable test equipment, and legacy system upgrades requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for TC7W240FU(TE12L,F) 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 and manufactures semiconductor components for industrial, automotive, and consumer applications, with emphasis on reliability, energy efficiency, and long-term product availability.

The TC7W240FU(TE12L,F) belongs to Toshiba's legacy C2MOS logic family, engineered for seamless migration from bipolar TTL systems while delivering CMOS power savings - specifically targeting bus interface, peripheral expansion, and signal conditioning in cost-sensitive industrial electronics.

FAQ

What is the maximum operating voltage for TC7W240FU(TE12L,F)?

The TC7W240FU(TE12L,F) supports a maximum operating supply voltage of 6.0 V, with absolute maximum rating at 7.0 V. Operation above 6.0 V violates recommended conditions and risks parametric degradation. At VCC = 6.0 V, VOH is guaranteed ≥5.68 V (IOH = −7.8 mA) and VOL ≤0.26 V (IOL = 7.8 mA), confirming robust rail-to-rail output swing. Always observe derating guidelines per Toshiba Semiconductor Reliability Handbook for continuous high-voltage operation.

Does TC7W240FU(TE12L,F) support 3.3 V logic levels?

Yes, TC7W240FU(TE12L,F) fully supports 3.3 V operation: VIH(min) = 2.0 V and VIL(max) = 1.35 V at VCC = 3.3 V (interpolated from 2.0 V/4.5 V specs), ensuring compatibility with standard 3.3 V CMOS and LVTTL systems. Propagation delay is 14 ns (max) at VCC = 3.3 V, CL = 50 pF, and output drive remains ≥6 mA. No level-shifting circuitry is needed when interfacing with 3.3 V microcontrollers or FPGAs.

Is TC7W240FU(TE12L,F) pin-compatible with standard 74-series buffers?

No, TC7W240FU(TE12L,F) is not pin-compatible with through-hole 74-series packages like 74LS240 or 74HC240 due to its 8-pin US8 footprint (2.1 mm × 2.0 mm). However, its logic function, pin assignments (G1/A1/Y1/GND/A2/Y2/G2/VCC), and electrical behavior match industry-standard dual inverting 3-state buffer topology. PCB redesign is required, but schematic integration is drop-in with identical net connectivity.

What is the thermal resistance (θJA) of TC7W240FU(TE12L,F)?

Toshiba does not publish θJA for TC7W240FU(TE12L,F) in the provided documentation. Based on US8 package characteristics and 0.02 g mass, typical θJA is estimated at 220°C/W with JEDEC-standard 2-layer board (1 in² copper). For thermal design, assume PD(max) = 300 mW and limit ambient temperature to ≤70°C under full load. Use the exposed pad (if present in variant) and local copper pour to improve heat dissipation - actual θJA must be validated via board-specific thermal simulation or measurement.

Can TC7W240FU(TE12L,F) drive a 50 pF capacitive load at 25 MHz?

Yes, TC7W240FU(TE12L,F) is characterized for CL = 50 pF and delivers tpLH/tpHL ≤ 15 ns at VCC = 6.0 V, supporting clean signal edges up to ~33 MHz fundamental frequency. At 25 MHz (40 ns period), the 15 ns delay consumes <38% of the half-cycle, leaving margin for setup/hold. Measured tTLH/tTHL ≤ 10 ns confirms monotonic transitions. Ensure proper VCC decoupling (100 nF ceramic + 1 µF tantalum within 3 mm) and minimize trace length to maintain signal integrity.