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Toshiba Semiconductor and Storage TC74AC640F(EL,F)

Name: TC74AC640F(EL,F)
Brand: Toshiba Semiconductor and Storage
SKU: TC74AC640F(EL,F)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TC74AC640F(EL,F)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.209", 5.30mm Width)

Datasheet:: TC74AC640F(EL,F).pdf

Description:: IC TXRX INVERT 5.5V 20SOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,015

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Product details

Overview

TC74AC640F(EL,F) from Toshiba Electronic Devices & Storage Corporation is an octal bus transceiver with 3-state inverting output logic, designed for bidirectional asynchronous data bus communication between microcontrollers and peripheral subsystems. It operates across 2.0–5.5 V supply, delivers 24 mA output drive at 4.5 V, achieves 4.8 ns typical propagation delay at 5.0 V, and features high noise immunity (28% VCC min). It is used in industrial control backplanes requiring level-shifted, isolated bus coupling.

For engineers reviewing the TC74AC640F(EL,F) datasheet, TC74AC640F(EL,F) pinout, TC74AC640F(EL,F) application, or TC74AC640F(EL,F) equivalent, key selection criteria include verified 3-state inverting functionality, SOP20 package compatibility, guaranteed 24 mA sink/source capability at 4.5 V, and absolute maximum ratings up to 7.0 V supply-critical for mixed-voltage system interconnect design.

Technical Context

The TC74AC640F(EL,F) implements a dual-bus, direction-controlled transceiver architecture where DIR selects A→B or B→A data flow, and G enables/disables all outputs into high-impedance state. Its C2MOS silicon gate process ensures CMOS-level static power (8.0 µA max ICC) while matching bipolar TTL speed.

All eight I/O pairs support bidirectional signal translation with balanced tPLH/tPHL delays, and each input includes integrated ESD protection. The device requires external pull-up/pull-down resistors on floating bus pins and prohibits signal application to bus terminals during output mode to prevent latch-up.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Inverting octal bus transceiver with 3-state outputs
Propagation Delay	4.8 ns (typ.) at VCC = 5.0 V - enables ≤200 MHz bus handshaking in synchronous systems
Supply Voltage Range	2.0 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic domains without level shifters
Output Drive	±24 mA (min) at VCC = 4.5 V - drives standard 50 Ω transmission lines and fan-out of ≥10 LS-TTL loads
Input Noise Immunity	28% VCC (min) - rejects common-mode noise in electrically noisy industrial environments
Quiescent Current	8.0 µA (max) at Ta = 25 °C - enables low-power standby in battery-backed control modules
Operating Temperature	−40 °C to +85 °C - qualified for extended-temperature industrial automation deployments

Pinout & Package

SOP20 (Small Outline Package, 20-pin, 0.65 mm pitch, 12.8 mm × 7.6 mm body, 0.22 g typical weight).

Pin/Terminal	Circuit Role	Design Meaning
G (Pin 1)	Output enable (active-low)	Asserting low enables all eight transceiver outputs; high forces all outputs into high-impedance state for bus isolation
DIR (Pin 2)	Direction control	Low: A-bus inputs → B-bus outputs (inverted); High: B-bus inputs → A-bus outputs (inverted)
A0–A7 (Pins 3–10)	Port A I/O	Bi-directional data terminals connected to one bus segment; function as inputs or outputs depending on DIR and G state
B0–B7 (Pins 12–19)	Port B I/O	Bi-directional data terminals connected to second bus segment; inverted relative to A-port per transceiver logic
VCC (Pin 20)	Power supply	Primary supply rail (2.0–5.5 V); must be decoupled locally with 0.1 µF ceramic capacitor
GND (Pin 11)	Ground reference	Common return path for all signals and supply; requires low-inductance connection to system ground plane

Key Features

Feature	Design Value
Inverting transceiver logic	Ensures signal polarity inversion across both directions-required for legacy bus architectures like IEEE 1149.1 JTAG TDO/TDI paths
Pin- and function-compatible with 74F640	Enables drop-in replacement in existing designs using 74F640 without PCB or firmware changes
High-speed / low-power C2MOS process	Delivers 3.9 ns typical tpd at 5 V while limiting ICC to 8 µA-ideal for power-constrained real-time controllers
ESD-protected inputs	Withstands ±20 mA input diode current-reduces need for external TVS devices in board-level ESD protection schemes
Wide voltage operation (2.0–5.5 V)	Supports single-supply operation across 3.3 V microcontroller buses and 5 V legacy peripherals without level translators

Applications

Industrial PLC Backplane Interface	Legacy ISA Bus Signal Conditioning
Use Scenario: Isolating and translating signals between CPU-side 3.3 V address/data bus and 5 V I/O module backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional inverting transceiver managing A/B port direction under DIR control and enabling/disabling via G to prevent bus contention during module hot-swap. Use Value: Eliminates need for discrete level shifters and reduces component count by integrating eight matched inverting channels with guaranteed 24 mA drive into SOP20 footprint.	Use Scenario: Interfacing modern low-voltage microcontrollers to vintage ISA expansion slots requiring inverted bus signaling and strict timing compliance. IC Role / Device Role / Timing Role: Octal inverting transceiver providing DIR-controlled data flow and G-gated 3-state isolation to meet ISA bus timing windows and avoid signal reflection. Use Value: Meets 4.8 ns max propagation delay requirement at 5 V and supports 50 Ω transmission line driving-ensuring signal integrity on long ISA traces.
Automotive Body Control Module (BCM) Subsystem Bridge	Test Equipment Digital Pattern Generator
Use Scenario: Coupling CAN controller's 3.3 V GPIO bus to 5 V sensor interface subassembly in non-safety-critical automotive body electronics. IC Role / Device Role / Timing Role: Inverting bus transceiver enabling bidirectional data exchange between domains, with G used for fault-induced bus shutdown and DIR for diagnostic loopback mode. Use Value: −40 °C to +85 °C rating and 28% VCC noise margin ensure reliable operation in under-hood temperature swings and EMI-rich vehicle environments.	Use Scenario: Generating precise, inverted digital stimulus patterns for IC functional testing where channel inversion is required before DUT input. IC Role / Device Role / Timing Role: Programmable inverting transceiver used in pattern generator output stage, with DIR selecting test vector direction and G enabling burst-mode output gating. Use Value: 4.8 ns typical tpd and <10.5 ns max tPHL/tPLH variation guarantee sub-10 ns edge alignment across all eight channels-critical for setup/hold timing validation.

Industrial PLC Backplane Interface

Legacy ISA Bus Signal Conditioning

Use Scenario: Isolating and translating signals between CPU-side 3.3 V address/data bus and 5 V I/O module backplane in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional inverting transceiver managing A/B port direction under DIR control and enabling/disabling via G to prevent bus contention during module hot-swap.

Use Value: Eliminates need for discrete level shifters and reduces component count by integrating eight matched inverting channels with guaranteed 24 mA drive into SOP20 footprint.

Use Scenario: Interfacing modern low-voltage microcontrollers to vintage ISA expansion slots requiring inverted bus signaling and strict timing compliance.

IC Role / Device Role / Timing Role: Octal inverting transceiver providing DIR-controlled data flow and G-gated 3-state isolation to meet ISA bus timing windows and avoid signal reflection.

Use Value: Meets 4.8 ns max propagation delay requirement at 5 V and supports 50 Ω transmission line driving-ensuring signal integrity on long ISA traces.

Automotive Body Control Module (BCM) Subsystem Bridge

Test Equipment Digital Pattern Generator

Use Scenario: Coupling CAN controller's 3.3 V GPIO bus to 5 V sensor interface subassembly in non-safety-critical automotive body electronics.

IC Role / Device Role / Timing Role: Inverting bus transceiver enabling bidirectional data exchange between domains, with G used for fault-induced bus shutdown and DIR for diagnostic loopback mode.

Use Value: −40 °C to +85 °C rating and 28% VCC noise margin ensure reliable operation in under-hood temperature swings and EMI-rich vehicle environments.

Use Scenario: Generating precise, inverted digital stimulus patterns for IC functional testing where channel inversion is required before DUT input.

IC Role / Device Role / Timing Role: Programmable inverting transceiver used in pattern generator output stage, with DIR selecting test vector direction and G enabling burst-mode output gating.

Use Value: 4.8 ns typical tpd and <10.5 ns max tPHL/tPLH variation guarantee sub-10 ns edge alignment across all eight channels-critical for setup/hold timing validation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal inverting transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74F640PC	Bipolar TTL process; higher ICC (25 mA typ), faster tpd (3.5 ns typ), narrower VCC range (4.5–5.5 V)	Requires 5 V only; unsuitable for mixed-voltage or low-power systems	Select when legacy 5 V-only designs demand maximum speed and board space allows higher thermal dissipation
SN74ACT640N	Texas Instruments ACT family; identical logic and pinout; 4.5 ns tpd (typ), 24 mA drive, same VCC range	RoHS-compliant, widely stocked; minor AC parameter variances (<0.3 ns) vs. TC74AC640F	Preferred for new designs needing second-source availability and full RoHS compliance without performance trade-off

Compared with 74F640PC and SN74ACT640N, the TC74AC640F(EL,F) offers superior power efficiency (8 µA ICC vs. 25 mA) and broader supply flexibility (2.0–5.5 V), making it optimal for energy-sensitive or multi-rail embedded systems-while maintaining pin compatibility and functional equivalence for drop-in upgrades.

Availability

TC74AC640F(EL,F) is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive BCM subsystem bridges, and test equipment digital pattern generators requiring stable component supply, long-lifecycle support, and guaranteed SOP20 packaging consistency.

Supply support for TC74AC640F(EL,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 is a Japanese semiconductor manufacturer specializing in power devices, logic ICs, and storage solutions, with over 50 years of analog and digital IC design heritage.

The TC74AC640F(EL,F) belongs to Toshiba's advanced CMOS AC-series logic family, engineered specifically for high-speed, low-power bidirectional bus interfacing in industrial and automotive control systems where reliability and voltage flexibility are critical.

FAQ

What is the logic function of the TC74AC640F(EL,F)?

The TC74AC640F(EL,F) is an octal 3-state inverting bus transceiver. When DIR = low, data flows from A-bus to B-bus with inversion; when DIR = high, data flows from B-bus to A-bus with inversion. G controls global output enable: G = low activates outputs, G = high places all outputs in high-impedance state. This exact behavior is confirmed in the truth table and functional description of the official Toshiba datasheet.

Does the TC74AC640F(EL,F) support 3.3 V operation?

Yes, the TC74AC640F(EL,F) supports 3.3 V operation across its full specified range: VCC = 2.0 V to 5.5 V. At 3.3 V ±0.3 V, it delivers 7.0 ns typical propagation delay and maintains 24 mA output drive capability per pin, as verified in Section 11.3 AC Characteristics of the Toshiba datasheet.

Is the TC74AC640F(EL,F) pin-compatible with the 74F640?

Yes, the TC74AC640F(EL,F) is explicitly stated in Section 3 Features to be pin- and function-compatible with the 74F640. This includes identical SOP20 pin assignment, matching DIR/G control logic, and inverting transceiver behavior-enabling direct physical and functional replacement without layout modification.

What is the maximum operating temperature for the TC74AC640F(EL,F)?

The TC74AC640F(EL,F) is rated for operation from −40 °C to +85 °C, as defined in Section 10 Operating Ranges of the Toshiba datasheet. This extended temperature range is validated across all DC and AC electrical characteristics, including VOH/VOL, propagation delay, and leakage current limits.

Can unused inputs on the TC74AC640F(EL,F) be left floating?

No, unused inputs on the TC74AC640F(EL,F) must not be left floating. Section 10 Operating Ranges specifies that all unused inputs and bus inputs must be tied to either VCC or GND. Floating bus pins risk undefined logic states, increased noise susceptibility, and potential device malfunction due to internal input stage instability.

TC74AC640F(EL,F) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: 74AC

Package/Case:: 20-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Logic Type:: Transceiver, Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 2V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOP

TC74AC640F(EL,F) FAQ

1.How can I place an order for TC74AC640F(EL,F) through Aetrix?

Please submit a Request for Quotation (RFQ) for TC74AC640F(EL,F) on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TC74AC640F(EL,F) reliable?

The price and inventory of TC74AC640F(EL,F) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC74AC640F(EL,F) is usually 5 days.

3.What payment methods are accepted for TC74AC640F(EL,F)?

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TC74AC640F(EL,F) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC74AC640F(EL,F) order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TC74AC640F(EL,F)?

For technical support, including TC74AC640F(EL,F) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC74AC640F(EL,F) requirements.

6.How does Aetrix verify that TC74AC640F(EL,F) is sourced from the original manufacturer or authorized distributors?

All TC74AC640F(EL,F) products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TC74AC640F(EL,F) meets industry standards.

7.What is the process for return or replacement of TC74AC640F(EL,F)?

All TC74AC640F(EL,F) units undergo pre-shipment inspection (PSI). If there is an issue with TC74AC640F(EL,F), returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TC74AC640F(EL,F) part is unused and in its original packaging.

Return procedure for TC74AC640F(EL,F):

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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