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Toshiba Semiconductor and Storage 74LCX374FT(AE)
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- Part No.:
- 74LCX374FT(AE)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LCX374FT(AE).pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOPB
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
74LCX374FT(AE) from Toshiba is a low-voltage octal D-type flip-flop with 5-V tolerant inputs and outputs, designed for 3.3-V system-level data latching in mixed-voltage digital interfaces. It features 8-bit edge-triggered storage, output enable control (OE), high-speed propagation delay of 8.5 ns (max at VCC = 3.3 V), and ±24 mA output drive capability - enabling reliable signal buffering in FPGA-to-ASIC interconnects and industrial I/O expansion modules.
For engineers reviewing the 74LCX374FT(AE) datasheet, 74LCX374FT(AE) pinout, 74LCX374FT(AE) application, or 74LCX374FT(AE) equivalent, key selection criteria include 1.65–3.6 V supply compatibility, 5-V tolerant I/O for legacy interface bridging, TSSOP20B package footprint constraints, and OE-controlled 3-state output behavior for bus sharing.
Technical Context
The 74LCX374FT(AE) implements eight independent D-type latches synchronized to the rising edge of the clock (CK), with all outputs placed in high-impedance state when OE is asserted high. Its input protection circuitry enables safe operation across 3.3-V logic domains interfacing to 5-V peripherals without external level shifters.
It operates within -40°C to +85°C ambient temperature, supports dynamic switching up to 150 MHz (VCC = 3.3 V), and maintains low quiescent current (ICC ≤ 500 µA) while delivering rail-to-rail output swing under load - making it suitable for power-sensitive embedded control backplanes requiring deterministic timing and voltage translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct integration into 3.3-V core logic systems without regulator overhead. |
| Propagation Delay (tPD) | 8.5 ns max (VCC = 3.0–3.6 V) - ensures sub-10 ns setup/hold timing margins for 100+ MHz synchronous buses. |
| Output Drive | ±24 mA (IOL/IOH min at VCC = 3.0 V) - drives standard TTL loads and multiple CMOS inputs without fanout limitation. |
| I/O Voltage Tolerance | 0 V to 5.5 V input/output range - allows safe connection to 5-V microcontrollers, sensors, or legacy peripherals without clamping diodes. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade operation in factory automation and outdoor communications equipment. |
| Package | TSSOP20B (4.4 mm × 6.5 mm, 0.65 mm pitch) - surface-mount compatible with automated PCB assembly and space-constrained designs. |
| Input Leakage | ±5.0 µA max (VIH/VIL) - minimizes static current draw in battery-backed or always-on monitoring circuits. |
Pinout & Package
TSSOP20B 20-pin thin shrink small-outline package with 0.65 mm lead pitch, 4.4 mm body width, and 6.5 mm length; RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-high control: pulls all Q outputs to high-impedance when logic HIGH - essential for shared data bus arbitration. |
| 2–9 (D1–D8) | Data Inputs | Asynchronous D inputs accepting 0–5.5 V signals; internally clamped to VCC/GND for 5-V tolerance. |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output drivers; must be low-inductance connection for noise immunity. |
| 11–18 (Q1–Q8) | Registered Outputs | Edge-triggered latched outputs; driven only when OE = LOW and CK rising edge occurs - no transparent mode. |
| 19 (CK) | Clock Input | Rising-edge sensitive; VIH ≥ 2.0 V (VCC = 2.7–3.6 V), with 1.5 ns minimum pulse width requirement. |
| 20 (VCC) | Supply Voltage | Core logic and I/O supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| 5-V tolerant I/O | Enables direct interfacing between 3.3-V FPGAs and 5-V microcontrollers or sensors without external level translators. |
| Power-down protection | Prevents back-driving damage during power sequencing mismatches - critical in hot-swap or multi-rail systems. |
| Pin-compatible with 74LVC374 | Allows drop-in replacement in existing LVC-based designs while improving noise margin and drive strength. |
| Low dynamic power consumption | CPD = 25 pF (typ.) at 3.3 V enables <1 mW typical active power at 10 MHz - suitable for thermally constrained enclosures. |
| High ESD immunity | Human Body Model (HBM) ≥ 2 kV on all pins - reduces field failure risk in manual handling or unshielded environments. |
Applications
| Industrial PLC I/O Expansion | FPGA-to-Microcontroller Bridge |
|---|---|
|
Use Scenario: Adding isolated digital input/output channels to programmable logic controllers using modular carrier boards. IC Role / Device Role / Timing Role: Latches parallel status signals from field sensors and buffers command outputs to actuators under FPGA control. Use Value: 5-V tolerant I/O eliminates discrete level-shifting components; 8.5 ns tPD ensures real-time response within 100 µs scan cycles. |
Use Scenario: Interfacing Xilinx Artix-7 FPGA GPIO banks (3.3-V) to legacy 5-V ARM Cortex-M4 MCU peripherals. IC Role / Device Role / Timing Role: Synchronizes and isolates bidirectional data transfers between clock domains using OE-controlled bus sharing. Use Value: Pin compatibility with 74LVC374 simplifies migration; ±24 mA drive supports full-swing signaling over 10 cm PCB traces. |
| Automated Test Equipment (ATE) Fixture Logic | Smart Sensor Hub Interface |
|
Use Scenario: Signal conditioning and timing alignment in benchtop ATE fixtures that route test vectors to DUTs with mixed-voltage interfaces. IC Role / Device Role / Timing Role: Captures stimulus patterns from pattern generators and holds them stable during DUT evaluation windows. Use Value: -40°C to +85°C rating ensures reliability across environmental stress tests; low ICC supports portable battery-powered fixtures. |
Use Scenario: Aggregating digital outputs from multiple MEMS pressure/temperature sensors operating at 5-V before feeding into 3.3-V MCU ADC subsystems. IC Role / Device Role / Timing Role: Acts as voltage-translating latch for sensor data capture synchronized to host read strobes. Use Value: Input leakage ≤5 µA prevents sensor bias drift; TSSOP20B footprint fits dense sensor module layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC374PW,118 (Nexperia) | Same TSSOP20 package, but rated only for 1.65–3.6 V I/O (not 5-V tolerant); tPD = 7.5 ns (VCC = 3.3 V). | Lacks 5-V input tolerance - requires external clamping or level shifters when interfacing to 5-V sources. | Select when operating exclusively in 3.3-V-only systems and maximum speed is prioritized over interface flexibility. |
| SN74LVCH16374ADGGR (TI) | 16-bit version in 48-pin TSSOP; 3.3-V only I/O (no 5-V tolerance); higher drive (±24 mA), same VCC range. | Double data width and larger footprint - suited for wide-bus applications but incompatible pinout and layout. | Choose for high-channel-count applications where board space permits and 5-V interface is unnecessary. |
Compared with 74LCX374FT(AE), the 74LVC374PW offers faster propagation but sacrifices 5-V tolerance, while SN74LVCH16374ADGGR provides double bit width at the cost of pin compatibility and added complexity - making 74LCX374FT(AE) optimal for compact, mixed-voltage 8-bit latching where interface robustness is critical.
Availability
74LCX374FT(AE) is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, FPGA-to-microcontroller bridging, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for 74LCX374FT(AE) 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 logic ICs, power devices, and memory solutions for industrial, automotive, and consumer applications.
The 74LCX series was developed to deliver high-speed, low-voltage CMOS logic with 5-V tolerant I/O for seamless integration between legacy and modern digital systems - targeting mixed-supply interface challenges in factory automation and communications infrastructure.
FAQ
What is the maximum clock frequency supported by the 74LCX374FT(AE)?
The 74LCX374FT(AE) supports a maximum clock frequency of 150 MHz when operated at VCC = 3.3 V, as specified in its AC characteristics table. This value is derived from the 8.5 ns maximum propagation delay (tPD) and accounts for setup/hold timing margins under standard load conditions (CL = 50 pF). Frequency derating applies below VCC = 3.0 V - e.g., 100 MHz at VCC = 2.5 V.
Does the 74LCX374FT(AE) require external pull-up or pull-down resistors on unused inputs?
Yes, the 74LCX374FT(AE) requires all unused inputs (including OE and CK) to be tied to either VCC or GND to prevent floating states that may cause excessive current draw or metastability. This is explicitly stated in the Operating Ranges section of the datasheet (Note: "Unused inputs must be tied to either VCC or GND"). Leaving inputs unconnected violates recommended operating conditions and risks erratic behavior.
Is the 74LCX374FT(AE) pin-compatible with standard 74HC374 devices?
No, the 74LCX374FT(AE) is not pin-compatible with 74HC374 due to differing supply voltage requirements and I/O architecture. While both share identical pin numbering and functional assignment (e.g., D1–D8, Q1–Q8, CK, OE, VCC, GND), the 74HC374 operates at 2–6 V and lacks 5-V tolerant inputs. Direct substitution may cause overvoltage damage if 5-V signals are applied to HC-series inputs.
What is the meaning of "Power-down protection" in the 74LCX374FT(AE) datasheet?
"Power-down protection" in the 74LCX374FT(AE) refers to built-in circuitry that prevents current backflow through inputs or outputs when VCC is at 0 V or significantly lower than applied signal voltages. This allows safe operation during partial power sequencing - for example, when 5-V signals remain active while the 3.3-V supply is off - avoiding latch-up or permanent damage to the device or connected circuitry.
Can the 74LCX374FT(AE) be used in automotive applications?
The 74LCX374FT(AE) is not qualified for automotive applications per AEC-Q100 standards. Its specified operating temperature range is -40°C to +85°C, which meets industrial grade requirements but falls short of the -40°C to +125°C extended range and qualification testing mandated for automotive use. Toshiba explicitly restricts its use in automotive systems unless expressly approved in writing for specific applications.
74LCX374FT(AE) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- 74LCX
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 8.5ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 7 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOPB
74LCX374FT(AE) FAQ
1.How can I place an order for 74LCX374FT(AE) through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LCX374FT(AE) 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 74LCX374FT(AE) reliable?
The price and inventory of 74LCX374FT(AE) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX374FT(AE) is usually 5 days.
3.What payment methods are accepted for 74LCX374FT(AE)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX374FT(AE) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LCX374FT(AE)?
74LCX374FT(AE) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LCX374FT(AE) 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 74LCX374FT(AE)?
For technical support, including 74LCX374FT(AE) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX374FT(AE) requirements.
6.How does Aetrix verify that 74LCX374FT(AE) is sourced from the original manufacturer or authorized distributors?
All 74LCX374FT(AE) 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 74LCX374FT(AE) meets industry standards.
7.What is the process for return or replacement of 74LCX374FT(AE)?
All 74LCX374FT(AE) units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX374FT(AE), 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 74LCX374FT(AE) part is unused and in its original packaging.
Return procedure for 74LCX374FT(AE):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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