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Renesas 54FCT373ATDB
- Part No.:
- 54FCT373ATDB
- Manufacturer:
- Renesas
- Category:
- Latches
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
54FCT373ATDB.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,497
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Product details
Overview
54FCT373ATDB from Renesas Electronics (formerly IDT) is a military-grade octal transparent latch with 3-state outputs, designed for high-reliability bus-oriented systems. It operates over –55°C to +125°C, features TTL-compatible inputs/outputs (VOH = 3.3V typ., VOL = 0.3V typ.), delivers ±15mA/48mA drive strength, and supports fast propagation delays (tPLH ≤ 5.6ns, tPHL ≤ 9.8ns at CL = 50pF).
For engineers reviewing the 54FCT373ATDB datasheet, 54FCT373ATDB pinout, 54FCT373ATDB application, or 54FCT373ATDB equivalent, key selection criteria include military temperature compliance, true TTL interface compatibility, high-current 3-state bus driving capability, and live-insertion support via power-off disable outputs.
Technical Context
The 54FCT373ATDB implements an advanced dual-metal CMOS process to achieve fast switching while maintaining CMOS power efficiency. Its transparent latch architecture responds directly to Latch Enable (LE) level: data passes through when LE is HIGH, and is captured on LE transition to LOW, meeting setup (tSU ≥ 2ns) and hold (tH ≥ 1.5ns) timing requirements.
Output Enable (OE) controls 3-state bus interface independently-OE LOW enables outputs (Ox = Dx), OE HIGH places all outputs in high-impedance (Z) state. This decoupling of latching and output control allows flexible bus arbitration and hot-swap operation without disrupting system-level signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –55°C to +125°C (MIL-STD-883 Class B qualified) |
| Supply Voltage | VCC = 5.0V ±10% - ensures stable operation across military voltage tolerances |
| Propagation Delay | tPLH/tPHL ≤ 5.6ns/9.8ns - enables sub-100MHz bus timing margins |
| Output Drive | IOH = –15mA, IOL = 48mA - drives heavy capacitive loads and multiple TTL inputs |
| Input Compatibility | True TTL: VIH = 2.0V min, VIL = 0.8V max - interoperable with legacy 5V logic families |
| Power Dissipation | ICC ≤ 1mA (quiescent), ΔICC ≤ 2mA (TTL input loading) - low static and dynamic power in harsh environments |
| 3-State Leakage | IOZH/IOZL ≤ ±1µA - prevents bus contention during high-Z state |
Pinout & Package
54FCT373ATDB is supplied in a 20-pin CERDIP (CD20) package, hermetically sealed for extended reliability in aerospace and defense applications. Pin layout follows JEDEC MS-012 standard with dual-row 0.3-inch width and 0.1-inch lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Data Inputs | Asynchronous parallel data inputs; sampled on LE HIGH or latched on LE falling edge |
| O0–O7 | 3-State Outputs | Bus-connected outputs; driven only when OE = LOW, otherwise high-impedance |
| LE | Latch Enable | Active-HIGH control: enables transparency when HIGH, captures data on falling edge |
| OE | Output Enable | Active-LOW control: enables output drivers when LOW, disables (Z) when HIGH |
| VCC | Power Supply | +5V supply pin (Pin 16); requires local 0.1µF ceramic bypass to GND (Pin 8) |
| GND | Ground Reference | Signal and power return (Pin 8); must be low-inductance connection for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Live insertion support | Power-off disable outputs limit leakage to ±1µA when VCC = 0V, enabling safe board replacement under power |
| MIL-STD-883 Class B compliance | Fully screened per military test flow including temperature cycling, burn-in, and radiation hardness assurance |
| TTL-compatible I/O | Guaranteed VOH ≥ 2.4V at –6mA and VOL ≤ 0.5V at 32mA - eliminates level-shifting in mixed-logic systems |
| Low input leakage | IIH/IIL ≤ ±1µA - preserves signal integrity in high-impedance control paths and reduces standby current |
| High noise immunity | Input hysteresis VH = 200mV - suppresses false triggering from EMI or slow-rising control signals |
Applications
| Aerospace Avionics Data Bus | Military Vehicle Control System |
|---|---|
Use Scenario: Interfacing sensor ADCs and discrete I/O to a MIL-STD-1553B or ARINC 429 bus controller in flight-critical subsystems. IC Role / Device Role / Timing Role: Octal latch buffers asynchronous sensor data into synchronized command frames; LE timed to system clock edge, OE controlled by bus arbiter. Use Value: Ensures deterministic data capture under –55°C cold-start and +125°C engine-bay thermal stress, with no timing derating required. | Use Scenario: Isolating and buffering command signals between vehicle ECUs and ruggedized display/actuator modules in tracked armored platforms. IC Role / Device Role / Timing Role: Provides galvanically isolated bus interface using 3-state outputs; OE coordinated with CAN FD message framing to prevent bus contention. Use Value: Enables hot-swap of mission-critical modules without powering down the entire vehicle network, supported by live-insertion leakage specs. |
| Secure Communications Crypto Module | Radar Signal Processing Backplane |
Use Scenario: Holding encrypted key material and configuration registers in NSA-certified Type 1 encryption hardware operating in TEMPEST-shielded enclosures. IC Role / Device Role / Timing Role: Latches cryptographic keys during secure boot; LE strobed by tamper-detection circuit, OE gated by security state machine. Use Value: Military temperature range and hermetic CERDIP packaging prevent parametric drift or failure during sustained high-power crypto operations. | Use Scenario: Buffering high-speed analog-to-digital sample streams from phased-array radar receivers to FPGA-based beamforming engines. IC Role / Device Role / Timing Role: Synchronizes parallel ADC outputs to FPGA clock domain; LE aligned to ADC conversion complete pulse, OE managed by DMA controller. Use Value: Sub-10ns propagation delay and 48mA drive ensure clean signal edges across 12-inch backplane traces loaded with multiple FPGAs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 54FCT373TDB | Slower timing: tPLH/tPHL ≤ 8.5ns/15ns; no A-grade screening | Suitable for non-critical subsystems where full Class B qualification is not mandated | Select when cost sensitivity outweighs need for tight timing margins and extended reliability screening |
| 54FCT373CTDB | Faster timing: tPLH/tPHL ≤ 5.1ns/8ns; tighter propagation skew | Preferred for high-frequency bus designs requiring <8ns worst-case delay consistency | Select when system-level timing budget demands best-in-class speed and skew control |
Compared with 54FCT373TDB and 54FCT373CTDB, the 54FCT373ATDB offers balanced performance-faster than the T-grade but more cost-effective than the C-grade-while retaining full MIL-STD-883 Class B qualification critical for deployed defense systems.
Availability
54FCT373ATDB is available at Aetrix Electronics and suitable for aerospace avionics, military vehicle control, and secure communications systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 54FCT373ATDB 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and infrastructure markets.
The 54FCT373ATDB belongs to Renesas' legacy IDT military logic family, engineered specifically for high-reliability 5V bus interfacing in defense electronics where extended temperature operation, radiation tolerance, and long-term obsolescence mitigation are mandatory.
FAQ
What is the maximum operating temperature for the 54FCT373ATDB?
The 54FCT373ATDB is rated for continuous operation from –55°C to +125°C, fully compliant with MIL-STD-883 Class B environmental testing requirements. This specification is guaranteed across the full voltage range (VCC = 5.0V ±10%) and validated through temperature cycling, steady-state life testing, and burn-in procedures performed per military screening flow.
Does the 54FCT373ATDB support live insertion in powered-backplane systems?
Yes, the 54FCT373ATDB supports live insertion due to its power-off disable outputs, which limit I/O leakage to ±1µA when VCC = 0V. This feature, combined with its CERDIP hermetic package and MIL-STD-883 Class B qualification, enables safe module replacement without system shutdown in deployed military platforms.
What is the pinout configuration of the 54FCT373ATDB?
The 54FCT373ATDB uses a 20-pin CERDIP (CD20) package with JEDEC MS-012 outline. Key pins include D0–D7 (data inputs), O0–O7 (3-state outputs), LE (active-HIGH latch enable), OE (active-LOW output enable), VCC (Pin 16), and GND (Pin 8). Full pin mapping matches the functional block diagram in the official Renesas datasheet DSC-5496/7.
How does the 54FCT373ATDB differ from commercial-grade 74FCT373 variants?
The 54FCT373ATDB differs from commercial 74FCT373 parts in three key ways: it is screened to MIL-STD-883 Class B, operates over –55°C to +125°C (vs. –40°C to +85°C), and is packaged in hermetic CERDIP instead of plastic SOIC/SSOP. Electrical parameters such as VOH/VOL and propagation delay are specified across the full military range-not just at 25°C.
Is the 54FCT373ATDB RoHS-compliant?
Yes, the 54FCT373ATDB is RoHS-compliant and marked with the "G" suffix in ordering codes per Renesas' December 2016 datasheet revision. It meets EU Directive 2011/65/EU and subsequent amendments, with lead-free terminations and halogen-free molding compound consistent with military-grade environmental standards.
54FCT373ATDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 4.5V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 9.8ns
- Current - Output High, Low:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
54FCT373ATDB FAQ
1.How can I place an order for 54FCT373ATDB through Aetrix?
Please submit a Request for Quotation (RFQ) for 54FCT373ATDB 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 54FCT373ATDB reliable?
The price and inventory of 54FCT373ATDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 54FCT373ATDB is usually 5 days.
3.What payment methods are accepted for 54FCT373ATDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 54FCT373ATDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 54FCT373ATDB?
54FCT373ATDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 54FCT373ATDB 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 54FCT373ATDB?
For technical support, including 54FCT373ATDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 54FCT373ATDB requirements.
6.How does Aetrix verify that 54FCT373ATDB is sourced from the original manufacturer or authorized distributors?
All 54FCT373ATDB 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 54FCT373ATDB meets industry standards.
7.What is the process for return or replacement of 54FCT373ATDB?
All 54FCT373ATDB units undergo pre-shipment inspection (PSI). If there is an issue with 54FCT373ATDB, 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 54FCT373ATDB part is unused and in its original packaging.
Return procedure for 54FCT373ATDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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