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Diodes Incorporated PI74FCT273ATS
- Part No.:
- PI74FCT273ATS
- Manufacturer:
- Diodes Incorporated
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PI74FCT273ATS.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,282
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Product details
Overview
PI74FCT273ATS from Pericom Semiconductor is an 8-bit edge-triggered D-type flip-flop with synchronous master reset, TTL-compatible inputs/outputs, and 20-pin SOIC (S) packaging. It operates at 5.0 V ±5%, delivers tPLH/tPHL ≤7.2 ns (FCT-A speed grade), supports industrial temperature range (–40°C to +85°C), and is used in bus interface latching and data synchronization in industrial control backplanes.
For engineers reviewing the PI74FCT273ATS datasheet, PI74FCT273ATS pinout, PI74FCT273ATS application, or PI74FCT273ATS equivalent, key selection criteria include setup/hold timing (tSU = 2.0 ns, tH = 1.5 ns), low static power (ICC ≤ 500 µA), rail-to-rail output drive (IOH = –15 mA, IOL = 64 mA), and compatibility with legacy FAST™ logic systems.
Technical Context
This device implements eight independent D flip-flops sharing a common rising-edge clock (CP) and active-low asynchronous master reset (MR). All outputs respond synchronously to CP transitions, with data sampled one setup time before the LOW-to-HIGH clock edge.
Input hysteresis (200 mV) enhances noise immunity on CP and MR lines; outputs feature low ground bounce and TTL-level voltage thresholds (VIH = 2.0 V, VIL = 0.8 V), enabling direct interfacing with bipolar logic families without level shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | FCT-A (Fast CMOS, TTL-compatible input/output levels) |
| Propagation Delay (tPLH/tPHL) | ≤7.2 ns at CL = 50 pF, RL = 500 Ω - enables 100+ MHz system clock domain synchronization |
| Setup/Hold Time | tSU = 2.0 ns, tH = 1.5 ns - tight timing margin for high-speed parallel bus capture |
| Output Drive | IOH = –15 mA / IOL = 64 mA - sufficient to drive 10 TTL loads or 20 CMOS loads directly |
| Supply Current (Quiescent) | ICC ≤ 500 µA at VCC = 5.0 V - reduces standby power in always-on industrial modules |
| Operating Temperature | –40°C to +85°C - qualified for uncontrolled industrial environments without derating |
| Input Hysteresis | VH = 200 mV - suppresses false triggering from slow-rising or noisy clock/reset signals |
Pinout & Package
20-pin SOIC (S) package, 300-mil width, Pb-free & Green compliant (per ordering code PI74FCT273ATS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master Reset (Active LOW) | Asynchronous clear: forces all Q outputs LOW regardless of clock or data state |
| 2–9 (D0–D7) | Data Inputs | Edge-sampled inputs; valid one setup time before CP rising edge |
| 10 (GND) | Ground Reference | Primary return path for logic and output current; decoupling required within 10 mm |
| 11–18 (O0–O7) | Data Outputs | Registered outputs synchronized to CP rising edge; driven HIGH/LOW per latched Dn value |
| 19 (VCC) | Power Supply | +5.0 V ±5% supply; requires local 0.1 µF ceramic bypass capacitor |
| 20 (CP) | Clock Pulse Input | Rising-edge sensitive; triggers simultaneous sampling of all D inputs into respective flip-flops |
Key Features
| Feature | Design Value |
|---|---|
| PIN-compatible replacement for bipolar FAST™ series | Enables drop-in upgrade path with 3× lower power and 2× higher speed than 74F273 |
| TTL input and output voltage levels | Eliminates need for level translators when interfacing with legacy 74LS/74ALS bus drivers |
| Low ground bounce outputs | Reduces simultaneous switching noise (SSN) in dense PCB layouts with multiple parallel registers |
| Hysteresis on all inputs | Prevents metastability on slow-rising CP or MR signals caused by long trace routing or RC filtering |
| Industrial temperature range support | Validated operation across full –40°C to +85°C ambient without thermal derating or guardbanding |
Applications
| Industrial PLC Backplane Interface | Legacy Bus Data Latching |
|---|---|
|
Use Scenario: Capturing parallel status signals from field I/O modules onto a centralized control bus. IC Role / Device Role / Timing Role: Synchronous register holding 8-bit sensor status or actuator command data aligned to system clock domain. Use Value: Ensures deterministic sampling with <2 ns setup margin, preventing metastability-induced data corruption during hot-swap events. |
Use Scenario: Buffering address/data lines between microcontroller and external memory or peripheral ASICs. IC Role / Device Role / Timing Role: Edge-triggered latch isolating CPU write cycles from slower memory access timing. Use Value: Enables reliable 100+ MHz CPU-to-peripheral handshaking using only a single clock edge, reducing control logic complexity. |
| Automated Test Equipment (ATE) Pattern Generator | Digital Signal Acquisition Front-End |
|
Use Scenario: Storing test vector bits prior to parallel application to device-under-test pins. IC Role / Device Role / Timing Role: Static pattern register synchronized to ATE master clock for precise stimulus timing. Use Value: Delivers sub-8 ns propagation delay and 1.5 ns hold time, supporting >120 MHz pattern update rates with zero timing slack. |
Use Scenario: Capturing parallel ADC output words before serial conversion or DMA transfer. IC Role / Device Role / Timing Role: Input register aligning multi-channel analog-to-digital samples to system timing reference. Use Value: Low ground bounce and hysteresis ensure clean sampling of 12-bit ADC outputs even under high-current digital switching conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D flip-flop with master reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74F273SCX (ON Semiconductor) | Bipolar FAST™ technology; higher ICC (20 mA typical), slower tPLH (15 ns), no input hysteresis | Compatible with legacy 5 V TTL systems but requires additional decoupling and thermal management | Select when maintaining exact pinout and timing behavior of original 74F273 designs is mandatory |
| SN74ACT273N (Texas Instruments) | ACT family; 5 V CMOS, VIH/VIL tighter (3.5 V/1.0 V), higher drive (IOL = 24 mA), no hysteresis | Requires level-shifting for 74LS/74ALS interfaces; unsuitable for noisy industrial reset lines | Select for new designs requiring lowest power-delay product in clean lab environments |
Compared with 74F273SCX and SN74ACT273N, PI74FCT273ATS uniquely balances TTL compatibility, industrial noise immunity (via hysteresis), and low-power CMOS efficiency-making it optimal for retrofitting legacy systems while meeting modern reliability requirements.
Availability
PI74FCT273ATS is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automated test equipment pattern generation, and digital signal acquisition front-ends requiring stable component supply across extended lifecycle programs.
Supply support for PI74FCT273ATS 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
Pericom Semiconductor was a fabless provider specializing in high-speed interface, timing, and signal integrity solutions before its acquisition by Diodes Incorporated in 2017.
The PI74FCT273ATS belongs to the FCT-A logic family, engineered for pin-compatible upgrades of legacy bipolar logic in industrial and telecom infrastructure where noise immunity, timing precision, and power efficiency are critical.
FAQ
Is PI74FCT273ATS compatible with 3.3 V logic systems?
No. PI74FCT273ATS is a 5 V-only device with TTL-compatible input thresholds (VIH = 2.0 V minimum, VIL = 0.8 V maximum) and VCC = 5.0 V ±5% operation. Driving its inputs from 3.3 V sources may result in marginal HIGH recognition; level translation is required for mixed-voltage systems.
What is the maximum clock frequency supported by PI74FCT273ATS?
The device supports reliable operation up to 100 MHz under typical conditions, based on tW(CP) = 6.0 ns minimum pulse width and tPLH/tPHL ≤7.2 ns propagation delay. System-level timing must account for board trace delays and load capacitance; derating is recommended above 80 MHz in high-noise environments.
Does PI74FCT273ATS require external pull-up resistors on MR or CP pins?
No. MR and CP inputs have internal hysteresis and standard TTL input structure; they do not require external pull-ups. However, if left unconnected, MR must be tied to VCC (to disable reset), and CP must be driven - floating inputs risk undefined behavior and increased EMI susceptibility.
Can PI74FCT273ATS drive LED indicators directly?
Yes, with design constraints: each O0–O7 output can sink up to 64 mA (IOL), sufficient for common 2–20 mA LEDs. Use series current-limiting resistors calculated for VCC = 5 V, forward voltage ~1.8–2.2 V, and desired LED current. Do not exceed total package power dissipation (0.5 W) when driving multiple LEDs simultaneously.
PI74FCT273ATS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- 7.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 15mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 500 µA
- Input Capacitance:
- 6 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
PI74FCT273ATS FAQ
1.How can I place an order for PI74FCT273ATS through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74FCT273ATS 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 PI74FCT273ATS reliable?
The price and inventory of PI74FCT273ATS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74FCT273ATS is usually 5 days.
3.What payment methods are accepted for PI74FCT273ATS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74FCT273ATS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74FCT273ATS?
PI74FCT273ATS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74FCT273ATS 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 PI74FCT273ATS?
For technical support, including PI74FCT273ATS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74FCT273ATS requirements.
6.How does Aetrix verify that PI74FCT273ATS is sourced from the original manufacturer or authorized distributors?
All PI74FCT273ATS 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 PI74FCT273ATS meets industry standards.
7.What is the process for return or replacement of PI74FCT273ATS?
All PI74FCT273ATS units undergo pre-shipment inspection (PSI). If there is an issue with PI74FCT273ATS, 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 PI74FCT273ATS part is unused and in its original packaging.
Return procedure for PI74FCT273ATS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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