My Inquiry
My Account
Diodes Incorporated PI74FCT374ATS
- Part No.:
- PI74FCT374ATS
- Manufacturer:
- Diodes Incorporated
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PI74FCT374ATS.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,846
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI74FCT374ATS from Pericom Semiconductor is an octal D-type flip-flop register with 3-state outputs, designed for high-speed data latching and bus interface in 5V TTL-compatible systems. It features a buffered common clock, active-low output enable (OE), 25Ω series output resistors to suppress reflections, and operates across –40°C to +85°C. Typical propagation delay is 4.5 ns (max) at 5V, supporting reliable timing in memory address/data buffers and microprocessor peripheral interfaces.
For engineers reviewing the PI74FCT374ATS datasheet, PI74FCT374ATS pinout, PI74FCT374ATS application, or PI74FCT374ATS equivalent, key selection criteria include its 20-pin TSSOP package, 25Ω integrated output termination, low ground bounce, hysteresis-equipped inputs, and compatibility with FAST™-series logic replacements requiring higher speed and lower static power.
Technical Context
This device implements eight edge-triggered D flip-flops sharing a single clock (CP) input and a common 3-state output enable (OE). Data on D0–D7 is captured on the LOW-to-HIGH transition of CP and appears at O0–O7 when OE is LOW; outputs enter high-impedance state when OE is HIGH. The internal architecture includes buffered clock and OE paths to minimize skew and improve noise immunity.
All outputs integrate 25Ω series resistors-unique to the FCT2XXX subfamily-enabling direct connection to transmission lines without external termination. Input hysteresis (200 mV) enhances noise rejection on control signals, while TTL-level I/O ensures seamless interfacing with legacy 5V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5.0 V ±5% - compatible with standard TTL/CMOS 5V rails; supports industrial temperature range operation |
| Propagation Delay (tPLH/tPHL) | 4.5 ns max - enables ≤222 MHz maximum clock frequency in latch-critical paths |
| Output Enable Time (tPZH) | 5.5 ns max - ensures fast bus turnaround in bidirectional data transfer applications |
| Input Hysteresis | 200 mV - improves noise margin on OE and CP lines in electrically noisy environments |
| Output Series Resistance | 25 Ω - eliminates need for external series termination resistors on PCB traces |
| Static ICC | 500 µA max - reduces quiescent power in always-on control logic sections |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and automation systems |
Pinout & Package
PI74FCT374ATS is housed in a 20-pin 173-mil wide plastic TSSOP (L20) package with exposed pad for thermal enhancement. Pin numbering follows standard dual-inline convention with pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-low output enable controlling all eight 3-state outputs simultaneously |
| 2–9 | O0–O7 | True 3-state outputs with integrated 25Ω series resistor per line |
| 10 | GND | Ground reference for logic and power domains |
| 11 | VCC | +5V supply input; decoupling capacitor required near pin for noise suppression |
| 12–19 | D0–D7 | Data inputs synchronized to rising edge of CP; TTL-compatible thresholds |
| 20 | CP | Clock input triggering synchronous capture of D inputs on LOW-to-HIGH transition |
Key Features
| Feature | Design Value |
|---|---|
| 25Ω output series termination | Eliminates external resistors on each output line, reducing BOM count and PCB layout complexity |
| TTL-compatible I/O levels | Direct interoperability with 74LS, 74F, and other 5V logic families without level-shifting |
| Low ground bounce | Minimizes simultaneous switching noise during multi-bit output transitions, improving signal integrity |
| Hysteresis on all inputs | 200 mV input threshold hysteresis prevents chatter on slow-rising or noisy control signals |
| Industrial temperature range | –40°C to +85°C operation validated for use in factory automation, motor drives, and telecom infrastructure |
Applications
| Memory Address Latching | Microprocessor Bus Interface |
|---|---|
|
Use Scenario: Holding address bits stable during CPU read/write cycles while data bus is shared with peripherals. IC Role / Device Role / Timing Role: Octal D register capturing and holding 8-bit address segments on rising clock edge; OE controls bus release timing. Use Value: Enables clean separation of address and data phases in multiplexed bus architectures without external glue logic. |
Use Scenario: Isolating and buffering data between a microcontroller and parallel peripherals such as LCD controllers or ADCs. IC Role / Device Role / Timing Role: Bidirectional data register providing controlled 3-state drive to shared data bus; CP synchronizes with MCU strobe. Use Value: Prevents bus contention and reduces signal reflection via integrated 25Ω output resistors. |
| Industrial I/O Expansion | Digital Signal Routing |
|
Use Scenario: Expanding GPIO capability in PLC modules where deterministic timing and noise immunity are critical. IC Role / Device Role / Timing Role: Synchronous input latch capturing parallel sensor status bits; OE allows dynamic reconfiguration of I/O direction. Use Value: Hysteresis on inputs rejects EMI from relay coils and motor drives in harsh industrial settings. |
Use Scenario: Selecting between multiple digital sources feeding a common processing path in test equipment or instrumentation. IC Role / Device Role / Timing Role: 8-bit data selector using OE as channel enable; CP aligns source data to system clock domain. Use Value: Propagation delay ≤4.5 ns ensures sub-5 ns timing budget compliance in high-resolution timing-critical routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74FCT374CTSO | No integrated 25Ω output resistors; requires external termination for clean signal integrity | Suitable for legacy designs already using discrete termination; lower cost but higher layout overhead | Select when board space permits external resistors and cost sensitivity outweighs layout simplification benefits |
| SN74ACT374N | Higher drive strength (24 mA vs 12 mA), no hysteresis, wider VCC range (4.5–5.5 V) | Better for driving heavier capacitive loads but less robust against noise on OE/CP in industrial environments | Prefer for high-fanout, low-noise lab environments; avoid where hysteresis or integrated termination is required |
Compared with 74FCT374CTSO and SN74ACT374N, PI74FCT374ATS uniquely combines on-die 25Ω termination, input hysteresis, and industrial temperature rating-making it optimal for noise-prone, space-constrained embedded bus interfaces where layout simplicity and reliability are prioritized over raw drive strength.
Availability
PI74FCT374ATS is available at Aetrix Electronics and suitable for memory address latching, microprocessor bus interfacing, and industrial I/O expansion requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for PI74FCT374ATS 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 logic solutions before its acquisition by Diodes Incorporated in 2016. Its FCT logic family targeted performance upgrades over bipolar FAST™ technology.
The PI74FCT374ATS belongs to the PI74FCT2XXX series, engineered specifically for noise-sensitive 5V digital systems needing reduced ground bounce, integrated termination, and industrial-grade reliability without sacrificing speed.
FAQ
Is PI74FCT374ATS pin-compatible with standard 74FCT374 devices?
Yes, PI74FCT374ATS shares identical pinout and function with industry-standard 74FCT374 variants in 20-pin TSSOP packages. Its 25Ω output resistors do not affect pin assignment or logic behavior-only signal integrity on PCB traces. No redesign is needed when upgrading from non-terminated equivalents.
What is the purpose of the 25Ω series resistor on each output?
The 25Ω resistor is integrated into each output driver to match typical PCB trace impedance, suppressing signal reflections that cause ringing and timing errors. This eliminates the need for eight discrete 25Ω surface-mount resistors, reducing component count, layout area, and potential solder joint failures in high-reliability applications.
Can PI74FCT374ATS operate at 3.3V supply voltage?
No. PI74FCT374ATS is specified only for 5.0 V ±5% operation. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output drive characteristics are optimized for 5V TTL compatibility. Using 3.3V violates absolute maximum ratings and will result in undefined logic states and unreliable operation.
How does input hysteresis improve system reliability?
The 200 mV hysteresis on all inputs raises the effective VIH threshold when transitioning from LOW to HIGH and lowers VIL when transitioning from HIGH to LOW. This prevents oscillation or metastability on slowly ramping or electrically noisy control lines-especially critical for OE and CP in industrial environments with relay-induced transients or long cable runs.
PI74FCT374ATS 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:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- 6.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 15mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- 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
PI74FCT374ATS FAQ
1.How can I place an order for PI74FCT374ATS through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74FCT374ATS 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 PI74FCT374ATS reliable?
The price and inventory of PI74FCT374ATS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74FCT374ATS is usually 5 days.
3.What payment methods are accepted for PI74FCT374ATS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74FCT374ATS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74FCT374ATS?
PI74FCT374ATS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74FCT374ATS 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 PI74FCT374ATS?
For technical support, including PI74FCT374ATS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74FCT374ATS requirements.
6.How does Aetrix verify that PI74FCT374ATS is sourced from the original manufacturer or authorized distributors?
All PI74FCT374ATS 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 PI74FCT374ATS meets industry standards.
7.What is the process for return or replacement of PI74FCT374ATS?
All PI74FCT374ATS units undergo pre-shipment inspection (PSI). If there is an issue with PI74FCT374ATS, 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 PI74FCT374ATS part is unused and in its original packaging.
Return procedure for PI74FCT374ATS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI74FCT374ATS Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
