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Diodes Incorporated PI74FCT828ATQ
- Part No.:
- PI74FCT828ATQ
- Manufacturer:
- Diodes Incorporated
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
PI74FCT828ATQ.pdf
- Description:
- IC BUF NON-INVERT 5.25V 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,475
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Product details
Overview
PI74FCT828ATQ from Pericom Semiconductor is a 10-bit inverting bus buffer with dual active-low output enables, TTL-compatible I/O, built-in 25Ω series output resistors, and industrial temperature range (–40°C to +85°C). It drives high-capacitance buses while presenting low input/output capacitance (CIN ≤ 10 pF, COUT ≤ 12 pF), enabling clean signal integrity in wide address/data paths and parity buses.
For engineers reviewing the PI74FCT828ATQ datasheet, PI74FCT828ATQ pinout, PI74FCT828ATQ application, or PI74FCT828ATQ equivalent, key selection criteria include propagation delay (tPLH/tPHL ≤ 6.5 ns @ CL = 50 pF), three-state enable/disable timing (tPZH ≤ 9.5 ns, tPHZ ≤ 8.5 ns), and guaranteed noise suppression via integrated 25Ω output termination.
Technical Context
This device implements a dual-control, NAND-ed output enable architecture (OE1 and OE2 both low for active drive), supporting flexible bus arbitration in multi-master systems. Its inverting logic function (D→Y inversion) and hysteresis on all inputs (200 mV) improve noise immunity in electrically noisy industrial environments.
Designed in 0.8 µm CMOS, it delivers FAST™-compatible pinout with superior speed and lower static power (ICC ≤ 500 µA) versus bipolar equivalents. The 25Ω series resistor per output eliminates external termination, reducing PCB area and reflection-induced ringing on transmission lines up to 300 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Inverting 10-bit buffer with dual active-low enables (OE1, OE2) |
| Propagation Delay | tPLH/tPHL ≤ 6.5 ns at CL = 50 pF - enables >150 MHz bus operation |
| Output Termination | Integrated 25Ω series resistor per output - eliminates external termination components |
| Input Hysteresis | 200 mV - improves noise margin against ground bounce and EMI |
| Supply Voltage | 5.0 V ± 5% - compatible with standard TTL and 5V CMOS systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and control applications |
| Input/Output Capacitance | CIN ≤ 10 pF, COUT ≤ 12 pF - minimizes loading on driving and driven nets |
Pinout & Package
PI74FCT828ATQ is housed in a 24-pin plastic TQSOP (Thin Quad Small Outline Package) with 0.65 mm pitch and 3.9 mm body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 | D0–D9 | 10-bit inverting data inputs - accept TTL-level signals (VIH ≥ 2.0 V, VIL ≤ 0.8 V) |
| 11, 12 | OE1, OE2 | NAND-ed active-low output enables - both must be low for Y0–Y9 drive; either high forces high-impedance |
| 13 | GND | Ground reference - decoupling capacitor required near pin for noise control |
| 14 | VCC | +5 V supply - requires local 0.1 µF ceramic bypass capacitor |
| 15–24 | Y0–Y9 | 10-bit inverting buffered outputs - each includes 25Ω series resistor for controlled impedance drive |
Key Features
| Feature | Design Value |
|---|---|
| 25Ω series output termination | Reduces signal reflections without external resistors - simplifies layout and improves SI on long traces |
| TTL-compatible I/O levels | Direct interface with legacy 5V microcontrollers, FPGAs, and ASICs without level-shifting |
| Low ground bounce outputs | Minimizes simultaneous switching noise during multi-bit transitions - critical for mixed-signal systems |
| Hysteresis on all inputs | 200 mV threshold window suppresses false triggering from slow-rising or noisy inputs |
| Industrial temperature range | –40°C to +85°C operation - supports deployment in factory automation, motor drives, and outdoor equipment |
Applications
| Industrial PLC Backplane Interface | Legacy Microprocessor Address Bus Buffering |
|---|---|
|
Use Scenario: Buffering 10-bit address lines between an 80C188 CPU and modular I/O expansion slots in a programmable logic controller. IC Role / Device Role / Timing Role: Inverting bus driver with dual OE control enables selective slot activation and prevents bus contention during hot-swap events. Use Value: Integrated 25Ω termination ensures clean edge integrity across 15 cm backplane traces; tPHZ ≤ 8.5 ns allows fast disable before next address cycle. |
Use Scenario: Isolating and strengthening address bits A0–A9 from a Z80-based single-board computer to external EPROM and peripheral decoder ICs. IC Role / Device Role / Timing Role: Non-reflected inverting buffer that matches TTL fanout requirements while minimizing capacitive loading on the CPU's address pins. Use Value: CIN ≤ 10 pF reduces loading on Z80 outputs; hysteresis rejects noise from adjacent motor control lines in compact chassis layouts. |
| Parity Generation/Checking Path | High-Density Data Acquisition Front-End |
|
Use Scenario: Driving 10-bit parity bits from a parity generator IC to multiple downstream comparators in a fault-tolerant memory subsystem. IC Role / Device Role / Timing Role: Three-state inverting buffer synchronized to system clock enable edges, allowing time-multiplexed parity validation. Use Value: Dual OE inputs permit precise timing alignment with clock domain boundaries; tPZH ≤ 9.5 ns ensures setup to comparator sampling windows. |
Use Scenario: Interfacing 10-bit ADC outputs (e.g., AD7822) to a DSP's external memory interface under noisy industrial EMI conditions. IC Role / Device Role / Timing Role: Noise-immune bus driver that conditions parallel digital outputs before latching into the DSP's EDMA controller. Use Value: 200 mV input hysteresis rejects EMI-induced glitches; low COUT ≤ 12 pF prevents signal degradation at 5 MSPS sampling rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74F240SCX (ON Semiconductor) | No integrated 25Ω output resistors; higher ICC (≤ 30 mA typical); no input hysteresis | Requires external series termination; less robust in noisy environments | Select when cost sensitivity outweighs SI optimization and board space constraints |
| SN74ACT240N (TI) | ACT logic family; 5V-only, no 25Ω resistors; higher VOL (0.5 V @ 24 mA); faster tPLH (4.5 ns) | Better speed but demands stricter layout control and external termination | Prefer for high-speed designs where layout discipline and decoupling rigor can be guaranteed |
Compared with 74F240SCX and SN74ACT240N, PI74FCT828ATQ uniquely combines integrated termination, hysteresis, and ultra-low static current-reducing BOM count and improving noise resilience without sacrificing timing performance.
Availability
PI74FCT828ATQ is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy microprocessor address buffering, and high-density data acquisition front-ends requiring stable component supply and long-term lifecycle support.
Supply support for PI74FCT828ATQ 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 (now part of Diodes Incorporated) specialized in high-speed interface and timing solutions for communications, computing, and industrial markets before its 2016 acquisition.
The PI74FCT series was engineered for drop-in replacement of bipolar FAST™ logic in 5V systems-delivering higher speed, lower power, and enhanced signal integrity through integrated design features like on-die termination and hysteresis.
FAQ
Is PI74FCT828ATQ pin-compatible with 74F240?
Yes-PI74FCT828ATQ uses the same 24-pin TQSOP footprint and pinout as 74F240, including identical D0–D9, Y0–Y9, OE1/OE2, VCC, and GND assignments. This enables direct mechanical and routing compatibility in existing designs, though electrical behavior differs due to integrated 25Ω resistors and hysteresis.
What is the maximum capacitive load this device can drive reliably?
PI74FCT828ATQ is characterized up to CL = 300 pF in switching tests (tPHL/tPLH measured at CL = 300 pF), and its 25Ω series resistor provides optimal damping for loads ≤ 50 pF on PCB traces. For heavier loads, ensure trace impedance and length are modeled to avoid overshoot; total net capacitance should remain ≤ 100 pF for guaranteed timing compliance.
Can OE1 and OE2 be tied together for single-enable operation?
Yes-OE1 and OE2 may be connected to a common control signal. Since they are NAND-ed internally, tying them together preserves standard three-state behavior: low enables outputs, high disables them. No additional logic is needed, and timing parameters (tPZH, tPHZ) remain valid per datasheet test conditions.
Does this device support hot-swap or live-insertion?
No-PI74FCT828ATQ is not hot-swap rated. Its absolute maximum ratings do not include undershoot/overshoot protection beyond –0.5 V to +7.0 V on I/O pins, and no current-limiting or precharge circuitry is integrated. Use external protection (e.g., series resistors, TVS diodes) if insertion into a live backplane is required.
PI74FCT828ATQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74FCT
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 48mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
PI74FCT828ATQ FAQ
1.How can I place an order for PI74FCT828ATQ through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74FCT828ATQ 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 PI74FCT828ATQ reliable?
The price and inventory of PI74FCT828ATQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74FCT828ATQ is usually 5 days.
3.What payment methods are accepted for PI74FCT828ATQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74FCT828ATQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74FCT828ATQ?
PI74FCT828ATQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74FCT828ATQ 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 PI74FCT828ATQ?
For technical support, including PI74FCT828ATQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74FCT828ATQ requirements.
6.How does Aetrix verify that PI74FCT828ATQ is sourced from the original manufacturer or authorized distributors?
All PI74FCT828ATQ 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 PI74FCT828ATQ meets industry standards.
7.What is the process for return or replacement of PI74FCT828ATQ?
All PI74FCT828ATQ units undergo pre-shipment inspection (PSI). If there is an issue with PI74FCT828ATQ, 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 PI74FCT828ATQ part is unused and in its original packaging.
Return procedure for PI74FCT828ATQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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