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onsemi 74F828SPC
- Part No.:
- 74F828SPC
- Manufacturer:
- onsemi
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
74F828SPC.pdf
- Description:
- IC BUFFER INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,289
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Product details
Overview
74F828SPC from Fairchild Semiconductor is a 10-bit inverting bus buffer/line driver with dual NOR-type output enables (OE1, OE2), 3-STATE outputs, ±64 mA sink/source capability, and operation over 0°C to +70°C at 4.5–5.5 V supply. It serves as a memory address or clock driver in wide-bus systems requiring high fan-out and board-density optimization.
For engineers reviewing the 74F828SPC datasheet, pinout, applications, or equivalent options, key selection considerations include its inverting logic function, dual 3-STATE control, 5.5 ns max propagation delay (tPHL), 9.5 ns max output enable time (tPZL), and PDIP-24 package compatibility with legacy through-hole layouts.
Technical Context
The 74F828SPC implements TTL-compatible 10-bit inverting buffering with two independent NOR-gated output enable inputs-OE1 and OE2-requiring both LOW to activate transparent data flow. Its outputs drive heavy loads (64 mA sink) while maintaining fast switching: tPHL ≤ 4.0 ns (typ), tPLH ≤ 5.0 ns (typ) at VCC = 5.0 V, CL = 50 pF.
Input clamp diodes suppress transmission-line ringing; input thresholds are VIH ≥ 2.0 V and VIL ≤ 0.8 V. Power consumption varies by output state: ICCH = 20 mA (max, HIGH), ICCL = 85 mA (max, LOW), ICCZ = 50 mA (max, HIGH-Z), enabling predictable thermal design in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Inverting 10-bit buffer with dual NOR output enables |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL systems |
| Propagation Delay | tPHL ≤ 4.0 ns (max @ 0°C–+70°C) - supports >200 MHz bus timing margins |
| Output Drive | Sinks 64 mA / sources 15 mA - drives terminated lines or multiple TTL inputs |
| Operating Temp | 0°C to +70°C ambient - commercial-grade temperature range |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures robust noise immunity in mixed-signal environments |
| Power Supply Current | ICCL = 85 mA (max, all outputs LOW) - defines worst-case supply rail loading |
Pinout & Package
74F828SPC is housed in a 24-lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" wide, with through-hole mounting and standard 0.1" pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 11 | Data Inputs (D0–D9) | Inverted logic inputs; each accepts TTL-level signals with 20 µA HIGH/−0.6 mA LOW input current |
| 12, 13, 14, 15, 16, 17, 18, 19, 20, 22 | Data Outputs (O0–O9) | 3-STATE inverting outputs; sink up to 64 mA, source up to 15 mA |
| 10, 21 | Output Enable (OE1, OE2) | NOR-gated enables - both must be LOW for output activation; HIGH places outputs in high-impedance state |
| 24 | VCC | +4.5 V to +5.5 V power supply connection |
| 12 | GND | Ground reference for all I/O and internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 10-bit buffering | Provides polarity-corrected signal routing for parity buses and address latching without external inverters |
| Dual NOR output enables | Enables hierarchical bus control - e.g., local enable + global enable - reducing external gating logic |
| 64 mA output sink capability | Drives long traces, unterminated stubs, or up to 20 standard TTL loads directly |
| Input clamp diodes | Suppresses overshoot/ringing on fast edges, improving signal integrity in high-speed backplanes |
| Low propagation delay variation | tPHL/tPLH spread ≤ 1.0 ns (typ) across all 10 channels - maintains skew-critical timing alignment |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 10-bit address bus between microprocessor and multi-chip memory module in industrial PLC controller. IC Role / Device Role / Timing Role: Inverting address buffer with dual OE control synchronizing chip-select handshaking. Use Value: Eliminates need for discrete inverters; 64 mA drive sustains signal integrity across 6-inch PCB trace lengths. | Use Scenario: Distributing a system clock to 10 peripheral ICs (UARTs, timers, ADCs) on a single-layer industrial board. IC Role / Device Role / Timing Role: Low-skew inverting clock driver with 3-STATE capability for dynamic clock gating. Use Value: 4.0 ns max tPHL and <1 ns inter-output skew ensure synchronous sampling across peripherals. |
| Parity Bus Interface | Legacy Bus Transceiver Support |
Use Scenario: Buffering 10-bit parity bits generated by ECC logic before transmission over ISA-style expansion bus. IC Role / Device Role / Timing Role: Inverting parity line driver with OE-controlled tri-state for bidirectional bus arbitration. Use Value: Input clamp diodes suppress reflections on unterminated 100 Ω parallel bus; 0.8 V VIL rejects noise during hot-plug events. | Use Scenario: Interfacing vintage 8086-based CPU board with modern FPGA-based peripheral card via shared 10-bit data path. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled bus driver supporting legacy 5 V TTL signaling. Use Value: 5.5 V absolute max input voltage tolerates transient coupling; PDIP-24 footprint matches original socket layout. |
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 |
|---|---|---|---|
| SN74F240N | Octal (8-bit), non-inverting, single OE; no dual-NOR enable architecture | Lacks 10-bit width and inverting function - requires external inversion for parity paths | Use only if bus width reduced to 8 bits and inversion handled elsewhere |
| 74ACT1024PC | 10-bit inverting, but CMOS (ACT) logic - higher noise margin, lower ICC, 4.5–5.5 V compatible | Superior speed (tPLH ≤ 3.5 ns) and lower power (ICCZ ≤ 10 µA), but no input clamp diodes | Prefer for new designs needing lower static current and tighter timing; verify signal integrity without clamps |
Compared with SN74F240N and 74ACT1024PC, the 74F828SPC uniquely delivers 10-bit inverting buffering with dual-NOR enables and integrated input clamping - critical for legacy 5 V bus systems where reflection suppression and hierarchical enable control are required.
Availability
74F828SPC is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, parity bus interfaces, and legacy bus transceiver support requiring stable component supply and through-hole manufacturability.
Supply support for 74F828SPC 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
Fairchild Semiconductor was a U.S.-based designer of high-performance analog and digital semiconductors, acquired by ON Semiconductor in 2016; known for industry-standard logic families and robust industrial-grade ICs.
The 74F828SPC belongs to the 74F Fast TTL logic family, engineered for high-speed bus interface applications demanding low propagation delay, high drive strength, and reliable operation in commercial-temperature industrial control systems.
FAQ
What is the logic function of the 74F828SPC?
The 74F828SPC is a 10-bit inverting buffer with dual NOR-gated output enables (OE1 and OE2). When both enables are LOW, each input Dn is inverted and appears at output On; when either enable is HIGH, all outputs enter high-impedance state. This differs from the non-inverting 74F827SPC and supports polarity-sensitive bus architectures like parity generation.
Does the 74F828SPC support 3-STATE operation?
Yes, the 74F828SPC provides true 3-STATE outputs controlled by OE1 and OE2. Both pins must be LOW to enable output drivers; asserting either HIGH forces all 10 outputs (O0–O9) into high-impedance mode. This allows safe bus sharing in multi-driver systems and eliminates contention during data direction changes.
What is the maximum output sink current for the 74F828SPC?
The 74F828SPC guarantees a minimum output sink current of 64 mA per output (IOL) under specified conditions (VCC = 5.0 V, TA = 0°C to +70°C). This rating enables direct driving of multiple TTL loads, terminated transmission lines, or LED indicators without external buffers - verified in DC Electrical Characteristics table of the official datasheet.
Is the 74F828SPC compatible with 5 V TTL systems?
Yes, the 74F828SPC operates from 4.5 V to 5.5 V and features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output voltage levels (VOH ≥ 2.4 V at −3 mA, VOL ≤ 0.55 V at 64 mA). Its AC characteristics, including 4.0 ns max tPHL, are characterized at VCC = 5.0 V and CL = 50 pF - confirming full interoperability with standard 5 V TTL buses.
What package type does the 74F828SPC use?
The 74F828SPC uses a 24-lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" wide, with standard 0.1" pin spacing. This through-hole package supports wave soldering, prototyping on breadboards, and drop-in replacement in legacy systems originally designed for 74F-series DIP logic - distinct from the SOIC variant (74F828SC).
74F828SPC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74F
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 3mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
74F828SPC FAQ
1.How can I place an order for 74F828SPC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74F828SPC 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 74F828SPC reliable?
The price and inventory of 74F828SPC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74F828SPC is usually 5 days.
3.What payment methods are accepted for 74F828SPC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74F828SPC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74F828SPC?
74F828SPC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74F828SPC 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 74F828SPC?
For technical support, including 74F828SPC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74F828SPC requirements.
6.How does Aetrix verify that 74F828SPC is sourced from the original manufacturer or authorized distributors?
All 74F828SPC 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 74F828SPC meets industry standards.
7.What is the process for return or replacement of 74F828SPC?
All 74F828SPC units undergo pre-shipment inspection (PSI). If there is an issue with 74F828SPC, 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 74F828SPC part is unused and in its original packaging.
Return procedure for 74F828SPC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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