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D8279C-2
Keyboard Controller, Mos, DIP, 40PIND8279C-2
Keyboard Controller, Mos, DIP, 40PIN
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
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D8279C-2 DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
GENERAL DESCRIPTIONThe AD8278 and AD8279 are general-purpose difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. The AD8278 and AD8279 provide exceptional commonmode rejection ratio (80 dB) and high bandwidth while amplifying input signals that are well beyond the supply rails. The on-chip resistors are laser trimmed for excellent gain accuracy and high CMRR. They also have extremely low gain drift vs. temperature.FEATURES Wide input range beyond supplies Rugged input overvoltage protection Low supply current: 200 μA maximum (per amplifier) Low power dissipation: 0.5 mW at VS = 2.5 V Bandwidth: 1 MHz (G = ½) CMRR: 80 dB minimum, dc to 20 kHz (G = ½, B Grade) Low offset voltage drift: ±1 μV/°C maximum (B Grade) Low gain drift: 1 ppm/°C maximum (B Grade) Enhanced slew rate: 1.4 V/μs Wide power supply range Single supply: 2 V to 36 V Dual supplies: ±2 V to ±18 V 8-lead SOIC, 14-lead SOIC, and 8-lead MSOP packagesAPPLICATIONS Voltage measurement and monitoring Current measurement and monitoring Instrumentation amplifier building block Portable, battery-powered equipment Test and measurement
Key Features
- Wide input range beyond supplies
- Rugged input overvoltage protection
- Low supply current: 200 μA maximum (per amplifier)
- Low power dissipation: 0.5 mW at VS = 2.5 V
- Bandwidth: 1 MHz (G = ½)
- CMRR: 80 dB minimum, dc to 20 kHz (G = ½, B Grade)
- Low offset voltage drift: ±1 μV/°C maximum (B Grade)
- Low gain drift: 1 ppm/°C maximum (B Grade)
- Enhanced slew rate: 1.4 V/μs
- Wide power supply range
- Single supply: 2 V to 36 V
- Dual supplies: ±2 V to ±18 V
- 8-lead SOIC, 14-lead SOIC, and 8-lead MSOP packages
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Manufacturer | NEC | Product Category ! | IC Chips |
FAQs
What is D8279C-2?
The D8279C-2 is a programmable keyboard/display interface designed by Intel. It is commonly used in embedded systems and computer peripherals to interface with keyboards, displays, and other input/output devices. The device provides versatile interfacing capabilities for a wide range of applications.
How Does D8279C-2 Work?
The D8279C-2 works by providing parallel connections to a keyboard and display, allowing microprocessor-based systems to communicate with and control these input and output devices. It supports scanning of key switches, debouncing of key closures, and encoding of key closures into a 8-bit binary code. It also facilitates interfacing with various types of display units.
How Many Pins does D8279C-2 have and What are the Functions of the Pinout Configuration?
The D8279C-2 is housed in a 40-pin DIP (Dual Inline Package) package. The pinout configuration includes:
- IRQ: Interrupt request output.
- CS: Chip select input.
- RD: Read input.
- WR: Write input.
- A0-A3: Address inputs.
- BD0-BD7: Bidirectional data bus.
- CLK: System clock input.
- RESET: Reset input.
- VCC, GND: Power supply and ground pins.
What are the Pros and Cons of D8279C-2?
Pros:
- Versatile Interface: Provides comprehensive interfacing capabilities for keyboards and displays.
- Scanning and Debouncing: Supports key switch scanning and debouncing for reliable input.
- Addressable: Can be addressed by the microprocessor to allow multiple D8279C-2 devices in a system.
- Integrated Functions: Combines keyboard and display interfacing functions into a single device.
- Compatibility: Designed for compatibility with a wide range of microprocessors and systems.
Cons:
- Complexity: May require careful programming and configuration for specific applications.
- Availability: As an older Intel product, availability may be limited or subject to obsolescence.
- External Components: May require additional support circuitry for optimal performance in certain applications.
Are There Any Equivalents/Alternatives to D8279C-2 for Recommendation?
- The i8042 keyboard controller is a functional equivalent to the D8279C-2 and is commonly used in modern systems.
- Alternatives to the D8279C-2 include custom keyboard/display interface solutions based on microcontroller platforms.
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