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Operating Temperature Under Bias: | 0 To +70 Or –40 To +85 °C | Storage Temperature: | –65 To +150 °C |
---|---|---|---|
Voltage On EA/Vpp Pin To Vss: | 0 To +13.0 V | Voltage On Any Other Pin To Vss: | –0.5 To +6.5 V |
Maximum IOL Per I/O Pin: | 15 MA | Power Dissipation: | 1.5 W |
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80C51/87C51/80C31
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless low voltage (2.7V–5.5V), low power, high speed (33 MHz)
DESCRIPTION
The Philips 8XC51/31 is a high-performance static 80C51 design fabricated with Philips high-density CMOS technology with operation from 2.7V to 5.5V.
The 8XC51/31 contains a 4k × 8 ROM, a 128 × 8 RAM, 32 I/O lines, three 16-bit counter/timers, a six-source, four-priority level nested interrupt structure, a serial I/O port for either multi-processor communications, I/O expansion or full duplex UART, and on-chip oscillator and clock circuits.
In addition, the device is a low power static design which offers a wide range of operating frequencies down to zero. Two software selectable modes of power reduction—idle mode and power-down mode are available. The idle mode freezes the CPU while allowing the RAM, timers, serial port, and interrupt system to continue functioning.
The power-down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative. Since the design is static, the clock can be stopped without loss of user data and then the execution resumed from the point the clock was stopped.
FEATURES
• 8051 Central Processing Unit
– 4k × 8 ROM (80C51)
– 128 × 8 RAM
– Three 16-bit counter/timers
– Boolean processor
– Full static operation
– Low voltage (2.7V to 5.5V@ 16MHz) operation
• Memory addressing capability
– 64k ROM and 64k RAM
• Power control modes:
– Clock can be stopped and resumed
– Idle mode
– Power-down mode
• CMOS and TTL compatible
• TWO speed ranges at VCC = 5V
– 0 to 16MHz
– 0 to 33MHz
• Three package styles
• Extended temperature ranges
• Dual Data Pointers
• Security bits:
– ROM (2 bits)
– OTP/EPROM (3 bits)
• Encryption array—64 bytes
• 4 level priority interrupt
• 6 interrupt sources
• Four 8-bit I/O ports
• Full–duplex enhanced UART
– Framing error detection
– Automatic address recognition
• Programmable clock out
• Asynchronous port reset
• Low EMI (inhibit ALE)
• Wake-up from Power Down by an external interrupt (8XC51)
ABSOLUTE MAXIMUM RATINGS1, 2, 3
PARAMETER | RATING | UNIT |
Operating temperature under bias | 0 to +70 or -40 to +85 | °C |
Storage temperature range | –65 to +150 | °C |
Voltage on EA/VPP pin to VSS | 0 to +13.0 | V |
Voltage on any other pin to VSS | –0.5 to +6.5 | V |
Maximum IOL per I/O pin | 15 | mA |
Power dissipation (based on package heat transfer limitations, not device power consumption) |
1.5 | W |
NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section of this specification is not implied.
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maximum.
3. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise noted.
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