S87C654-5A44

The S87C654-5A44 is a kind of single-chip 8-Bit microcontroller.S87C654-5A44 has the same instruction set as the 80C51. The S87C654-5A44 contains a non-volatile 16k * 8 EPROM, a volatile 256 * 8 read/write data memory, four 8-bit I/O ports, two 16-bit timer/event counters (identical to the timers of the 80C51), a multi-source, two-priority-level, nested interrupt structure, an I2C interface, UART and on-chip oscillator and timing circuits. Besides, it is available in plastic leaded chip carrier.

There are some features of S87C654-5A44 as follows: (1)80C51 central processing unit; (2)6k * 8 EPROM expandable externally to 64k bytes; (3)256 * 8 RAM, expandable externally to 64k bytes; (4)two standard 16-bit timer/counters; (5)four 8-bit I/O ports; (6)I2C-bus serial I/O port with byte oriented; (7)master and slave functions; (8)full-duplex UART facilities; (9)power control modes: idle mode and power-down mode; (10)extended temperature range: -40 to +85 ; (11)OTP package available; (12)speed range: 16MHz.

What comes next is about the maximum ratings of S87C654-5A44: (1)storage temperature range: -65 to +150 ; (2)voltage on EA/VPP to VSS: -0.5 to + 13 V; (3)voltage on any other pin to VSS: -0.5 to + 6.5 V; (4)input, output current on any single pin: ±5 mA; (5)power dissipation (based on package heat transfer limitations, not device power consumption): 1 W.