OB5515 is a main control chip that integrates high-voltage process and digital-analog hybrid technology, which is used in wall breaker products. The OB5515 features a fast single-cycle 8051 core, 16KB flash memory, 256B+512B SRAM, and can execute all ASM51-compliant instructions with the same instruction settings as the MCS-51. The chip integrates analog modules such as DC Regulator, ADC, MOSFET, and zero-crossing detection circuit, which can directly drive 5 relays or thyristors, and the chip can operate below 12V of the system power supply.

Features

Command settings are compatible with MCS-51

16K bytes of on-chip flash program memory

256 bytes of standard 8052 RAM

512 bytes of SRAM

3 x 16-bit timers/counters (timers 0,1,2)

Up to 19 GPIOs

LED driver: 7 high-current COM ports, 12 SEG ports

External interrupt source: INTx 2

I2C x 1

UART x 1

Programmable Watchdog Timer (WDT)

8 channels 12-bit analog-to-digital conversion (ADC)

On-chip flash memory supports ICP and EEPROM functions

Low voltage interrupt LVI/low voltage reset LVR

Idle and power-down modes of power management unit

Support online simulation (OCD) function

On-chip oscillator:

HIRC: 16MHz, (±3%, -40°C~85°C)

LIRC: 23KHz, ±20%

High voltage simulation unit

Input voltage: 7.5V~12V

Integrated 5VLDO, output voltage: 5V ±2%@25°C. ±4%@ -40°C~85°C; Maximum output current: 200mA

Integrated 5 open-drain ports, 80mA current sink capability, built-in freewheeling diode

Integration of an op amp (OPA)

Integrated Two-Way Zero-Crossing Detection (ZD)

Package type: 28-SOP