X40237

Features:

• Triple Voltage Monitors
-User Programmable Threshold Voltage
-Power-on Reset (POR) Circuitry
-Software Selectable Reset timeout
-Manual Reset Input
• 2-Wire industry standard Serial Interface
• 2 kbit EEPROM with Write Protect & Block Lock^TM
• Digitally Controlled Potentiometers (DCP)




Application

The DCP of the X4023x may be utilized to software control analog voltages for:
LCD contrast, LCD purity, or Backlight control.
Power Supply settings such as PWM frequency,Voltage Trimming or Margining (temperature offset control).
Reference voltage setting (e.g. DDR-SDRAM SSTL-2)

The 2 kbit integrated EEPROM may be used to store ID, manufacturer data, maintenance data and module definition data.

The programmable POR circuit insures V_CC is stable before RESET is removed and protects against brown-outs and power failures. The programmable voltage monitors have on-chip independent reference alarm levels. With separate outputs, the voltage monitors can be used for power-on sequencing.

Pinout

Specifications

Parameter	Min.	Max.	Uints
Temperature under Bias	-65	+135	°C
Storage Temperature	-65	+150	°C
Voltage on WP pin (With respect to VSS)	-1.0	+15	V
Voltage on other pins (With respect to VSS)	-1.0	+7	V
Voltage on RHx - Voltage on RLx (x = 0,1,2. Referenced to VSS)		VCC	V
D.C. Output Current (SDA,RESETRESET,V2FAIL,V3FAIL)	0	5	mA
Lead Temperature (Soldering, 10 seconds)		300	°C
Supply Voltage Limits (Applied VCC voltage, referenced to VSS)	2.7	7	V

Description

The X40237 family of Integrated System Management ICs combine CPU Supervisor functions (VCC Power-onpower-on Reset (POR) circuitry, two additional programmable voltage monitor inputs with software and hardware indicators), integrated EEPROM with Block Lock™ protection and one or two Intersil Digitally Controlled Potentiometers (XDCP). All functions of the X40237 are accessed by an industry standard 2-Wire serial interface.