X40010 Datasheet, PDF (1/24 Pages) Xicor Inc. – Dual Voltage Monitor with Integrated CPU Supervisor

®
Data Sheet
X40010, X40011, X40014, X40015
March 28, 2005
FN8111.0
Dual Voltage Monitor with Integrated CPU
Supervisor
FEATURES
• Dual voltage detection and reset assertion
—Standard reset threshold settings
See Selection table on page 2.
—Adjust low voltage reset threshold voltages
using special programming sequence
—Reset signal valid to V_CC = 1V
—Monitor three voltages or detect power fail
• Independent Core Voltage Monitor (V2MON)
• Fault detection register
• Selectable power on reset timeout (0.05s,
0.2s, 0.4s, 0.8s)
• Selectable watchdog timer interval (25ms,
200ms,1.4s, off)
• Low power CMOS
—25µA typical standby current, watchdog on
—6µA typical standby current, watchdog off
• 400kHz 2-wire interface
• 2.7V to 5.5V power supply operation
• Available packages
—8-lead SOIC, TSSOP
• Monitor Voltages: 5V to 0.9V
• Independent Core Voltage Monitor
APPLICATIONS
• Communication Equipment
—Routers, Hubs, Switches
—Disk Arrays, Network Storage
• Industrial Systems
—Process Control
—Intelligent Instrumentation
• Computer Systems
— Computers
—Network Servers
DESCRIPTION
The X40010/11/14/15 combines power-on reset con-
trol, watchdog timer, supply voltage supervision, and
secondary voltage supervision, in one package. This
combination lowers system cost, reduces board space
requirements, and increases reliability.
Applying voltage to V_CC activates the power on reset
circuit which holds RESET/RESET active for a period of
time. This allows the power supply and system oscilla-
tor to stabilize before the processor can execute code.
BLOCK DIAGRAM
SDA
SCL
V_CC
(V1MON)
V2MON
Data
Register
Command
Decode Test
& Control
Logic
Threshold
Reset Logic
Fault Detection
Register
Status
Register
Watchdog Timer
and
Reset Logic
User Programmable
V_TRIP1
User Programmable
V_TRIP2
+
-
V2MON
+ ^VCC
Power on,
Low Voltage
Reset
Generation
-
*X40010/11 = V2MON*
X40014/15 = V_CC
WDO
RESET
X40010/14
RESET
X40011/15
V2FAIL
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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