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X40420V14IZ-A

Description
2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14
Categoryaccessories   
File Size384KB,25 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
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X40420V14IZ-A Overview

2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14

®
X40420, X40421
4kbit EEPROM
Data Sheet
May 25, 2006
FN8117.1
PRELIMINARY
Dual Voltage Monitor with Integrated CPU
Supervisor and System Battery Switch
FEATURES
• Dual voltage detection and reset assertion
—Three standard reset threshold settings
(4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V)
—V
TRIP2
programmable down to 0.9V
—Adjust low voltage reset threshold voltages
using special programming sequence
—Reset signal valid to V
CC
= 1V
—Monitor two voltages or detect power fail
• Battery switch backup
• V
OUT
: 5mA to 50mA from V
CC
; or 250µA from
V
BATT
• 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)
• Debounced manual reset input
• Low power CMOS
—25µA typical standby current, watchdog on
—6µA typical standby current, watchdog off
—1µA typical battery current in backup mode
• 4Kbits of EEPROM
—16 byte page write mode
—Self-timed write cycle
—5ms write cycle time (typical)
• Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Block lock protect 0 or 1/2, of EEPROM
• 400kHz 2-wire interface
• 2.7V to 5.5V power supply operation
• Available packages
—14 Ld SOIC, TSSOP
• Pb-free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
V2MON
Monitor voltages: 5V to 1.6V
Memory security
Battery switch backup
V
OUT
5mA to 50mA
APPLICATIONS
• Communications equipment
—Routers, hubs, switches
—Disk arrays
• Industrial systems
—Process control
—Intelligent instrumentation
• Computer systems
—Desktop computers
—Network servers
X40420, X40421
Standard V
TRIP1
Level
4.6V (±1%)
4.6V (±1%)
2.9V(±1.7%)
Standard V
TRIP2
Level
2.9V(±1.7%)
2.6V (±2%)
1.6V (±3%)
Suffix
-A
-B
-C
See “Ordering Information” for more details
For Custom Settings, call Intersil.
DESCRIPTION
The X40420, X40421 combines power-on reset con-
trol, watchdog timer, supply voltage supervision, and
secondary supervision, manual reset, and Block
Lock
protect serial EEPROM 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.
+
V2 Monitor
Logic
-
V
OUT
V
TRIP2
V2FAIL
SDA
WP
Data
Register
Command
Decode Test
& Control
Logic
Fault Detection
Register
Status
Register
EEPROM
Array
V
OUT
Watchdog
and
Reset Logic
V
OUT
WDO
MR
RESET
X40420
RESET
X40421
SCL
V
CC
(V1MON)
+
V
CC
Monitor
Logic
-
V
TRIP1
Power-on,
Manual Reset
Low Voltage
Reset
Generation
BATT-ON
V
OUT
V
BATT
System
Battery
Switch
LOWLINE
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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