X5001P INTERSIL [Intersil Corporation], X5001P Datasheet

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X5001P

Manufacturer Part Number
X5001P
Description
CPU Supervisor
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet

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CPU Supervisor
FEATURES
• 200ms power-on reset delay
• Low V
• Selectable nonvolatile watchdog timer
• Long battery life with low power consumption
• 2.7V to 5.5V operation
• SPI mode 0 interface
• Built-in inadvertent write protection
• High reliability
• Available packages
BLOCK DIAGRAM
CS/WDI
—Five standard reset threshold voltages
—Adjust low V
—Reset signal valid to V
—0.2, 0.6, 1.4 seconds
—Off selection
—Select settings through software
—<50µA max standby current, watchdog on
—<1µA max standby current, watchdog off
—Power-up/power-down protection circuitry
—Watchdog change latch
—8-lead TSSOP
—8-lead SOIC
—8 pin PDIP
V
SCK
CC
SO
special programming sequence
SI
CC
detection and reset assertion
CC
reset threshold voltage using
®
Command
Decode &
1
Register
Control
Logic
CC
Data
= 1V
Data Sheet
V
TRIP
Watchdog
Transition
Detector
1-888-INTERSIL or 1-888-352-6832
+
-
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
DESCRIPTION
This device combines three popular functions, Power-
on Reset, Watchdog Timer, and Supply Voltage
Supervision in one package. This combination lowers
system cost, reduces board space requirements, and
increases reliability.
The watchdog timer provides an independent protec-
tion mechanism for microcontrollers. During a system
failure, the device will respond with a RESET signal
after a selectable time out interval. The user selects the
interval from three preset values. Once selected, the
interval does not change, even after cycling the power.
The user’s system is protected from low voltage condi-
tions by the device’s low V
V
is reset. RESET is asserted until V
operating levels and stabilizes. Five industry standard
V
unique circuits allow the threshold to be reprogrammed
to meet custom requirements or to fine-tune the thresh-
old for applications requiring higher precision.
The device utilizes Intersil’s proprietary Direct Write
cell for the watchdog timer control bits and the V
storage element, providing a minimum endurance of
100,000 write cycles and a minimum data retention of
100 years.
CC
TRIP
falls below the minimum V
Low Voltage
Generation
Watchdog
Watchdog
Power-on/
Timebase
thresholds are available, however, Intersil’s
All other trademarks mentioned are the property of their respective owners.
Reset &
REset
Timer
April 6, 2005
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
CC
detection circuitry. When
CC
trip point, the system
CC
returns to proper
X5001
FN8125.0
RESET
TRIP

Related parts for X5001P

X5001P Summary of contents

Page 1

Data Sheet CPU Supervisor FEATURES • 200ms power-on reset delay • Low V detection and reset assertion CC —Five standard reset threshold voltages —Adjust low V reset threshold voltage using CC special programming sequence —Reset signal valid to V ...

Page 2

PIN CONFIGURATION 8-Lead TSSOP RESET CS/WDI PIN DESCRIPTION Pin Pin (SOIC/PDIP) TSSOP Name 1 1 CS/WDI SCK ...

Page 3

PRINCIPLES OF OPERATION Power-on Reset Application of power to the X5001 activates a power- on reset circuit. This circuit goes active at 1V and pulls the RESET/RESET pin active. This signal prevents the system microprocessor from starting to operate with ...

Page 4

Figure 1. Sample V Reset Circuit TRIP V P Adjust V TRIP Adj. Run Figure 2. Set V Level Sequence (V TRIP SCK SI 03h Figure ...

Page 5

Figure 4. V Programming Sequence TRIP New V Applied = CC Old V Applied + Error CC SPI INTERFACE The device is designed to interface directly with the synchronous Serial Peripheral Interface (SPI) of many popular microcontroller families. The device ...

Page 6

Watchdog Timer Register Watchdog Timer Control Bits The watchdog timer control bits, WD select the watchdog time out period. These nonvola- tile bits are programmed with the set ...

Page 7

Figure 5. Read Watchdog Timer Setting SCK RWDT Instruction SI SO Figure 6. Enable Watchdog Change/Disable Watchdog Change Sequence CS SCK SI SO Figure 7. Write Watchdog Timer Sequence CS 0 SCK SI High ...

Page 8

Figure 8. Read Nonvolatile Status (Option 1) (Used to determine end of Watchdog Timer store operation SCK SI SO Figure 9. Read Nonvolatile Status (Option 2) (Used to determine end of Watchdog Timer store operation ...

Page 9

ABSOLUTE MAXIMUM RATINGS Temperature under bias ................... -65°C to +135°C Storage temperature ........................ -65°C to +150°C Voltage on any pin with respect to V ...................................... -1.0V to +7V SS D.C. output current ............................................... 5mA Lead temperature (soldering, 10 seconds) ........ ...

Page 10

POWER-UP TIMING Symbol Parameter (2) t Power-up to read operation PUR (2) t Power-up to write operation PUW CAPACITANCE T = +25° 1MHz Symbol (2) C Output capacitance (SO, RESET) OUT (2) C Input capacitance (SCK, ...

Page 11

Data Output Timing Symbol Parameter f Clock frequency SCK t Output disable time DIS t Output valid from clock low V t Output hold time HO (3) t Output rise time RO (3) t Output fall time FO Notes: (3) ...

Page 12

... CC RESET (X5001) RESET Output Timing Symbol V Reset trip point voltage, X5001PT-4.5A TRIP Reset trip point voltage, X5001PT-4.5 Reset trip point voltage, X5001PT-2.7A Reset trip point voltage, X5001PT-2.7 Reset trip point voltage, X5001PT-1.8 t Power-up reset timeout PURST ( detect to reset/output RPD CC (5) ...

Page 13

Figure 13. CS vs. RESET Timing CS RESET RESET Output Timing Symbol Parameter t Watchdog timeout period, WDO pulse width ...

Page 14

V Programming Parameters TRIP Parameter t V program enable voltage setup time VPS TRIP t V program enable voltage hold time VPH TRIP t V programming CS inactive time PCS TRIP t V setup time TSU TRIP t V hold ...

Page 15

V Supply Current vs. Temperature (I CC Watchdog Timer Watchdog Timer Watchdog Timer Off (V CC 0.55 0.35 -40C 25C Temp (c) V vs. Temperature (programmed at 25°C) TRIP 5.025 5.000 ...

Page 16

PACKAGING INFORMATION 8-Lead Plastic Small Outline Gull Wing Package Type S Pin 1 Index 0.050 (1.27) 0.010 (0.25) 0.020 (0.50) 0° - 8° 0.016 (0.410) 0.037 (0.937) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 16 X5001 Pin 1 ...

Page 17

PACKAGING INFORMATION 0° - 8° .019 (.50) .029 (.75) Detail A (20X) See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 17 X5001 8-Lead Plastic, TSSOP, Package Type V .025 (.65) BSC .169 (4.3) .252 (6.4) BSC ...

Page 18

... TRIP = 4.25-4.5V TRIP Blank = 4.5 to 5.5V +70° 4.25-4. 4.5 to 5.5V, -40 to +85°C, V TRIP = 4.5-4.75V AL = 4.5 to 5.5V +70°C, V TRIP = 4.5-4.75V AM = 4.5 to 5.5V, -40 to +85°C, V TRIP Part Number RESET (Active LOW) X5001P-4.5A X5001S8-4.5A X5001V8-4.5A X5001P X5001S8 X5001V8 X5001S8-2.7A X5001S8-2.7 X5001V8-2.7 = 1.7-1.8V TRIP = 1.7-1.8V TRIP = 2.55-2.7V TRIP = 2.55-2.7V TRIP = 2.85-3.0V TRIP = 2.85-3.0V TRIP = 4 ...

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