X5163S8IZT1 Datasheet, PDF (1/22 Pages) Intersil Corporation – Selectable watchdog timer

Data Sheet
X5163, X5165
August 13, 2015
FN8128.4
CPU Supervisor with 16Kbit SPI EEPROM
Description
These devices combine four popular functions, Power-on
Reset Control, Watchdog Timer, Supply Voltage Supervision,
and Block Lock Protect Serial EEPROM Memory in one
package. This combination lowers system cost, reduces
board space requirements, and increases reliability.
Applying power to the device activates the power-on reset
circuit which holds RESET/RESET active for a period of
time. This allows the power supply and oscillator to stabilize
before the processor can execute code.
The Watchdog Timer provides an independent protection
mechanism for microcontrollers. When the microcontroller
fails to restart a timer within a selectable time out interval, the
device activates the RESET/RESET signal. The user selects
the interval from three preset values. Once selected, the
interval does not change, even after cycling the power.
The device’s low V_CC detection circuitry protects the user’s
system from low voltage conditions, resetting the system when
V_CC falls below the minimum V_CC trip point. RESET/RESET is
asserted until V_CC returns to proper operating level and
stabilizes. Five industry standard V_TRIP thresholds are
available, however, Intersil’s unique circuits allow the
threshold to be reprogrammed to meet custom requirements
or to fine-tune the threshold for applications requiring higher
precision.
Pinouts
CS/WDI
SO
WP
V_SS
8 Ld SOIC/PDIP
X5163, X5165
1
8
2
7
3 ^{X5163, X5165} 6
4
5
V_CC
RESET/RESET
SCK
SI
Features
• Selectable watchdog timer
• Low V_CC detection and reset assertion
- Five standard reset threshold voltages
- Re-program low V_CC reset threshold voltage using
special programming sequence
- Reset signal valid to V_CC = 1V
• Determine watchdog or low voltage reset with a volatile
flag bit
• Long battery life with low power consumption
- <50µA max standby current, watchdog on
- <1µA max standby current, watchdog off
- <400µA max active current during read
• 16kbits of EEPROM
• Built-in inadvertent write protection
- Power-up/power-down protection circuitry
- Protect 0, 1/4, 1/2 or all of EEPROM array with Block
Lock^™ protection
- In-circuit programmable ROM mode
• 2MHz SPI interface modes (0,0 & 1,1)
• Minimize EEPROM programming time
- 32-byte page write mode
- Self-timed write cycle
- 5ms write cycle time (typical)
• 2.7V to 5.5V and 4.5V to 5.5V power supply operation
• Available packages: 14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
• Pb-free plus anneal available (RoHS compliant)
CS/WDI
SO
NC
NC
NC
WP
V_SS
14 Ld TSSOP
X5163, X5165
1
14
2
13
3
12
4
11
5
10
6
9
7
8
V_CC
RESET/RESET
NC
NC
NC
SCK
SI
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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