DATASHEET
X5163, X5165
CPU Supervisor with 16Kbit SPI EEPROM
FN8128
Rev 4.00
August 13, 2015
Description
Features
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.
• Selectable watchdog timer
• Low VCC detection and reset assertion
- Five standard reset threshold voltages
- Re-program low VCC reset threshold voltage using
special programming sequence
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.
- Reset signal valid to VCC = 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
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.
• 16kbits of EEPROM
• Built-in inadvertent write protection
The device’s low VCC detection circuitry protects the user’s
system from low voltage conditions, resetting the system when
- Power-up/power-down protection circuitry
- Protect 0, 1/4, 1/2 or all of EEPROM array with Block
Lock™ protection
VCC falls below the minimum VCC trip point. RESET/RESET is
asserted until VCC returns to proper operating level and
stabilizes. Five industry standard VTRIP 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.
- 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)
Pinouts
14 Ld TSSOP
X5163, X5165
8 Ld SOIC/PDIP
X5163, X5165
CS/WDI
V
1
2
3
4
5
6
7
14
13
12
11
10
9
CC
SO
NC
RESET/RESET
V
1
8
CS/WDI
SO
CC
NC
NC
NC
SCK
SI
2
3
7
6
RESET/RESET
SCK
NC
NC
WP
X5163, X5165
WP
V
SS
4
5
SI
V
SS
8
FN8128 Rev 4.00
August 13, 2015
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