1
FN8128.4
X5163, X5165
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.
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)
Pinouts
8 Ld SOIC/PDIP
CS/WDI
WP
SO
1
2
3
4
RESET
/RESET
8
7
6
5
V
CC
14 Ld TSSOP
SO
WP
V
SS
1
2
3
4
5
6
7
RESET
/RESET
SCK
SI
14
13
12
11
10
9
8
NC
V
CC
NC
X5163, X5165
V
SS
SCK
CS/WDI
NC
NC
NC
NC
SI
X5163, X5165
X5163, X5165
Data Sheet August 13, 2015
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas LLC 2005, 2006, 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
