Product Status: Mass Production(*)
OVERVIEW
This device combines four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock 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
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
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 VCC
detection circuitry protects the user's system from low voltage conditions, resetting the system when VCC
falls below the minimum VCC
trip point. RESET
is asserted until VCC
returns to the 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 finetune the threshold for applications requiring higher precision.
KEY FEATURES
- Low VCC detection and reset assertion
- Four standard reset threshold voltages 4.63V, 4.38V, 2.93V, 2.63V
- Re-program low VCC reset threshold voltage using special programming sequence
- Reset signal valid to VCC = 1V
- Selectable time out watchdog timer
- 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
- 8Kbits of EEPROM
- Save critical data with Block Lock™ memory
- Block lock first or last page, any 1/4 or lower 1/2 of EEPROM array
- Built-in inadvertent write protection
- Write enable latch
- Write protect pin
- SPI Interface - 3.3MHz clock rate
- Minimize programming time
- 16 byte page write mode
- 5ms write cycle time (typical)
- SPI modes (0,0 & 1,1)
- Available packages
- 8 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
- Pb-free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
PARAMETRICS
Parameters
X5083
Basic Information
Production Status
Mass Production(*)
Supply Voltage Vs Range (V)
4.5 to 5.5, 4.5 to 5.5, 2.7 to 5.5, 2.7 to 5.5
Voltage Threshold 1 (V)
4.63 (2.8%), 4.38 (2.7%), 2.93 (2.7%), 2.63 (3%)
Reset Output Type
Active Low
Watchdog Timer
OFF, 0.2, 0.6, 1.4
Manual Reset
No
Bus/Output Interface
SPI
EEPROM Size
8 KBits
Battery Monitor and Switchover
No
Fault Detection Register
No
Suffix
-4.5A, Blank, -2.7A, -2.7
POR (ms)
200
RTC Function
No
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85