x40626 Intersil Corporation, x40626 Datasheet - Page 2

• Manufacturer Part Number: x40626
• Description: Dual Voltage Cpu Supervisor With 64k Serial Eeprom
• Manufacturer: Intersil Corporation

X40626
operating level and stabilizes. Four industry standard Vtrip
thresholds are available. However, Xicor’s unique circuits
allow the threshold to be reprogrammed to meet custom
requirements or to fine-tune the threshold for applications
requiring higher precision.
The memory portion of the device is a CMOS Serial
EEPROM array with Xicor’s Block Lock
array is internally organized as 64 bytes per page. The
device features an 2-wire interface and software protocol
allowing operation on an I
The device utilizes Xicor’s proprietary Direct Write
providing a minimum endurance of 100,000 page write
cycles and a minimum data retention of 100 years.
PIN FUNCTION
REV 1.1.15 2/11/04
1, 4, 6, 13
Pin
10
11
12
14
2
3
5
7
8
9
V2MON
RESET
V2FAIL
Name
SDA
SCL
V
V
WP
NC
S
S
CC
SS
0
1
2
C bus.
No Internal Connections
Device Select Input
Device Select Input
Reset Output . RESET is an active LOW, open drain output which goes active whenever V
falls below the minimum V
imum V
enabled and SDA remains either HIGH or LOW longer than the selectable Watchdog time-
out period. A falling edge on SDA, while SCL is HIGH, resets the Watchdog Timer. RESET
goes active on power up and remains active for typically 200ms after the power supply
stabilizes.
Ground
Serial Data. SDA is a bidirectional pin used to transfer data into and out of the device. It has
an open drain output and may be wire ORed with other open drain or open collector outputs.
This pin requires a pull up resistor and the input buffer is always active (not gated).
Watchdog Input. A HIGH to LOW transition on the SDA (while SCL is HIGH) restarts the
Watchdog timer. The absence of a HIGH to LOW transition within the watchdog time-out
period results in RESET going active.
Serial Clock. The Serial Clock controls the serial bus timing for data input and output.
V2 Voltage Fail Output. This open drain output goes LOW when V2MON is less than
V
circuitry on this pin. This circuit works independently from the Low V
switch circuits. Connect V2FAIL to VSS when not used.
V2 Voltage Monitor Input. When the V2MON input is less than the V
goes LOW. This input can monitor an unregulated power supply with an external resistor
divider or can monitor a second power supply with no external components. Connect
V2MON to V
circuits.
Write Protect. WP HIGH used in conjunction with WPEN bit prevents writes to the control
register.
Supply Voltage
TRIP2
and goes HIGH when V2MON exceeds V
CC
sense level for typically 200ms. RESET goes active if the Watchdog Timer is
™
SS
Protection. The
or V
CC
when not used. There is no hysteresis in the V2MON comparator
www.xicor.com
™
CC
cell,
sense level. It will remain active until V
PIN CONFIGURATION
Function
RESET
V
NC
TRIP2
NC
NC
SS
S
S
0
1
Characteristics subject to change without notice.
14 Pin SOIC/TSSOP
. There is no power up reset delay
1
2
3
4
5
6
7
CC
CC
TRIP2
14
13
12
11
10
9
8
rises above the min-
reset and battery
V
NC
WP
V2MON
V2FAIL
SCL
SDA
voltage, V2FAIL
CC
2 of 23
CC