X40626S14-4.5A Datasheet PDF - Xicor
| Part Number | X40626S14-4.5A | |
| Description | Dual Voltage CPU Supervisor with 64K Serial EEPROM | |
| Manufacturers | Xicor | |
| Logo |  |
|
|
There is a preview and X40626S14-4.5A download ( pdf file ) link at the bottom of this page. Total 23 Pages | ||
Preview 1 page No Preview Available !
Preliminary Information
64K
X40626
8K x 8 Bit
Dual Voltage CPU Supervisor with 64K Serial EEPROM
FEATURES
• Dual voltage monitoring
—V2Mon operates independent of VCC
• Watchdog timer with selectable timeout intervals
• Low VCC detection and reset assertion
—Four standard reset threshold voltages
—User programmable VTRIP threshold
—Reset signal valid to VCC=1V
• Low power CMOS
—20µA max standby current, watchdog on
—1µA standby current, watchdog OFF
• 64Kbits of EEPROM
—64 byte page size
• Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2, all or 64, 128, 256 or 512
bytes of EEPROM array with programmable
Block Lock™ protection
• 400kHz 2-wire interface
—Slave addressing supports up to 4 devices on
the same bus
• 2.7V to 5.5V power supply operation
• Available Packages
—14-lead SOIC
—14-lead TSSOP
DESCRIPTION
The X40626 combines four popular functions, Power-on
Reset Control, Watchdog Timer, Dual Supply Voltage
Supervision, and Serial EEPROM Memory in one pack-
age. 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 stabi-
lize before the processor can execute code.
The Watchdog Timer provides an independent protection
mechanism for microcontrollers. When the microcontrol-
ler 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 set minimum VCC trip
point. RESET is asserted until VCC returns to proper
BLOCK DIAGRAM
V2MON
WP
SDA
SCL
S0
S1
V2 Monitor
Logic
+
VTRIP2
-
Watchdog Transition
Detector
Data
Register
Command
Decode &
Control
Logic
VCC Threshold
Reset logic
Protect Logic
Status
Register
64KB
EEPROM
Array
Watchdog
Timer Reset
Reset &
Watchdog
Timebase
V2FAIL
RESET
Power on and
Low Voltage
VCC
+ Reset
VTRIP
-
Generation
REV 1.1.15 2/11/04
www.xicor.com
Characteristics subject to change without notice. 1 of 23
|
| |
 
X40626
Figure 4. VTRIP Programming Sequence
VTRIPX Programming
No Desired
VTRIPX
Present Value
YES
Set VX = Desired VTRIPX
New VX applied =
Old VX applied + | Error |
NO
Execute
Set Higher VTRIPX Sequence
Execute
Set Higher VX Sequence
Apply VCC and Voltage
> Desired VTRIPX to VX
Decrease VX
Vx = VCC, V2MON
Let: MDE = Maximum Desired Error
MDE+
Desired Value
MDE–
Acceptable
Error Range
Error = Actual - Desired
New VX applied =
Old VX applied - | Error |
Execute Reset VTRIPX
Sequence
Error < MDE–
Output Switches?
YES
Actual VTRIPX -
Desired VTRIPX
Error > MDE+
| Error | < | MDE |
DONE
REV 1.1.15 2/11/04
www.xicor.com
Characteristics subject to change without notice. 5 of 23
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for X40626S14-4.5A electronic component. |
| Information | Total 23 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ X40626S14-4.5A.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| X40626S14-4.5A | The function is Dual Voltage CPU Supervisor with 64K Serial EEPROM. Xicor | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
X406
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||