X25165 Data Sheet PDF | Xicor





(Datasheet) X25165 PDF Download

Part Number X25165
Description Programmable Watchdog Timer & V CC Supervisory Circuit w/Serial E 2 PROM
Manufacture Xicor
Total Page 16 Pages
PDF Download Download X25165 Datasheet PDF

Features: 64K 32K 16K FEATURES X25643/45 X25323/2 5 X25163/65 DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit Programmable Watchd og Timer & VCC Supervisory Circuit w/Se rial E2PROM • Programmable Watchdog T imer • Low Vcc Detection and Reset As sertion —Reset Signal Valid to Vcc=1V • Save Critical Data With Block Lock TM Protection —Block LockTM Protect 0 , 1/4, 1/2 or all of Serial E2PROM Memo ry Array • In Circuit Programmable RO M Mode • Long Battery Life With Low P ower Consumption —<50µA Max Standby Current, Watchdog On —<1µA Max Stand by Current, Watchdog Off —<5mA Max Ac tive Current during Write —<400µA Ma x Active Current during Read • 1.8V t o 3.6V, 2.7V to 5.5V and 4.5V to 5.5V P ower Supply Operation • 2MHz Clock Ra te • Minimize Programming Time —32 Byte Page Write Mode —Self-Timed Writ e Cycle —5ms Write Cycle Time (Typica l) • SPI Modes (0,0 & 1,1) • Built- in Inadvertent Write Protection —Powe r-Up/Power-Down Protection Circuitry —Write Enable Latch —Write Protect Pin • High Reliability • Available.

Keywords: X25165, datasheet, pdf, Xicor, Programmable, Watchdog, Timer, &, V, CC, Supervisory, Circuit, w/Serial, E, 2, PROM, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent

X25165 datasheet
64K
X25643/45
8K x 8 Bit
32K
X25323/25
4K x 8 Bit
16K
X25163/65
2K x 8 Bit
Programmable Watchdog Timer & VCC Supervisory Circuit w/Serial E2PROM
FEATURES
DESCRIPTION
• Programmable Watchdog Timer
• Low Vcc Detection and Reset Assertion
—Reset Signal Valid to Vcc=1V
• Save Critical Data With Block LockTM Protection
—Block LockTM Protect 0, 1/4, 1/2 or all of
Serial E2PROM Memory Array
• In Circuit Programmable ROM Mode
• Long Battery Life With Low Power Consumption
—<50µA Max Standby Current, Watchdog On
—<1µA Max Standby Current, Watchdog Off
—<5mA Max Active Current during Write
—<400µA Max Active Current during Read
• 1.8V to 3.6V, 2.7V to 5.5V and 4.5V to 5.5V Power
Supply Operation
• 2MHz Clock Rate
• Minimize Programming Time
—32 Byte Page Write Mode
—Self-Timed Write Cycle
—5ms Write Cycle Time (Typical)
• SPI Modes (0,0 & 1,1)
• Built-in Inadvertent Write Protection
—Power-Up/Power-Down Protection Circuitry
—Write Enable Latch
—Write Protect Pin
• High Reliability
• Available Packages
—14-Lead SOIC (X2564x)
—14-Lead TSSOP (X2532x, X2516x)
—8-Lead SOIC (X2532x, X2516x)
These devices combine three popular functions, Watch-
dog Timer, Supply Voltage Supervision, and Serial
E2PROM Memory in one package. This combination low-
ers system cost, reduces board space requirements, and
increases reliability.
The Watchdog Timer provides an independent protection
mechanism for microcontrollers. During a system failure,
the device will respond with a RESET/RESET signal
after a selectable time-out interval. The user selects the
interval from three preset values. Once selected, the
interval does not change, even after cycling the power.
The user’s system is protected from low voltage condi-
tions by the device’s low Vcc detection circuitry. When
Vcc falls below the minimum Vcc trip point, the system is
reset. RESET/RESET is asserted until Vcc returns to
proper operating levels and stabilizes.
The memory portion of the device is a CMOS Serial
E2PROM array with Xicor’s Block LockTM Protection. The
array is internally organized as x 8. The device features a
Serial Peripheral Interface (SPI) and software protocol
allowing operation on a simple four-wire bus.
The device utilizes Xicor’s proprietary Direct WriteTM cell,
providing a minimum endurance of 100,000 cycles per
sector and a minimum data retention of 100 years.
BLOCK DIAGRAM
SI
SO
SCK
CS
RESET/RESET
DATA
REGISTER
COMMAND
DECODE &
CONTROL
LOGIC
RESET
CONTROL
X - DECODE
LOGIC
STATUS
REGISTER
PAGE DECODE LOGIC
32 8
SERIAL
E2PROM
ARRAY
VCC
LOW
VOLTAGE
SENSE
WATCHDOG
TIMER
WP
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
7049 -1.0 6/20/97 T0/C0/D0 SH
PROGRAMMING,
BLOCK LOCK &
ICP ROM CONTROL
1
HIGH
VOLTAGE
CONTROL
7036 FRM 01
Characteristics subject to change without notice

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