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X4285V8I-2.7 Datasheet(PDF) 2 Page - Intersil Corporation

Part # X4285V8I-2.7
Description  CPU Supervisor with 128K EEPROM
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X4285V8I-2.7 Datasheet(HTML) 2 Page - Intersil Corporation

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2
FN8121.0
March 29, 2005
The memory portion of the device is a CMOS Serial
EEPROM array with Intersil’s Block Lock protection.
The array is internally organized as 64 bytes per page.
The device features an 2-wire interface and software
protocol allowing operation on an 2-wire bus.
PIN CONFIGURATION
PIN DESCRIPTION
S1
VSS
VCC
SDA
SCL
3
2
4
1
6
7
5
8
S0
WP
RST/RST
VCC
S1
SCL
RST/RST
VSS
3
2
4
1
6
7
5
8
WP
SDA
S0
8-Pin JEDEC SOIC
8-Pin TSSOP
Pin
(SOIC)
Pin
(TSSOP)
Name
Function
13
S0
Device Select Input
24
S1
Device Select Input
35
RESET/
RESET
Reset Output. RESET/RESET is an active LOW/HIGH, open drain output which
goes active whenever VCC falls below the minimum VCC sense level. It will remain ac-
tive until VCC rises above the minimum VCC sense level for 250ms. RESET/RESET
goes active if the Watchdog Timer is 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/RESET goes active on power-up
and remains active for 250ms after the power supply stabilizes.
46
VSS
Ground
57
SDA
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 al-
ways 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/RESET going active.
68
SCL
Serial Clock. The Serial Clock controls the serial bus timing for data input and output.
71
WP
Write Protect. WP HIGH used in conjunction with WPEN bit prevents writes to the
control register.
82
VCC
Supply Voltage
X4283, X4285


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