CAT1161WI-42-GT3 CATALYST SEMICONDUCTOR, CAT1161WI-42-GT3 Datasheet - Page 6

• Manufacturer Part Number: CAT1161WI-42-GT3
• Description: CPU SUP WITH 16K EEPROM
• Manufacturer: CATALYST SEMICONDUCTOR

Specifications of CAT1161WI-42-GT3

• No. Of Supervisors / Monitors: 1
• Supply Voltage Range: 2.7V To 6V
• Reset Type: Manual, Active-High / Active-Low
• Supply Current: 3mA
• Digital Ic Case Style: SOIC
• No. Of Pins: 8
• Threshold Voltage: 4.5V

CAT1161, CAT1162
Hardware Data Protection
The CAT1161/2 is designed with the following
hardware data protection features to provide a high
degree of data integrity.
(1) The CAT1161/2 features a WP pin. When the WP
(2) The V
Figure 2. Bus Timing
Figure 3. Write Cycle Timing
Figure 4. Start/Stop Timing
Doc. No. MD-3002 Rev. I
pin is tied high the entire memory array becomes
write protected (read only).
falls below the reset threshold value (V
CC
SCL
SDA
sense provides write protection when V
SDA OUT
SDA IN
SCL
SDA
SCL
t SU:STA
8TH BIT
BYTE n
START BIT
t F
t HD:STA
t LOW
ACK
t AA
TH
t HD:DAT
). The
t HIGH
CC
STOP
CONDITION
6
t LOW
Reset Threshold Voltage
The CAT1161/2 is offered with five reset threshold
voltage ranges. They are 4.50 ÷ 4.75V, 4.25 ÷ 4.50V,
3.00 ÷ 3.15V, 2.85 ÷ 3.00V and 2.55 ÷ 2.70V.
t DH
V
whenever V
until V
V
is not recognized and an ACK will not be sent on
the SDA line when RESET or RESET
t SU:DAT
t R
CC
TH
. Any attempt to access the internal EEPROM
t WR
lock out inhibits writes to the serial EEPROM
CC
reaches the reset threshold (power up)
CC
STOP BIT
START
CONDITION
falls below (power down) V
t SU:STO
t BUF
Characteristics subject to change without notice
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ADDRESS
TH
or