CAT1641WI-25-T3 ON Semiconductor, CAT1641WI-25-T3 Datasheet - Page 11

• Manufacturer Part Number: CAT1641WI-25-T3
• Description: Supervisory Circuits CPU w/64K
• Manufacturer: ON Semiconductor

Specifications of CAT1641WI-25-T3

• Product Category: Supervisory Circuits
• Rohs: yes
• Number Of Voltages Monitored: 1
• Monitored Voltage: 3 V, 3.3 V, 5 V
• Undervoltage Threshold: 2.55 V
• Overvoltage Threshold: 2.7 V
• Output Type: Active High, Open Drain
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 270 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8 Wide
• Chip Enable Signals: No
• Maximum Power Dissipation: 1000 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Supply Current (typ): 3000 uA
• Supply Voltage - Min: 3 V

Acknowledge Polling
the typical write cycle time. Once the stop condition is issued
to indicate the end of the host’s write operation, the
CAT1640/41 initiates the internal write cycle. ACK polling
can be initiated immediately. This involves issuing the start
condition followed by the slave address for a write
operation. If the device is still busy with the write operation,
no ACK will be returned. If a write operation has completed,
an ACK will be returned and the host can then proceed with
the next read or write operation.
BUS
ACTIVITY:
SDA LINE
MASTER
* = Don’t Care Bit
Disabling of the inputs can be used to take advantage of
S
R
S
T
A
T
SDA
SCL
* = Don’t Care Bit
BUS ACTIVITY:
ADDRESS
SLAVE
SDA LINE
MASTER
A
C
K
***
S
S
A
R
BUS ACTIVITY:
T
T
A 15 –A 8
ADDRESS
SDA LINE
MASTER
SLAVE
Figure 10. Immediate Address Read Timing
BYTE ADDRESS
DATA OUT
8TH BIT
A
C
K
8
Figure 9. Page Write Timing
Figure 8. Byte Write Timing
S
S
A
R
C
T
T
A
K
***
A 7 –A 0
http://onsemi.com
ADDRESS
A 15 –A 8
SLAVE
BYTE ADDRESS
11
C
A
K
Read Operations
the same manner as the write operation with one exception,
that R/W bit is set to one. Three different READ operations
are
Selective/Random READ and Sequential READ.
The READ operation for the CAT1640/41 is initiated in
A
C
K
A
C
K
DATA
NO ACK
possible:
9
A 7 –A 0
DATA
A
C
K
Immediate/Current
DATA n
C
A
K
O
N
A
C
K
P
O
S
T
P
DATA
A
C
K
STOP
C
A
K
C
A
K
Address
P
O
DATA n+63
S
P
T
READ,
A
C
K
S
O
P
T
P