X1227V8T1
| Model | X1227V8T1 |
| Description | REAL TIME CLOCK, PDSO8, PLASTIC, TSSOP-8 |
| PDF file | Total 28 pages (File size: 422K) |
| Chip Manufacturer | RENESAS |
X1227
PIN DESCRIPTIONS
X1227
8-Pin SOIC
X1
X2
RESET
V
SS
1
2
3
4
8
7
6
5
V
CC
V
BACK
SCL
SDA
V
BACK
V
CC
X1
X2
X1227
8-Pin TSSOP
1
2
3
4
8
7
6
5
SCL
SDA
V
SS
RESET
NC = No internal connection
PIN ASSIGNMENTS
Pin Number
SOIC
1
2
3
TSSOP
3
4
5
Symbol
X1
X2
RESET
Brief Description
X1.
The X1 pin is the input of an inverting amplifier and should be connected to one
pin of a 32.768kHz quartz crystal.
X2.
The X2 pin is the output of an inverting amplifier and should be connected to
one pin of a 32.768kHz quartz crystal..
Reset Output – RESET.
This is a reset signal output. This signal notifies a host
processor that the watchdog time period has expired or that the voltage has
dropped below a fixed V
TRIP
threshold. It is an open drain active LOW output.
V
SS
.
Serial Data (SDA).
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.
Serial Clock (SCL).
The SCL input is used to clock all data into and out of the
device. The input buffer on this pin is always active (not gated).
V
BACK
.
This input provides a backup supply voltage to the device. V
BACK
supplies
power to the device in the event the V
CC
supply fails. This pin can be connected to
a battery, a Supercap or tied to ground if not used.
V
CC
.
4
5
6
7
V
SS
SDA
6
7
8
1
SCL
V
BACK
8
2
V
CC
3
FN8099.1
September 15, 2005
