PT7C43390 Datasheet, PDF (2/38 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C43390/43390C
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Real-time Clock Module
Pin Configuration
PT7C43390
1 _INT1
2 _XOUT
3 XIN
4 GND
VDD 8
SDA 7
SCL 6
INT2 5
SOIC-8L
PT7C43390
1 INT1
2 XOUT
3 XIN
4 GND
VDD 8
SDA 7
SCL 6
INT2 5
TSSOP-8L
PT7C43390
INT1 1
XOUT 2
XIN 3
GND 4
8 VDD
7 SDA
6 SCL
5 _INT2
TDFN2x3-8L
PT7C43390C
INT1 1
NC1 2
PP
12
8 VDD
7 SDA
NC2 3
GND 4
GND
6 SCL
5 INT2
TDFN4x4-8L
Pin Description
Pin No.
Pin
43390 43390C Name
1
1
INT1
2
-
XOUT
-
2
NC1
3
-
XIN
-
3
NC2
4
4
VSS
5
5
INT2
6
6
SCL
7
7
SDA
8
8
VDD
Type
O
O
-
I
-
P
O
I
I/O
P
Description
Output for Interrupt Signal 1. This pin outputs a signal of interrupt, or a clock pulse. By
using the status register 2, users can select either of: alarm 1 interrupt, output of user-set
frequency, per-minute edge interrupt, minute-periodical interrupt 1, minute-periodical
interrupt 2, or 32.768 kHz output. This pin has NCH open drain output.
Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between
them. When 32.768kHz external input, X2 must be float.
No connected.
Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected between
them. Or external clock input.
No connected.
Negative power supply pin. Connects to GND.
Output for Interrupt Signal 2. This pin outputs a signal of interrupt, or a clock pulse. By
using the status register 2, users can select either of: alarm2 interrupt, output of user-set
frequency, or minute-periodical interrupt 1. This pin has NCH open drain output.
Serial clock input pin. This pin is to input a clock pulse for I²C-bus interface. The SDA
pin inputs/outputs data by synchronizing with the clock pulse.
Serial Data Input/Output. This is a data input / output pin of I²C-bus interface. This pin
inputs / outputs data by synchronizing with a clock pulse from the SCL pin. This pin has
CMOS input and NCH open drain output. Generally in use, pull up this pin to the V_DD
potential via a resistor, and connect it to any other device having open drain or open
collector output with wired-OR connection.
Positive power supply pin. Connect this VDD pin with a positive power supply.
2015-12-0001
PT0280-8 12/11/15
2