DS1346 Datasheet, PDF (5/17 Pages) Maxim Integrated Products – Low-Current, SPI-Compatible Real-Time Clocks

Low-Current, SPI-Compatible Real-Time Clocks
Pin Configuration
TOP VIEW
+
SCLK 1
DOUT 2
DIN 3
DS1346
DS1347
GND 4
EP
8 X1
7 X2
6 V_CC
5 CS
TDFN
Pin Description
PIN
NAME
FUNCTION
1
SCLK
Serial-Clock Input. SCLK is used to synchronize data movement on the serial interface for either 3-wire or
SPI communications.
2
DOUT
Serial-Data Output. When SPI communication is enabled, the DOUT pin is the serial-data output for the SPI
bus.
3
DIN Serial-Data Input. When SPI communication is enabled, the DIN pin is the serial-data input for the SPI bus.
4
GND Ground
5
CS
Active-Low Chip Select. The chip-enable signal must be asserted low during a read or a write for SPI
communications.
6
V_CC Power-Supply Input
7
X1 ^{Connections for Standard 32.768kHz Quartz Crystal (see the Crystal Characteristics table). The devices}
can also be driven by an external 32.768kHz oscillator. In this configuration, the X1 pin is connected to
8
X2 the external oscillator and the X2 pin is left unconnected.
—
EP Exposed Pad. Connect to GND or leave unconnected.
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