參數(shù)資料
型號(hào)： DS1344E-3+T&R
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 20/20頁(yè)
文件大?。?/td> 0K
描述： IC RTC SPI 3.0V 20TSSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
類型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，閏年，NVRAM，方波輸出，涓流充電器
存儲(chǔ)容量： 96B
時(shí)間格式： HH:MM:SS（12/24 小時(shí)）
數(shù)據(jù)格式： YY-MM-DD-dd
接口： SPI
電源電壓： 2.7 V ~ 5.5 V
電壓 - 電源，電池： 1.3 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 20-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 20-TSSOP
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： DS1344E-3+T&RDKR
9
Maxim Integrated
Low-Current SPI/3-Wire RTCs
DS1343/DS1344
Pin Descriptions (continued)
Functional Diagram
DS1343
DS1344
N
CLOCK, CALENDAR, AND
ALARM REGISTERS
OSCILLATOR AND
COUNTDOWN CHAIN
INT0
INPUT
SHIFT
REGISTER
CONTROL
REGISTERS
USER RAM
SERIAL
INTERFACE
N
INT1
SERMODE
SDO
SDI
SCLK
CE
POWER CONTROL
AND
TRICKLE CHARGER
GND
ON_VCC
1Hz
X2
32.768kHz
X1
VBAT
PF
VCC
PIN
NAME
FUNCTION
TSSOP
TDFN-EP
10
7
GND
Ground
11
13
SERMODE
Serial-Interface Mode Input. When connected to GND, standard 3-wire
communication is selected. When connected to VCC, SPI communication is selected.
12
8
CE
Chip Enable. The chip-enable signal must be asserted high during a read or a write
for either 3-wire or SPI communications.
14
9
SCLK
Serial-Clock Input. SCLK is used to synchronize data movement on the serial
interface for either 3-wire or SPI communications.
15
10
SDI
Serial-Data Input. When SPI communication is selected, SDI is the serial-data input
for the SPI bus. When 3-wire communication is selected, this pin must be connected
to SDO (SDI and SDO function as a single I/O pin when connected together).
16
11
SDO
Serial-Data Output. When SPI communication is selected, SDO is the serial-data
output for the SPI bus. When 3-wire communication is selected, this pin must be
connected to SDI (SDI and SDO function as a single I/O pin when connected
together).
18
12
PF
Active-Low Power-Fail Output. The PF pin is used to indicate loss of the primary
power supply (VCC). When VCC is less than VPF, the PF pin is driven low.
20
14
VCC
Power-Supply Input
—
EP
Exposed Pad (TDFN Only). Connect to GND or leave unconnected.
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