参数资料
型号: DS1305N+
厂商: Maxim Integrated Products
文件页数: 17/22页
文件大小: 0K
描述: IC RTC SERIAL ALARM 16-DIP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 25
类型: 时钟/日历
特点: 警报器,闰年,NVSRAM,涓流充电器
存储容量: 96B
时间格式: HH:MM:SS(12/24 小时)
数据格式: YY-MM-DD-dd
接口: SPI
电源电压: 2 V ~ 5.5 V
电压 - 电源,电池: 2 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 16-DIP(0.300",7.62mm)
供应商设备封装: 16-PDIP
包装: 管件
产品目录页面: 1433 (CN2011-ZH PDF)
DS1305
4 of 22
PIN DESCRIPTION (continued)
PIN
DIP
TSSOP
NAME
FUNCTION
12
15
SDI
Serial Data Input. When SPI communication is selected, the SDI pin is the
serial data input for the SPI bus. When 3-wire communication is selected, this
pin must be tied to the SDO pin (the SDI and SDO pins function as a single I/O
pin when tied together).
13
16
SDO
Serial Data Output. When SPI communication is selected, the SDO pin is the
serial data output for the SPI bus. When 3-wire communication is selected, this
pin must be tied to the SDI pin (the SDI and SDO pins function as a single I/O
pin when tied together).
14
17
VCCIF
Interface Logic Power-Supply Input. The VCCIF pin allows the DS1305 to drive
SDO and
PF output pins to a level that is compatible with the interface logic,
thus allowing an easy interface to 3V logic in mixed supply systems. This pin is
physically connected to the source connection of the p-channel transistors in
the output buffers of the SDO and
PF pins.
15
18
PF
Active-Low Power-Fail Output. The
PF pin is used to indicate loss of the
primary power supply (VCC1). When VCC1 is less than VCC2 or is less than VBAT,
the
PF pin is driven low.
16
20
VCC1
Primary Power Supply. DC power is provided to the device on this pin.
OPERATION
The block diagram in Figure 1 shows the main elements of the serial alarm RTC. The following
paragraphs describe the function of each pin.
Figure 1. BLOCK DIAGRAM
1Hz
OSCILLATOR AND
COUNTDOWN CHAIN
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