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參數(shù)資料
| 型號： | DS2404 |
| 英文描述： | EconoRAM Time Chip |
| 中文描述： | 經(jīng)濟型RAM時鐘芯片 |
| 文件頁數(shù)： | 23/28頁 |
| 文件大?。?/td> | 663K |
| 代理商： | DS2404 |
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DS2404
23 of 28
020998
Battery Operate Mode
Figure 17 shows the necessary connections for operating the DS2404 in Battery Operate mode.
BATTERY OPERATE MODE
Figure 17
V
CC
V
BATB
V
BATO
Pin 1 & 16
Pin 9
Pin 10
Ground
Ground
2.8 to 5.5 volts
The V
BATO
pin is normally connected to any standard 3 V lithium cell or other energy source. The Battery
Operate mode also minimizes the power-consumption in applications where battery backup is not
required and the V
BATO
lead is directly connected to the system’s 5V supply.
Note:
In Battery Operate mode, the voltage on DQ must never exceed the voltage on V
BATO
if the 3-wire
interface is used. This restriction does not apply to the 1-Wire interface.
DEVICE OPERATION MODES
With its two ports and two power modes the DS2404 can be operated in several ways. While the
maximum voltage on the 1-Wire port (I/O) is always 6V, the maximum voltage on the 3-wire port (DQ)
depends on the power mode and actual operating voltage. A particular port is selected by setting the
control lines to a state that makes the other port inactive. See Table 1 for details.
When using the 3-wire port only and the DS2404 is wired for V
CC
Operate Mode (Battery Backed) the 1-
Wire I/O pin can be used as counter input. This mode requires that the I/O lead is connected to V
CC
through a 5k
(typical) resistor. To enable communication through the 3-wire port a reset/presence
sequence has to be performed on the 1-Wire port after the system has powered up.
OPERATION MODES AND CONDITIONS
(Table 1)
PORT USAGE
BATTERY OPERATE MODE
1-Wire only
DQ Voltage (3-wire)
≤
V
BATO
3-Wire only
If unused: float I/O (1-Wire) or tie to GND; if used as counter input:
see text
DQ Voltage (3-wire)
≤
V
BATO
1-Wire and 3-wire
Dual Port Operation
1-Wire Port:
finish each communication with a reset/presence sequence: when
idle: either keep I/O pulled high through a resistor or pull it low;
3-wire Port:
when idle: keep
RST
and CLK low, keep DQ high or low or
floating
V
CC
OPERATE MODE (BATTERY BACKED)
Float
RST
, DQ, CLK or tie to GND
DQ Voltage (3-wire)
≤
V
CC
+0.3V
DQ Voltage (3-wire)
≤
V
CC
+0.3V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2404-001 | EconoRAM Time Chip |
| DS2404B | EconoRAM Time Chip |
| DS2404S | EconoRAM Time Chip |
| DS2405 | Addressable Switch |
| DS2405P | Addressable Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2404-001 | 制造商:Maxim Integrated Products 功能描述:ECONORAM/TIME, DIP16 (GENERIC) - Rail/Tube |
| DS2404-001+ | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 512BYTE 16PDIP - Rail/Tube |
| DS2404B | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS2404B/T&R | 制造商:Maxim Integrated Products 功能描述:ECONORAM/TIME, SSOP16-TRL (GENERIC) - Tape and Reel |
| DS2404B+ | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 512BYTE 16SSOP - Rail/Tube |
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