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参数资料
| 型号： | DS2784G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 40/43页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE STND-ALONE 14-TDFN |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 2.5 V ~ 4.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 管件 |
| 产品目录页面： | 1437 (CN2011-ZH PDF) |
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DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
I/O SIGNALING
The 1-Wire bus requires strict signaling protocols to ensure data integrity. The four protocols used by the DS2784
are as follows: the initialization sequence (reset pulse followed by presence pulse), write 0, write 1, and read data.
The bus master initiates all these types of signaling except the presence pulse.
The initialization sequence required to begin any communication with the DS2784 is shown in Figure 14. A
presence pulse following a reset pulse indicates that the DS2784 is ready to accept a net address command. The
bus master transmits (Tx) a reset pulse for t RSTL . The bus master then releases the line and goes into Receive
mode (Rx). The 1-Wire bus line is then pulled high by the pullup resistor. After detecting the rising edge on the DQ
pin, the DS2784 waits for t PDH and then transmits the presence pulse for t PDL .
Figure 14. 1-Wire Initialization Sequence
t RSTL
t PDH
t PDL
t RSTH
PACK+
DQ
PACK-
LINE TYPE LEGEND:
BUS MASTER ACTIVE LOW
BOTH BUS MASTER AND
DS2784 ACTIVE LOW
RESISTOR PULLUP
DS2784 ACTIVE LOW
WRITE-TIME SLOTS
A write-time slot is initiated when the bus master pulls the 1-Wire bus from a logic-high (inactive) level to a logic-low
level. There are two types of write-time slots: write 1 and write 0. All write-time slots must be t SLOT in duration with a
1 μ s minimum recovery time, t REC , between cycles. The DS2784 samples the 1-Wire bus line between t LOW1_MAX and
t LOW0_MIN after the line falls. If the line is high when sampled, a write 1 occurs. If the line is low when sampled, a
write 0 occurs. The sample window is illustrated in Figure 15. For the bus master to generate a write-1 time slot, the
bus line must be pulled low and then released, allowing the line to be pulled high less than t RDV after the start of the
write time slot. For the host to generate a write 0 time slot, the bus line must be pulled low and held low for the
duration of the write-time slot.
READ-TIME SLOTS
A read-time slot is initiated when the bus master pulls the 1-Wire bus line from a logic-high level to a logic-low level.
The bus master must keep the bus line low for at least 1 μ s and then release it to allow the DS2784 to present valid
data. The bus master can then sample the data t RDV from the start of the read-time slot. By the end of the read-time
slot, the DS2784 releases the bus line and allows it to be pulled high by the external pullup resistor. All read-time
slots must be t SLOT in duration with a 1 μ s minimum recovery time, t REC , between cycles. See Figure 15 and the
timing specifications in the Electrical Characteristics table for more information.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2784G R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication |
| DS2784G T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication |
| DS2784G+ | 功能描述:电池管理 Stand-Alone Fuel Gauge RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2784G+R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li Protector and SHA-1 Authentication |
| DS2784G+T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li Protector and SHA-1 Authentication |
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