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参数资料
| 型号： | DS2482S-100+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC BRIDGE I2C TO 1-WIRE 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 控制器类型： | I²C 总线控制器 |
| 接口： | I²C |
| 电源电压： | 3.3V，5V |
| 电流 - 电源： | 750µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1429 (CN2011-ZH PDF) |
Single-Channel 1-Wire Master
VCC
0V
1-Wire BUS IS DISCHARGED
VIL1(MAX)
VIH1(MIN)
t1
t2
tAPUOT
t3
APU = 1
APU = 0
Figure 2. Rising Edge Pullup
Configuration Register Bit Assignment
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
1WS
SPU
1
APU
1WS
SPU
0
APU
Device Registers
The DS2482-100 has three registers that the I2C host
can read: Configuration, Status, and Read Data. These
registers are addressed by a read pointer. The position
of the read pointer, i.e., the register that the host reads
in a subsequent read access, is defined by the instruc-
tion the DS2482-100 executed last. To enable certain
1-Wire features, the host has read and write access to
the Configuration Register.
Configuration Register
The DS2482-100 supports three 1-Wire features that
are enabled or selected through the Configuration
Register. These features are:
Active Pullup (APU)
Strong Pullup (SPU)
1-Wire Speed (1WS)
These features can be selected in any combination.
While APU and 1WS maintain their state, SPU returns to
its inactive state as soon as the strong pullup has ended.
After a device reset (power-up cycle or initiated by the
Device Reset command), the Configuration Register
reads 00h. When writing to the Configuration Register,
the new data is accepted only if the upper nibble (bits 7
to 4) is the one’s complement of the lower nibble (bits 3
to 0). When read, the upper nibble is always 0h.
Active Pullup (APU)
The APU bit controls whether an active pullup (con-
trolled slew-rate transistor) or a passive pullup (RWPU
resistor) is used to drive a 1-Wire line from low to high.
When APU = 0, active pullup is disabled (resistor
mode). Active pullup should always be selected unless
there is only a single slave on the 1-Wire line. The
active pullup does not apply to the rising edge of a
presence pulse or a recovery after a short on the
1-Wire line.
The circuit that controls rising edges (Figure 2) oper-
ates as follows: At t1, the pulldown (from DS2482-100
or 1-Wire slave) ends. From this point on, the 1-Wire
bus is pulled high through RWPU internal to the
DS2482-100. VCC and the capacitive load of the 1-Wire
line determine the slope. In case that active pullup is
disabled (APU = 0), the resistive pullup continues, as
represented by the solid line. With active pullup
enabled (APU = 1), and when at t2 the voltage has
reached a level between VIL1(MAX) and VIH1(MIN), the
DS2482-100 actively pulls the 1-Wire line high, applying
a controlled slew rate as represented by the dashed
line. The active pullup continues until tAPUOT is expired
at t3. From that time on the resistive pullup continues.
See the
Strong Pullup (SPU) section for a way to keep
the pullup transistor conducting beyond t3.
DS2482-100
6
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2482S-100/R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Single-Channel 1-Wire Master |
| DS2482S-100/T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Single-Channel 1-Wire Master |
| DS2482S-100/T&R | 功能描述:接口 - 专用 RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS2482S-100+ | 功能描述:接口 - 专用 1-Wire Master RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS2482S-100+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:SGL CH 1 WIRE MASTER 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:SINGLE-CHANNEL 1-W LN DR 8SO/T&R LF 制造商:Maxim Integrated Products 功能描述:IC I2C TO 1WIRE BRIDGE 8SOIC 制造商:Maxim Integrated Products 功能描述:I2C to 1 Wire Bridge Device SOIC8 T/R |
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