- 您现在的位置：买卖IC网 > PDF目录1915 > DS2482X-100+T (Maxim Integrated Products)IC MASTER I2C-1WIRE 1CH 9-WLP PDF资料下载
参数资料
| 型号： | DS2482X-100+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | IC MASTER I2C-1WIRE 1CH 9-WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 控制器类型： | I²C 总线控制器 |
| 接口： | I²C |
| 电源电压： | 2.9 V ~ 5.5 V |
| 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： | 9-WFBGA，WLBGA |
| 供应商设备封装： | 9-WLP |
| 包装： | 带卷 (TR) |
Strong Pullup (SPU)
The SPU bit is used to activate the strong pullup func-
tion prior to a 1-Wire Write Byte or 1-Wire Single Bit
command. Strong pullup is commonly used with 1-Wire
EEPROM devices when copying scratchpad data to the
main memory or when performing an SHA-1 computa-
tion and with parasitically powered temperature sen-
sors or A/D converters. The respective device data
sheets specify the location in the communications pro-
tocol after which the strong pullup should be applied.
The SPU bit must be set immediately prior to issuing
the command that puts the 1-Wire device into the state
where it needs the extra power. The strong pullup uses
the same internal pullup transistor as the active pullup
feature. For cases where the internal strong pullup has
insufficient strength, the PCTLZ pin can be used to con-
trol an external p-channel MOSFET to supply additional
power beyond the drive capability of the DS2482-100 to
the 1-Wire line. See the
ΔVSTRPU parameter in the
Electrical Characteristics to determine if the internal
strong pullup is sufficient given the current load on the
device.
If SPU is 1, the DS2482-100 treats the rising edge of the
time slot in which the strong pullup starts as if the active
pullup was activated. However, in contrast to the active
pullup, the strong pullup, i.e., the internal pullup transistor,
remains conducting, as shown in Figure 3, until one of
three events occurs: the DS2482-100 receives a command
that generates 1-Wire communication (the typical case);
the SPU bit in the Configuration Register is written to 0; or
the DS2482-100 receives the Device Reset command. As
long as the strong pullup is active, the PCTLZ output is low.
When the strong pullup ends, the SPU bit is automati-
cally reset to 0. Using the strong pullup feature does
not change the state of the APU bit in the Configuration
Register. Note: Strong pullup also affects the 1-Wire
Reset command. If enabled, it can cause incorrect
reading of the presence pulse and may cause a viola-
tion of the device’s absolute maximum rating.
1-Wire Speed (1WS)
The 1WS bit determines the timing of any 1-Wire com-
munication generated by the DS2482-100. All 1-Wire
slave devices support standard speed (1WS = 0),
where the transfer of a single bit (tSLOT in Figure 3) is
completed within 65s. Many 1-Wire devices can also
communicate at a higher data rate, called overdrive
speed. To change from standard to overdrive speed, a
1-Wire device needs to receive an Overdrive-Skip ROM
or Overdrive-Match ROM command, as explained in
the 1-Wire device data sheets. The change in speed
occurs immediately after the 1-Wire device has
received the speed-changing command code. The
DS2482-100 must take part in this speed change to
stay synchronized. This is accomplished by writing to
the Configuration Register with the 1WS bit as 1
imme-
diately after the 1-Wire Byte command that changes the
speed of a 1-Wire device. Writing to the Configuration
Register with the 1WS bit as 0, followed by a 1-Wire
Reset command, changes the DS2482-100 and any
1-Wire devices on the active 1-Wire line back to stan-
dard speed.
DS2482-100 RESISTIVE PULLUP
DS2482-100 PULLDOWN
DS2482-100 STRONG PULLUP
VCC
0V
PCTLZ
WRITE-ZERO CASE
WRITE-ONE CASE
tSLOT
LAST BIT OF 1-Wire WRITE BYTE OR 1-Wire SINGLE BIT FUNCTION
NEXT
TIME SLOT
OR 1-Wire
RESET
Figure 3. Low-Impedance Pullup Timing
Single-Channel 1-Wire Master
DS2482-100
Maxim Integrated
7
相关PDF资料 |
PDF描述 |
|---|---|
| DS2482X-101+T | IC MASTER I2C-1WIRE 1CH 9-WLP |
| DS2483Q+T | IC I2C TO 1WIRE BRIDGE 8TDFN |
| DS2490Y | IC BRIDGE CLIP USB TO 1-W 24SOIC |
| DS26303LN-75+A3 | IC LIU E1/T1/J1 3.3V 144-ELQFP |
| DS26324GNA2+ | IC INTERFACE LINE 16CH 256-CSBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2482X-101+T | 功能描述:接口 - 专用 1-Wire Master w/ Sleep Mode 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 |
| DS2482X-101+U | 功能描述:接口 - 专用 SNGL-CH 1-WIRE MASTER w/ SLP MODE 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 |
| DS2483 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Adjustable Timing and Sleep Mode |
| DS2483Q+T | 功能描述:I2C 接口集成电路 Single-Channel 1-Wire Master RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| DS2483Q+U | 功能描述:I2C 接口集成电路 SINGLE-CH 1-WIRE MASTER RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
发布紧急采购，3分钟左右您将得到回复。