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參數資料
| 型號： | DS2408S+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/39頁 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 8-CHAN ADDRESS 16SOIC |
| 標準包裝： | 2,500 |
| 接口： | 1 線 |
| 輸入/輸出數： | 8 |
| 中斷輸出： | * |
| 電源電壓： | 2.8 V ~ 5.25 V |
| 工作溫度： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-SOIC |
| 包裝： | 帶卷 (TR) |
| 包括： | * |
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AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
DS2408
1-Wire 8-Channel Addressable Switch
FEATURES
Eight Channels of Programmable I/O with
Open-Drain Outputs
On-Resistance of PIO Pulldown Transistor
100 (max); Off-Resistance 10M (typ)
Individual Activity Latches Capture
Asynchronous State Changes at PIO Inputs for
Interrogation by the Bus Master
Data-Strobe Output to Synchronize PIO Logic
States to External Read/Write Circuitry
Built-in Multidrop Controller Ensures
Compatibility with Other Dallas Semiconductor
1-Wire Net Products
Supports 1-Wire Conditional Search Command
with Response Controlled by Programmable
PIO Conditions
Unique Factory-Lasered 64-Bit Registration
Number Ensures Error-Free Device Selection
and Absolute Part Identity
Communicates to Host with a Single Digital
Signal at 15.3kbps or 100kbps using 1-Wire
Protocol
Operating Range: 2.8V to 5.25V, -40°C to
+85°C
PIN CONFIGURATION
150-mil SO
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS2408S+
-40°C to +85°C
16 SO
DS2408S+T&R -40°C to +85°C
16 SO
+Denotes a lead(Pb)-free package.
T&R = Tape and reel.
DESCRIPTION
The DS2408 is an 8-channel, programmable I/O 1-Wire chip. PIO outputs are configured as open-drain and
provide an on resistance of 100 max. A robust PIO channel-access communication protocol ensures that PIO
output-setting changes occur error-free. A data-valid strobe output can be used to latch PIO logic states into
external circuitry such as a D/A converter (DAC) or microcontroller data bus.
DS2408 operation is controlled over the single-conductor 1-Wire bus. Device communication follows the
standard Dallas Semiconductor 1-Wire protocol. Each DS2408 has its own unalterable and unique 64-bit
ROM registration number that is factory lasered into the chip. The registration number guarantees unique
identification and is used to address the device in a multidrop 1-Wire net environment. Multiple DS2408
devices can reside on a common 1-Wire bus and can operate independently of each other. The DS2408 also
supports 1-Wire conditional search capability based on PIO conditions or power-on-reset activity; the
conditions to cause participation in the conditional search are programmable. The DS2408 has an optional VCC
supply connection. When an external supply is absent, device power is supplied parasitically from the 1-Wire
bus. When an external supply is present, PIO states are maintained in the absence of the 1-Wire bus power
source. The RSTZ signal is configurable to serve as either a hard-wired reset for the PIO output or as a strobe
for external circuitry to indicate that a PIO write or PIO read has completed.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
19-5702; 12/10
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