參數(shù)資料
型號(hào): DS2408S+
廠商: Maxim Integrated Products
文件頁數(shù): 36/39頁
文件大小: 0K
描述: IC SWITCH 8-CHAN ADDRESS 16SOIC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 50
接口: 1 線
輸入/輸出數(shù): 8
中斷輸出:
電源電壓: 2.8 V ~ 5.25 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC
包裝: 管件
DS2408
6 of 39
APPLICATION
The DS2408 is a multipurpose device. Typical applications include port expander for microcontrollers,
remote multichannel sensor/actuator, communication and control unit of a microterminal, or as network
interface of a microcontroller. Typical application circuits and communication examples are found later
in this data sheet (Figures 17 to 22).
OVERVIEW
Figure 1 shows the relationships between the major function blocks of the DS2408. The device has two
main data components: 1) 64-bit lasered ROM, and 2) 64-bit register page of control and status registers.
Figure 2 shows the hierarchical structure of the 1-Wire protocol. The bus master must first provide one of
the eight ROM function commands: 1) Read ROM, 2) Match ROM, 3) Search ROM, 4) Conditional
Search ROM, 5) Skip ROM, 6) Overdrive-Skip ROM, 7) Overdrive-Match ROM, or 8) Resume. Upon
completion of an Overdrive ROM command byte executed at standard speed, the device will enter
overdrive mode, where all subsequent communication occurs at a higher speed. The protocol required for
these ROM function commands is described in Figure 12. After a ROM function command is success-
fully executed, the control functions become accessible and the master may provide any one of the five
available commands. The protocol for these control commands is described in Figure 8. All data is read
and written least significant bit first.
Figure 1. DS2408 BLOCK DIAGRAM
VCC
64-BIT
LASERED ROM
CRC16
GENERATOR
REGISTER
PAGE
REGISTER
FUNCTION
CONTROL
1-WIRE
FUNCTION
CONTROL
PORT
FUNCTION
CONTROL
I/O
GND
PARASITE POWER
INTERNAL VCC
PORT
INTER-
FACE
RSTZ
P0
P1
P2
P3
P4
P5
P6
P7
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