Datasheet > DS2408S/T&R

DS2408S/T&R

更新时间： 2024-02-26 09:54:08

品牌	Logo	应用领域
美信 - MAXIM		光电二极管外围集成电路
页数	文件大小	规格书
36页	539K
描述
Parallel I/O Port, 8 I/O, CMOS, PDSO16, 0.150 INCH, SOP-16

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技术参数
数据手册

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DS2408S/T&R 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	0.150 INCH, SOP-16
针数：	16	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.36	JESD-30 代码：	R-PDSO-G16
JESD-609代码：	e0	长度：	9.9 mm
I/O 线路数量：	8	端口数量：	1
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	245
认证状态：	Not Qualified	座面最大高度：	1.75 mm
最大供电电压：	5.25 V	最小供电电压：	2.8 V
标称供电电压：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	3.9 mm
uPs/uCs/外围集成电路类型：	PARALLEL IO PORT, GENERAL PURPOSE	Base Number Matches：	1

DS2408S/T&R 数据手册

DS2408

After all DS2408s are initialized, perform the search process below as an endless loop:

MASTER MODE

DATA (LSB FIRST)

(Reset)

COMMENTS

Step 4

Reset pulse

(Presence)

ECh

Presence pulse

Issue Conditional Search ROM command

Read 2 bits; if both bits are 1, no push button

has been pressed; in this case return to Step

4. If the bit pattern is 01 or 10 or 00, a push

button has been pressed; in this case

continue with Step 5.

<2 bits>

Identify and select the LS bit of the ROM ID

of the DS2408 that has responded to the

Conditional Search.

Step 5

<1 bits>

<2 bits>

<1 bits>

Read 2 bits; this relates to the next bit of the

ROM ID of the participating device(s).

Identify and select the next bit of the ROM ID

of the DS2408 that has responded to the

Conditional Search.

Repeat the previous 2 steps until one device

(—)

has been identified and accessed. (see Note

F0h

88h

00h

Issue Read PIO Registers command

TA1, target address = 88h

TA2, target address = 0000h

Read register page; the data in the Activity

Latch State Register tells which button has

been pressed.

<8 data bytes>

Read CRC16 and verify correct data

<2 bytes CRC16>

transmission.

(Reset)

(Presence)

A5h

Reset pulse

Presence pulse

Issue Resume command

Issue Reset Activity Latch command

Read for verification (AAh = success)

AAh

Now, as the device and push button are

identified and the Activity Latch is cleared,

continue at Step 4.

(—)

Note 1: For a full description of the Search Algorithm see Application Note 187.

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