Datasheet> 器件分类 > 嵌入式处理器和控制器> 微控制器和处理器> MAX6917EO33+T

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MAX6917EO33+T: 产品描述Real Time Clock Integrated Circuits (ICs); 产品类别嵌入式处理器和控制器微控制器和处理器; 文件大小306KB，共31页; 制造商Maxim(美信半导体); 官网地址https://www.maximintegrated.com/en.html; 标准

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MAX6917EO33+T概述

Real Time Clock Integrated Circuits (ICs)

MAX6917EO33+T规格参数

参数名称	属性值
是否Rohs认证	符合
厂商名称	Maxim(美信半导体)
零件包装代码	SSOP
包装说明	SSOP, SSOP20,.25
针数	20
Reach Compliance Code	compliant
ECCN代码	EAR99
最大时钟频率	0.032 MHz
信息访问方法	I2C
中断能力	Y
JESD-30 代码	R-PDSO-G20
JESD-609代码	e3
长度	8.65 mm
湿度敏感等级	1
端子数量	20
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	SSOP
封装等效代码	SSOP20,.25
封装形状	RECTANGULAR
封装形式	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）	260
电源	3.3 V
认证状态	Not Qualified
座面最大高度	1.73 mm
最大供电电压	3.6 V
最小供电电压	3 V
标称供电电压	3.3 V
表面贴装	YES
技术	CMOS
温度等级	INDUSTRIAL
端子面层	Matte Tin (Sn)
端子形式	GULL WING
端子节距	0.635 mm
端子位置	DUAL
最短时间	SECONDS
处于峰值回流温度下的最长时间	NOT SPECIFIED
易失性	NO
宽度	3.9 mm
uPs/uCs/外围集成电路类型	TIMER, REAL TIME CLOCK

文档解析

MAX6917芯片的I2C通信协议中，起始条件（START）和停止条件（STOP）的配置如下：

起始条件（START）：
- 起始条件由SDA线上的高到低的跳变，同时SCL线保持高电平来定义。也就是说，当SDA线在SCL线为高（HIGH）状态时，从高电平（HIGH）跳变到低电平（LOW），就会产生一个起始条件。
停止条件（STOP）：
- 停止条件由SDA线上的低到高的跳变，同时SCL线保持高电平来定义。也就是说，当SDA线在SCL线为高（HIGH）状态时，从低电平（LOW）跳变到高电平（HIGH），就会产生一个停止条件。

在I2C通信中，数据传输只能在总线不忙（即SDA和SCL都为高电平）时开始。起始条件标志着一次数据传输的开始，而停止条件则标志着一次数据传输的结束。

此外，MAX6917的数据手册还提到了重复起始条件（Repeated START），它允许在不释放SDA线的情况下，通过在SCL线为高电平时，再次将SDA线从高电平跳变到低电平，来开始另一次数据传输。这允许在单次通信会话中连续传输多条消息。

这些条件是I2C总线协议的一部分，用于确保数据在连接到同一I2C总线的多个设备之间正确地同步和传输。MAX6917芯片上的I2C接口遵循这些标准条件，以实现与其他I2C兼容设备的通信。

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19-3702; Rev 1; 10/05

C-Compatible RTC with Microprocessor

Supervisor, Alarm, and NV RAM Controller

General Description

The MAX6917 provides all the features of a real-time

clock (RTC) plus a microprocessor (µP) supervisory cir-

cuit, NV RAM controller, and backup-battery monitor

function. In addition, 96 x 8 bits of static RAM are avail-

able for scratchpad storage. The MAX6917 communi-

cates with a µP through an I

C-bus-compatible serial

interface.

The real-time clock/calendar provides seconds, min-

utes, hours, day, date, month, and year information.

The end of the month date is automatically adjusted for

months with fewer than 31 days, including corrections

for leap years through 2099. The clock operates in

either 24hr or 12hr format with an AM/PM indicator. A

time/date-programmable alarm function is provided

with an open-drain, active-low alarm output.

The µP supervisory circuit features an open-drain,

active-low reset available in three different reset thresh-

olds. A manual reset input and a watchdog function are

included as well.

The NV RAM controller provides power for external SRAM

from a backup battery plus chip-enable gating. The back-

up battery also provides data retention of the on-board 96

x 8 bits of RAM. An open-drain, active-low, battery-on sig-

nal alerts the system when operating from a battery.

The battery-test circuitry periodically tests the backup

battery for a low-battery condition. An optional external

resistor network selects different battery thresholds. A

freshness seal prevents battery drain until the first V

power-up.

The MAX6917 has a crystal-fail-detect circuit and a

data-valid bit. The MAX6917 is available in a 20-pin

QSOP package and is guaranteed to operate over the

extended (-40°C to +85°C) temperature range.

Features

♦

Real-Time Clock Counts

Seconds, Minutes, Hours, Date,

Month, Day of Week, and Year

with Leap-Year Compensation Through 2099

♦

Fast (400kHz) I

C-Bus-Compatible Interface

♦

96 x 8 Bits of RAM for Scratchpad Data Storage

♦

Uses Standard 32.768kHz, 6pF Load, Watch

Crystal

♦

Single-Byte or Multiple-Byte (Burst Mode) Data

Transfer for Read or Write of Clock Registers or

RAM

♦

Battery Monitor and Low-Battery Warning Output

Internal Default for Lithium Backup-Battery

Testing

Pins Available for Other Backup-Battery

Testing Configurations

♦

Dual Power-Supply Pins for Primary and Backup

Power

♦

Battery-On Output

♦

NV RAM Controller

Chip-Enable Gating (Control of

with Reset

and Power Valid)

OUT

for SRAM Power

♦

Microprocessor Supervisor with Watchdog Input

♦

Programmable Time/Date Alarm Output

♦

Data Valid Bit (Loss of All Voltage Alerts User of

Corrupt Data)

♦

Crystal-Fail Detect

♦

Reference Output Frequencies—1Hz and

32.768kHz

♦

Small, 20-Pin, QSOP Surface-Mount Package

MAX6917

Applications

Point-of-Sale Equipment

Programmable Logic Controllers

Intelligent Instruments

Fax Machines

Digital Thermostats

Industrial Control

Pin Configuration and Selector Guide appear at end of data

sheet.

Ordering Information

PART

MAX6917EO30+

MAX6917EO33+

MAX6917EO50+

TEMP RANGE

-40°C to +85°C

PIN-

PACKAGE

20 QSOP

PKG

CODE

E20-2

+Denotes

lead-free package.

________________________________________________________________

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX6917EO33+T相似产品对比

	MAX6917EO33+T	MAX6917EO30+	MAX6917EO50	MAX6917EO50+	MAX6917EO33+	MAX6917EO30+T	MAX6917EO50+T
描述	Real Time Clock Integrated Circuits (ICs)	Real Time Clock Integrated Circuits (ICs)	Real Time Clock	IC RTC I2C COMPAT 20-QSOP	IC RTC I2C COMPAT 20-QSOP	IC RTC I2C COMPAT 20-QSOP	IC RTC I2C COMPAT 20-QSOP
是否Rohs认证	符合	符合	不符合	符合	符合	符合	符合
厂商名称	Maxim(美信半导体)	Maxim(美信半导体)	Maxim(美信半导体)	Maxim(美信半导体)	Maxim(美信半导体)	Maxim(美信半导体)	Maxim(美信半导体)
零件包装代码	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
包装说明	SSOP, SSOP20,.25	SSOP, SSOP20,.25	0.150 INCH, 0.025 INCH PITCH, MO-137AD, QSOP-20	SSOP, SSOP20,.25	SSOP, SSOP20,.25	SSOP, SSOP20,.25	SSOP, SSOP20,.25
针数	20	20	20	20	20	20	20
Reach Compliance Code	compliant	compliant	not_compliant	compliant	compliant	compliant	compliant
ECCN代码	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
最大时钟频率	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz
信息访问方法	I2C	I2C	I2C	I2C	I2C	I2C	I2C
中断能力	Y	Y	Y	Y	Y	Y	Y
JESD-30 代码	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20
JESD-609代码	e3	e3	e0	e3	e3	e3	e3
长度	8.65 mm	8.65 mm	8.65 mm	8.65 mm	8.65 mm	8.65 mm	8.65 mm
湿度敏感等级	1	1	1	1	1	1	1
端子数量	20	20	20	20	20	20	20
最高工作温度	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
最低工作温度	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
封装等效代码	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25
封装形状	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）	260	260	245	260	260	260	260
电源	3.3 V	3 V	5 V	5 V	3.3 V	3 V	5 V
认证状态	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
座面最大高度	1.73 mm	1.73 mm	1.73 mm	1.73 mm	1.73 mm	1.73 mm	1.73 mm
最大供电电压	3.6 V	3.3 V	5.5 V	5.5 V	3.6 V	3.3 V	5.5 V
最小供电电压	3 V	2.7 V	4.5 V	4.5 V	3 V	2.7 V	4.5 V
标称供电电压	3.3 V	3 V	5 V	5 V	3.3 V	3 V	5 V
表面贴装	YES	YES	YES	YES	YES	YES	YES
技术	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
温度等级	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
端子面层	Matte Tin (Sn)	Matte Tin (Sn)	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
端子形式	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
端子节距	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm
端子位置	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
最短时间	SECONDS	SECONDS	SECONDS	SECONDS	SECONDS	SECONDS	SECONDS
处于峰值回流温度下的最长时间	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
易失性	NO	NO	NO	NO	NO	NO	NO
宽度	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm
uPs/uCs/外围集成电路类型	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK

MAX6917EO33+T

MAX6917EO33+T概述

MAX6917EO33+T规格参数

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