MAX6916EO50+T datasheet, PDF - EEWORLD Datasheet

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MAX6916EO50+T: DescriptionReal Time Clock Integrated Circuits (ICs); CategoryThe embedded processor and controller Microcontrollers and processors; File Size329KB，28 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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MAX6916EO50+T Overview

Real Time Clock Integrated Circuits (ICs)

MAX6916EO50+T Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	SSOP
package instruction	SSOP, SSOP20,.25
Contacts	20
Reach Compliance Code	compliant
ECCN code	EAR99
maximum clock frequency	0.032 MHz
Information access methods	I2C
interrupt capability	Y
JESD-30 code	R-PDSO-G20
JESD-609 code	e3
length	8.65 mm
Humidity sensitivity level	1
Number of digits	8
Number of terminals	20
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Encapsulate equivalent code	SSOP20,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
power supply	5 V
Certification status	Not Qualified
Maximum seat height	1.73 mm
Maximum supply voltage	5.5 V
Minimum supply voltage	4.5 V
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.635 mm
Terminal location	DUAL
shortest time	SECONDS
Maximum time at peak reflow temperature	30
Volatile	NO
width	3.9 mm
uPs/uCs/peripheral integrated circuit type	TIMER, REAL TIME CLOCK

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19-3694; Rev 0; 10/05

SPI-Compatible RTC with Microprocessor

Supervisor, Alarm, and NV RAM Controller

General Description

The MAX6916 provides all the features of a real-time

clock (RTC) plus a microprocessor supervisory circuit,

NV RAM controller, and backup-battery monitor func-

tion. In addition, 96 x 8 bits of static RAM are available

for scratchpad storage. The MAX6916 communicates

with a microprocessor through an SPI™-bus-compati-

ble 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 microprocessor supervisory circuit features an

open-drain, active-low reset available in three different

reset thresholds. 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 MAX6916 has a crystal-fail-detect circuit and a

data-valid bit. The MAX6916 is available in a 20-pin

QSOP package and is guaranteed to operate over the

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

Features

Real-Time Clock Counts

Seconds, Minutes, Hours, Date, Month, Day of

Week, and Year with Leap-Year Compensation

Through 2099

4MHz SPI-Bus-Compatible Interface at 5V, 2MHz

at 3V, and 3.3V

SPI Interface Supports Modes 1 and 3 (0, 1 and 1, 1)

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

µP Supervisor with Watchdog Input

Programmable Time/Date Alarm Output

Data Valid Bit (Loss of All Voltage Alerts User of

Corrupt Data)

Crystal-Fail Detect

Small 20-Pin, QSOP Surface-Mount Package

MAX6916

Applications

Point-of-Sale Equipment

Programmable Logic Controllers

Intelligent Instruments

Fax Machines

Digital Thermostats

Industrial Controls

Pin Configuration and Selector Guide appear at end of data

sheet.

SPI is a trademark of Motorola, Inc.

Ordering Information

PART

MAX6916EO30+

MAX6916EO33+

MAX6916EO50+

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.

MAX6916EO50+T Related Products

	MAX6916EO50+T	MAX6916EO30+T	MAX6916EO33+T	MAX6916EO33+	MAX6916EO30+	MAX6916EO50+
Description	Real Time Clock Integrated Circuits (ICs)	Real Time Clock Integrated Circuits (ICs)	Real Time Clock Integrated Circuits (ICs)	IC RTC SPI COMPAT 20-QSOP	IC RTC SPI COMPAT 20-QSOP	IC RTC SPI COMPAT 20-QSOP
Is it Rohs certified?	conform to	conform to	conform to	conform to	conform to	conform to
Maker	Maxim	Maxim	Maxim	Maxim	Maxim	Maxim
Parts packaging code	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
package instruction	SSOP, SSOP20,.25	SSOP, SSOP20,.25	SSOP, SSOP20,.25	SSOP, SSOP20,.25	SSOP, SSOP20,.25	SSOP, SSOP20,.25
Contacts	20	20	20	20	20	20
Reach Compliance Code	compliant	compliant	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
maximum clock frequency	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz	0.032 MHz
Information access methods	I2C	I2C	I2C	I2C	I2C	I2C
interrupt capability	Y	Y	Y	Y	Y	Y
JESD-30 code	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20
JESD-609 code	e3	e3	e3	e3	e3	e3
length	8.65 mm	8.65 mm	8.65 mm	8.65 mm	8.65 mm	8.65 mm
Number of digits	8	8	8	8	8	8
Number of terminals	20	20	20	20	20	20
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
Encapsulate equivalent code	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25	SSOP20,.25
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260	260	260	260	260	260
power supply	5 V	3 V	3.3 V	3.3 V	3 V	5 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.73 mm	1.73 mm	1.73 mm	1.73 mm	1.73 mm	1.73 mm
Maximum supply voltage	5.5 V	3.3 V	3.6 V	3.6 V	3.3 V	5.5 V
Minimum supply voltage	4.5 V	2.7 V	3 V	3 V	2.7 V	4.5 V
Nominal supply voltage	5 V	3 V	3.3 V	3.3 V	3 V	5 V
surface mount	YES	YES	YES	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
shortest time	SECONDS	SECONDS	SECONDS	SECONDS	SECONDS	SECONDS
Maximum time at peak reflow temperature	30	30	NOT SPECIFIED	30	30	30
Volatile	NO	NO	NO	NO	NO	NO
width	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm
uPs/uCs/peripheral integrated circuit type	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK	TIMER, REAL TIME CLOCK
Is it lead-free?	-	-	Lead free	Lead free	Lead free	Lead free

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