DS1374U-33 Maxim Integrated Products, DS1374U-33 Datasheet

no-image

DS1374U-33

Manufacturer Part Number
DS1374U-33
Description
Real Time Clock I2C-Compatible 32-Bi t Binary Counter Wat
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1374U-33

Function
Clock, Calendar, Elapsed Time Counter, Watchdog Timekeeper
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.97 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Rtc Bus Interface
Serial
Package / Case
uSOP
Time Format
Binary

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS1374U-33+
Manufacturer:
Maxim
Quantity:
8 380
Part Number:
DS1374U-33+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
DS1374U-33+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
DS1374U-33+T&R
Manufacturer:
MAXIM
Quantity:
200
Part Number:
DS1374U-33+T&R
Manufacturer:
MAXIM
Quantity:
6 000
Part Number:
DS1374U-33+T&R
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
DS1374U-33+T&R
Quantity:
3 000
Part Number:
DS1374U-33+TR
Manufacturer:
TXC
Quantity:
280
Part Number:
DS1374U-33+TR
Manufacturer:
DALLAS
Quantity:
20 000
The DS1374 is a 32-bit binary counter designed to contin-
uously count time in seconds. An additional counter gen-
erates a periodic alarm or serves as a watchdog timer. If
disabled, this counter can be used as 3 bytes of non-
volatile (NV) RAM. Separate output pins are provided for
an interrupt and a square wave at one of four selectable
frequencies. A precision temperature-compensated refer-
ence and comparator circuit monitor the status of V
detect power failures, provide a reset output, and auto-
matically switch to the backup supply when necessary.
Additionally, the reset pin is monitored as a pushbutton
input for externally generating a reset. The device is pro-
grammed serially through an I
19-5484; Rev 4; 8/10
Pin Configurations appear at the end of the data sheet.
# Denotes a RoHS-compliant device that may include lead that is exempt under RoHS requirements. The lead finish is JESD97 category
e3, and is compatible with both lead-based and lead-free soldering processes.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
** A "#" anywhere on the top mark denotes a RoHS-compliant package. A “+” anywhere on the top mark denotes a lead(Pb)-free
package.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
DS1374C-18#
DS1374C-3#
DS1374C-33#
DS1374U-18+
DS1374U-3+
DS1374U-33+
Portable Instruments
Point-of-Sale Equipment
Medical Equipment
Telecommunications
PART
I
2
C, 32-Bit Binary Counter Watchdog RTC with
General Description
Trickle Charger and Reset Input/Output
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
2
C serial interface.
Applications
______________________________________________ Maxim Integrated Products
CC
VOLTAGE (V)
to
1.8
3.0
3.3
1.8
3.0
3.3
♦ 32-Bit Binary Counter
♦ Second Binary Counter Provides Time-of-Day
♦ Separate Square-Wave and Interrupt Output Pins
♦ I
♦ Automatic Power-Fail Detect and Switch Circuitry
♦ Single-Pin Pushbutton Reset Input/Open-Drain
♦ Low-Voltage Operation
♦ Trickle-Charge Capability
♦ -40°C to +85°C Operating Temperature Range
♦ 10-Pin µSOP, 16-Pin SO
♦ Available in a Surface-Mount Package with an
♦ Underwriters Laboratories (UL) Recognized
Alarm, Watchdog Timer, or NV RAM
Reset Output
Integrated Crystal (DS1374C)
2
C Serial Interface
RPU = t
CPU
V
CC
RST
INT
RPU
r
/C
PUSHBUTTON
PIN-PACKAGE
16 SO (300 mils)
16 SO (300 mils)
16 SO (300 mils)
10 μSOP
10 μSOP
10 μSOP
B
RPU
RESET
N.O.
V
CC
Typical Operating Circuit
X1
SCL
SDA
RST
INT
Ordering Information
CRYSTAL
X2
DS1374
GND
V
BACKUP
TOP MARK**
DS1374C-18
DS1374C-3
DS1374C-33
DS1374-18
DS1374-3
DS1374-33
V
V
SQW
CC
CC
Features
PRIMARY
BATTERY,
RECHARGEABLE
BATTERY, OR
SUPER CAPACITOR
1

Related parts for DS1374U-33

DS1374U-33 Summary of contents

Page 1

... DS1374U-18+ -40°C to +85°C DS1374U-3+ -40°C to +85°C DS1374U-33+ -40°C to +85°C # Denotes a RoHS-compliant device that may include lead that is exempt under RoHS requirements. The lead finish is JESD97 category e3, and is compatible with both lead-based and lead-free soldering processes. + Denotes a lead(Pb)-free/RoHS-compliant package. ...

Page 2

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output ABSOLUTE MAXIMUM RATINGS Voltage Range on V Pin Relative to Ground .....-0.3V to +6.0V CC Voltage Range on SDA or SCL Relative to Ground ....................................-0.3V to ...

Page 3

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output DC ELECTRICAL CHARACTERISTICS ( -40°C to +85°C, unless otherwise noted.) (Note 2) CC CC(MIN) CC(MAX) A PARAMETER SYMBOL Trickle-Charge ...

Page 4

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output AC ELECTRICAL CHARACTERISTICS ( -40°C to +85°C, unless otherwise noted.) (Note 2) (Figure 1) CC CC(MIN) CC(MAX) A PARAMETER ...

Page 5

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output POWER-UP/POWER-DOWN CHARACTERISTICS (T = -40°C to +85°C) (Figure 3) A PARAMETER SYMBOL V Detect to Recognize Inputs CC (V Rising Fall Time ...

Page 6

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output SDA t BUF t LOW SCL t HD:STA STOP START 2 Figure 1. Data Transfer Serial Bus RST PB DB Figure 2. Pushbutton ...

Page 7

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output (V = +3.3V +25°C, unless otherwise noted vs. V BAT0SC1 BAT SQUARE-WAVE OFF 550 500 450 400 ...

Page 8

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output PIN NAME μSOP SO Connections for a Standard 32.768kHz Quartz Crystal. The internal oscillator circuitry is designed for operation with a crystal having a specified load ...

Page 9

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output Table 1. Crystal Specifications* PARAMETER SYMBOL MIN Nominal f 32.768 O Frequency Series ESR Resistance Load C L Capacitance * The crystal, traces, and crystal input ...

Page 10

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output Power Control The power-control function is provided by a precise, temperature-compensated voltage reference and a comparator circuit that monitors the V device is fully accessible and ...

Page 11

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output Watchdog/Alarm Counter The contents of the watchdog/alarm counter, which is a separate 24-bit down counter, are accessed in the address range 04h–06h. When this counter is ...

Page 12

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output Bit 7 Bit 6 Bit 5 EOSC WACE WD/ALM Special Purpose Registers The DS1374 has two additional registers (07h–08h) that control the WD/ALM counter and the ...

Page 13

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output Bit 7 Bit 6 Bit 5 OSF 0 Status Register (08h) Bit 7/Oscillator Stop Flag (OSF). A logic 1 in this bit indicates that the oscillator ...

Page 14

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output BIT 7 BIT 6 BIT 5 TCS3 TCS2 TCS1 SELECT NOTE: ONLY 1010b ENABLES CHARGER V CC Figure 7. Programmable Trickle Charger SDA ...

Page 15

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output SLAVE REGISTER ADDRESS ADDRESS (n) DATA (n) DATA ( 1101000 0 A XXXXXXXX A XXXXXXXX A XXXXXXXX A XXXXXXXX S - START DATA ...

Page 16

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output After the DS1374 acknowledges the slave address + write bit, the master transmits a register address to the DS1374. This sets the register pointer on the ...

Page 17

I C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output TOP VIEW BACKUP RST 4 GND 5 Chip Information PROCESS: CMOS SUBSTRATE CONNECTED TO GROUND SCL INT ...

Page 18

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc ...

Related keywords