Junction Temperature .....................................................+150°C
Storage Temperature Range…………………… -55°C to +125°C
ESD Protection (All Pins, Human Body Model)................±2000V
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC Electrical Characteristics
(V
CC
= +2.0V to +5.5V, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Operating Voltage
Range
Active Supply Current
(Note 2)
Timekeeping Supply
Current (Note 3)
SYMBOL
V
CC
I
CC
V
CC
= +2V
V
CC
= +5V
V
CC
= +2V
I
TK
V
CC
= +3.6V
V
CC
= +5V
SPI DIGITAL INPUTS (SCLK, DIN,
CS)
Input High Voltage
Input Low Voltage
Input Leakage Current
V
IH
V
IL
I
IL
V
CC
= +2V
V
CC
= +5V
V
CC
= +2V
V
CC
= +5V
V
IN
= 0 to V
CC
(Note 4)
CS
= V
IH
(Note 4)
V
CC
= +2V, I
SINK
= 1.5mA
V
CC
= +5V, I
SINK
= 4mA
V
CC
= +2V, I
SOURCE
= -0.4mA
V
CC
= +5V, I
SOURCE
= -1mA
1.8
4.5
-0.1
15
0.4
0.4
-0.1
10
+0.1
1.4
2.2
0.6
0.8
+0.1
V
V
μA
pF
μA
pF
V
V
0.35
0.35
0.4
CONDITIONS
MIN
2
TYP
MAX
5.5
0.1
0.25
0.7
0.7
0.8
μA
UNITS
V
mA
Input Capacitance
C
IN
SPI DIGITAL OUTPUT (DOUT)
Output Leakage Current
Output Capacitance
Output Low Voltage
Output High Voltage
I
O
C
OUT
V
OL
V
OH
www.maximintegrated.com
Maxim Integrated | 2
DS1347
Low-Current, SPI-Compatible
Real-Time Clock
AC Electrical Characteristics
(V
CC
= +2.0V to +5.5V, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
(Figure 5, Notes 1, 5)
PARAMETER
SPI SERIAL TIMING
Input Rise Time
Input Fall Time
Output Rise Time
Output Fall Time
SCLK Period
SCLK High Time
SCLK Low Time
SCLK Fall to DOUT
Valid
DIN to SCLK Setup
Time
DIN to SCLK Hold
Time
SCLK Rise to
CS
Rise Hold Time
CS
High Pulse Width
CS
High to DOUT
High Impedance
CS
to SCLK Setup
Time
t
rIN
t
fIN
t
rOUT
t
fOUT
t
CP
t
CH
t
CL
t
DO
t
DS
t
DH
t
CSH
t
CSW
t
CSZ
t
CSS
100
V
CC
= +2V
V
CC
= +5V
V
CC
= +2V, C
LOAD
= 100pF
V
CC
= +5V, C
LOAD
= 100pF
100
20
200
50
200
100
DIN, SCLK,
CS
DIN, SCLK,
CS
DOUT, C
LOAD
= 100pF
DOUT, C
LOAD
= 100pF
V
CC
= +2V
V
CC
= +5V
1000
238
100
100
300
100
5
5
10
10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
All parameters are 100% tested at T
A
= +25°C. Limits over temperature are guaranteed by design and characterization and
not production tested.
Note 2:
I
CC
is specified with DOUT open,
CS
= DIN = GND, SCLK = 4MHz at V
CC
= +5V; SCLK = 1MHz at V
CC
= +2.0V.
Note 3:
Timekeeping current is specified with
CS
= V
CC
, SCLK = DIN = GND, DOSF = 0, EGFIL = 1.
Note 4:
Guaranteed by design and not 100% production tested.
Note 5:
All values referred to V
IH(MIN)
and V
IL(MAX)
levels.
Crystal Characteristics
PARAMETER
Nominal Frequency
Series Resistance
Load Capacitance
SYMBOL
f
O
ESR
C
L
12.5
CONDITIONS
MIN
TYP
32.768
100
MAX
UNITS
kHz
k
pF
www.maximintegrated.com
Maxim Integrated | 3
DS1347
Low-Current, SPI-Compatible
Real-Time Clock
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS1347 toc01
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
T
A
= +25°C,
CS = V
CC
EGFIL = 1,
DOSF = 0
DS1347 toc02
120
100
SUPPLY CURRENT (μA)
80
60
40
f
SCLK
= 1MHz
20
0
2
3
4
SUPPLY VOLTAGE (V)
5
6
f
SCLK
= 4MHz
T
A
= +25°C,
I
OUT
= 0mA,
CS = DIN = GND
400
SUPPLY CURRENT (nA)
350
300
250
EGFIL = 0,
DOSF = 0
EGFIL = 0,
DOSF = 1
200
2
3
4
SUPPLY VOLTAGE (V)
5
6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CS = V
CC
,
EGFIL = DOSF = 0
SUPPLY CURRENT (nA)
+85°C
DS1347 toc03
500
400
+70°C
+25°C
300
0°C
200
2
3
4
SUPPLY VOLTAGE (V)
5
-40°C
6
www.maximintegrated.com
Maxim Integrated | 4
DS1347
Low-Current, SPI-Compatible
Real-Time Clock
Pin Configuration
TOP VIEW
+
SCLK 1
DOUT 2
8
7
X1
X2
V
CC
CS
DS1347
DIN
3
EP
6
5
GND 4
TDFN
Pin Description
PIN
1
2
3
4
5
6
7
8
—
NAME
SCLK
DOUT
DIN
GND
CS
V
CC
X2
X1
EP
FUNCTION
Serial-Clock Input. SCLK is used to synchronize data movement on the serial interface for either 3-wire or
SPI communications.
Serial-Data Output. When SPI communication is enabled, the DOUT pin is the serial-data output for the SPI
bus.
Serial-Data Input. When SPI communication is enabled, the DIN pin is the serial-data input for the SPI bus.
Ground
Active-Low Chip Select. The chip-enable signal must be asserted low during a read or a write for SPI
communications.
Power-Supply Input
Connections for Standard 32.768kHz Quartz Crystal (see the
[size=4]1. What is GPIO? [/size] [size=4]GPIO, in English, is called General-Purpose IO ports. Embedded systems often have a large number of external devices/circuits with relatively simple structures...
Sorry, I need 2 more ChipCoins, but I need them now because I want to buy something new. I have no choice but to ask for your understanding. Thank you....
What module is used in the middle? I looked at the disassembly of the Xiaotiancai watch, but I didn't see this part. I only saw the card slot. I hope the master can guide me...
I wanted to study FreeRTOS recently, so I downloaded the 7.1.1 version of the kernel. After compiling the MSP430-related code with IAR, it ran well on the MSP430f149 (the LED flashed happily ~ other f...
I have studied it for a long time, but I can't figure it out. Has anyone used Altera's PCIe IP core? ? ? Urgent! ! ! Thank you! ! ! Please help me......
Be nice to your own board in the future. No one knows what it will experience after leaving you. I squeezed out some time these two days to port FreeRTOS. It's just a joke without too many details.The...
Current Development Status of DVR Market
A DVR, or digital video recorder, uses a hard disk for recording, unlike traditional analog video recorders. It's often called a DVR because it's a com...[Details]
On August 25th, SK Hynix announced that it has completed development and entered mass production of its 321-layer, 2Tb QLC NAND flash memory product. This achievement marks the world's first applic...[Details]
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[Details]
Electric vehicles' 12V batteries don't rely on a generator to power them. Only gasoline-powered vehicles rely on the engine to drive a generator to generate electricity while driving, which is used...[Details]
With the increasing number of new energy vehicles on the road, the deployment of supporting facilities for these vehicles has accelerated, and new energy vehicles have gradually entered the vision ...[Details]
A multilevel inverter converts a DC signal into a multilevel staircase waveform. Instead of a straight positive-negative output waveform, the output waveform of a multilevel inverter alternates in ...[Details]
According to Nikkei, Japan has performed poorly in responding to China's power semiconductor challenges.
There are five major companies in Japan's power chip market: Mitsubishi Electric,...[Details]
A human-machine interface (HMI) refers to the platform used by people to operate a PLC. This platform provides an interface between programs and humans, serving as a medium for information transmis...[Details]
Lightweighting of automobiles is still a relatively unfamiliar term for automobiles. With the continuous improvement of environmental protection requirements, relevant regulations have also put for...[Details]
With the gradual popularization of new energy vehicles in recent years, more and more people have been able to access and purchase electric vehicles. The structure of electric vehicles is composed ...[Details]
In camera and display systems, the demand for high-performance and low-power data interfaces is driving continuous technological evolution. The evolution of MIPI D-PHY and MIPI C-PHY clearly ...[Details]
0 Introduction
With a rapidly aging population, a young couple is now required to care for an increasing number of elderly people, leading to a growing difficulty in providing care for them. E...[Details]
Traditionally, electrical energy is transmitted primarily through wires, requiring direct physical contact between the power source and the load. With the increasing number of electrical devices in...[Details]
The Waveshare ESP32-P4-ETH is a compact ESP32-P4 development board with Ethernet and PoE support. It looks very similar to the Olimex ESP32-P4-DevKit, minus the pUEXT connector. However, we've also...[Details]
At present, the most troubling thing about pure electric vehicles as new energy sources is not only the range anxiety, but also the disadvantage of long charging time. At present, ternary lithium b...[Details]
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
