DS3234S# Maxim Integrated Products, DS3234S# Datasheet - Page 7

• Manufacturer Part Number: DS3234S#
• Description: IC RTC W/TCXO 20-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/TCXO/Crystalr

Specifications of DS3234S#

• Memory Size: 2K (256 x 8)
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Function: Clock/Calendar/Alarm/Battery Backup/Interrupt
• Rtc Memory Size: 256 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial (4-Wire, SPI)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
CC
150
125
100
75
50
25
0
= +3.3V, T
2.3
RST ACTIVE
STANDBY SUPPLY CURRENT
2.8
vs. SUPPLY VOLTAGE
A
3.3
= +25°C, unless otherwise noted.)
V
-15
-25
-35
-45
3.8
CC
55
45
35
25
15
65
-5
5
(V)
-40
Extremely Accurate SPI Bus RTC with
vs. TEMPERATURE vs. AGING VALUE
4.3
INPUTS = GND
-20
4.8
FREQUENCY DEVIATION
AGING = 127
TEMPERATURE (°C)
0
5.3
20
AGING = 0
_____________________________________________________________________
AGING = 32
AGING = -33
-100
-120
-140
-160
-180
-200
40
-20
-40
-60
-80
AGING = -128
20
0
2100
1850
2600
2350
1600
1350
1100
850
600
-40
CRYSTAL
+20ppm
60
-30 -20
Integrated Crystal and SRAM
2.3
DELTA TIME AND FREQUENCY
V
BB32kHz = 0
CC
CRYSTAL
80
-20ppm
-10 0 10 20 30 40
= 0V
vs. TEMPERATURE
TEMPERATURE (°C)
vs. SUPPLY VOLTAGE
TYPICAL CRYSTAL,
UNCOMPENSATED
SUPPLY VOLTAGE (V
BATTERY CURRENT
2.8
ACCURACY
BBSQW = 1
Typical Operating Characteristics
DS3234
BAND
BBSQW = 0
50 60
3.3
BAT
450
350
300
250
500
400
200
DS3234 toc06
)
70
0
80
0
-20
-40
-60
-80
-100
3.8
10
I
CCA
CAPACITANCE (pF)
vs. DOUT LOAD
20
850
800
750
700
650
600
-40
30
V
BB32kHz = 0
BBSQW = 0
SCLK = 4MHz
CC
-20
= 0V
BATTERY CURRENT
vs. TEMPERATURE
40
TEMPERATURE (°C)
0
20
40
V
BAT
V
BAT
60
= 3.4V
= 3.0V
80
7