DS3234S# Maxim Integrated Products, DS3234S# Datasheet - Page 2

• 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

ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground......-0.3V to +6.0V
Junction-to-Ambient Thermal Resistance (θ
Junction-to-Case Thermal Resistance (θ
Operating Temperature Range
RECOMMENDED OPERATING CONDITIONS
(T
ELECTRICAL CHARACTERISTICS
(V
3.3V, V
V
Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
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.
2
Supply Voltage
Logic 1 Input
Logic 0 Input
BAT
Active Supply Current
Standby Supply Current
Temperature Conversion Current
Power-Fail Voltage
V
(V
Logic 1 Output, 32kHz
I
I
I
A
CC
OH
OH
OH
(noncondensing) .............................................-40°C to +85°C
BAT
CC
= -40°C to +85°C, unless otherwise noted.) (Notes 2, 3)
.) (Notes 2, 3)
_____________________________________________________________________
= 2.0V to 5.5V, V
= -500µA
= -250µA
= -125µA
Leakage Current
= 2.0V to 5.5V, T
BAT
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
PARAMETER
PARAMETER
= 3.0V, and T
, SCLK, DIN
, SCLK, DIN,
CC
A
A
= -40°C to +85°C, unless otherwise noted.) (Notes 2 and 3)
= active supply (see Table 1), T
= +25°C, unless otherwise noted. TCXO operation guaranteed from 2.3V to 5.5V on V
SYMBOL
I
SYMBOL
CCSCONV
I
JC
BATLKG
V
V
I
V
I
V
V
BAT
CCA
V
CCS
) (Note 1) ........24°C/W
CC
JA
IH
OH
IL
PF
) (Note 1) ...55°C/W
2.0V
3.63V < V
SCLK = 4MHz, BSY = 0
(Notes 4, 5)
CS = V
SQW output off
(Note 5)
SPI bus inactive, 32kHz
output off, SQW output off
V
3.63V > V
2.7V > (V
(BB32kHz = 1)
CC
> 3.63V,
V
IH
CC
A
, 32kHz output off,
CC
CC
CC
= -40°C to +85°C, unless otherwise noted.) (Typical values are at V
3.63V
or V
> 2.7V,
5.5V
CONDITIONS
CONDITIONS
BAT )
Junction Temperature ......................................................+125°C
Storage Temperature Range ...............................-40°C to +85°C
Lead Temperature (soldering, 10s) .................................+260°C
Soldering Temperature (reflow, 2 times max) ....................+260°C
> 2.0V
(See the Handling, PC Board Layout, and Assembly section.)
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
= 3.63V
= 5.5V
= 3.63V
= 5.5V
= 3.63V
= 5.5V
0.85 x V
0.7 x
MIN
V
-0.3
-0.3
2.0
2.0
MIN
2.45
CC
CC
TYP
2.575
3.3
3.0
TYP
25
CC
and 2.3V to 3.8V on
+0.2 x
V
MAX
+0.7
V
MAX
5.5
3.8
CC
0.3
2.70
400
700
120
160
500
600
100
CC
+
UNITS
UNITS
µA
µA
µA
nA
V
V
V
V
V
CC
=