DS3234S# Maxim Integrated Products, DS3234S# Datasheet - Page 5

• 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

WARNING: Negative undershoots below -0.3V while the part is in battery-backed mode may
cause loss of data.
Note 2: Limits at -40°C are guaranteed by design and not production tested.
Note 3: All voltages are referenced to ground.
Note 4: Measured at V
Note 5: Current is the averaged input current, which includes the temperature conversion current. CRATE1 = CRATE0 = 0.
Note 6: The RST pin has an internal 50kΩ (nominal) pullup resistor to V
Note 7: Measured at V
Note 8: With 50pF load.
Note 9: The parameter t
Note 10: This delay only applies if the oscillator is enabled and running. If the EOSC bit is 1, t
Note 11: Guaranteed by design and not production tested.
0V ≤ V
goes high.
V
RST
V
PF(MAX)
PF(MIN)
V
CC
CC
≤ V
RST
CC(MAX)
IH
OH
OSF
= 0.8 x V
Extremely Accurate SPI Bus RTC with
= 0.8 x V
is the period of time the oscillator must be stopped for the OSF flag to be set over the voltage range of
and 2.3V ≤ V
t
VCCF
CC
CC
or V
or V
IL
_____________________________________________________________________
V
OL
BAT
PF
PB
= 0.2 x V
DB
= 0.2 x V
≤ V
BAT(MAX)
Integrated Crystal and SRAM
CC
CC
, 10ns rise/fall time, DOUT = no load.
. Measured from the 50% point of SCLK to the V
.
CC
.
t
RST
Pushbutton Reset Timing
REC
V
Power-Switch Timing
PF
is bypassed and RST immediately
t
t
VCCR
REC
OH
minimum of DOUT.
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