DS3234S# Maxim Integrated Products, DS3234S# Datasheet - Page 21

• 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

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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 21
© 2010 Maxim Integrated Products
REVISION
NUMBER
0
1
2
3
is a registered trademark of Maxim Integrated Products, Inc.
REVISION
DATE
10/08
2/06
7/07
7/10
Extremely Accurate SPI Bus RTC with
Initial release
Clarified the behavior of t
Description
Corrected the POR for the BB32kHz bit from 0 to 1
Updated the Typical Operating Circuit
Removed the V
table and added verbiage about the pullup to the Pin Description table for
INT/SQW
In the Electrical Characteristics table, added CRATE1 = CRATE0 = 0 to the I
parameter and changed the symbols for Timekeeping Battery Current,
Temperature Conversion Current, and Data-Retention Current from I
I
In the AC Electrical Characteristics, changed the t
(max) to 400ns (min)
Added the Delta Time and Frequency vs. Temperature graph in the Typical
Operating Characteristics section
Updated the Block Diagram
Added the V
Pushbutton Reset Function, Aging Offset Register (10h/90h), and Temperature
Registers (11h–12h) sections
Corrected the description of when the countdown chain is reset in the Clock and
Calendar section
In the Absolute Maximum Ratings section, added the theta-JA and theta-JC
thermal resistances and Note 1, and changed the soldering temperature to
+260°C; changed the 10-hour bit to 20-hour bit in the Clock and Calendar section
and Table 1; updated the BBSQW bit description in the Control Register
(0Eh/8Eh) section; added the land pattern no. to the Package Information table
BATTC
to I
BATT
BAT
PU
, I
Operation section, improved some sections of text for the
BATTC
parameter from the Recommended DC Operating Conditions
, and I
Integrated Crystal and SRAM
REC
on initial power-up in the RST description of the Pin
BATTDR
DESCRIPTION
, respectively
Maxim is a registered trademark of Maxim Integrated Products, Inc.
CWH
specification from 400ns
BAT
, I
TC
Revision History
, and
BATT
2–5, 8, 11, 12,
CHANGED
PAGES
10, 16
14, 20
2, 8
15
11
—
8
1
3
4
7
9