DS3234SN- datasheet(2/21 Pages) MAXIM

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Extremely Accurate SPI Bus RTC with

Integrated Crystal and SRAM

_____________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

(TA = -40°C to +85°C, unless otherwise noted.) (Notes 1, 2)

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.

Voltage Range on Any Pin Relative to Ground......-0.3V to +6.0V

Operating Temperature Range

(noncondensing) .............................................-40°C to +85°C

Junction Temperature ......................................................+125°C

Storage Temperature Range ...............................-40°C to +85°C

Soldering Temperature

(leads, 10s) ...........................................................+260°C/10s

Soldering Temperature (reflow, 2 times max) .......See IPC/JEDEC

J-STD-020 Specification

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

2.0

3.3

5.5

Supply Voltage

VBAT

2.0

3.0

3.8

Logic 1 Input

CS, SCLK, DIN

VIH

0.7 x

VCC

VCC +

0.3

2.0V

VCC

3.63V

-0.3

+0.2 x

VCC

Logic 0 Input

CS, SCLK, DIN,

RST

VIL

3.63V < VCC

5.5V

-0.3

+0.7

ELECTRICAL CHARACTERISTICS

(VCC = 2.0V to 5.5V, VCC = active supply (see Table 1), TA = -40°C to +85°C, unless otherwise noted.) (Typical values are at VCC =

3.3V, VBAT = 3.0V, and TA = +25°C, unless otherwise noted. TCXO operation guaranteed from 2.3V to 5.5V on VCC and 2.3V to 3.8V on

VBAT.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCC = 3.63V

400

Active Supply Current

ICCA

SCLK = 4MHz, BSY = 0

(Notes 3, 4)

VCC = 5.5V

700

µA

VCC = 3.63V

120

Standby Supply Current

ICCS

CS = VIH, 32kHz output off,

SQW output off

(Note 4)

VCC = 5.5V

160

µA

VCC = 3.63V

500

Temperature Conversion Current

ICCSCONV

SPI bus inactive, 32kHz

output off, SQW output off

VCC = 5.5V

600

µA

Power-Fail Voltage

VPF

2.45

2.575

2.70

VBAT Leakage Current

IBATLKG

100

(VCC = 2.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Notes 1 and 2)

Logic 1 Output, 32kHz

IOH = -500µA

IOH = -250µA

IOH = -125µA

VOH

VCC > 3.63V,

3.63V > VCC > 2.7V,

2.7V > (VCC or VBAT) > 2.0V

(BB32kHz = 1)

0.85 x VCC

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