DS3234(2006) 查看數據表（PDF） - Maxim Integrated

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DS3234
(Rev.:2006)

Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM

Maxim Integrated 

Extremely Accurate SPI Bus RTC with

Integrated Crystal and SRAM

ABSOLUTE MAXIMUM RATINGS

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

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.

RECOMMENDED DC OPERATING CONDITIONS

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

PARAMETER

Supply Voltage

SYMBOL

VCC

VBAT

CONDITIONS

Logic 1 Input CS, SCLK, DIN

VIH

Logic 0 Input CS, SCLK, DIN,

RST

Pullup Voltage INT/SQW

VIL

2.0V ≤ VCC ≤ 3.63V

3.63V < VCC ≤ 5.5V

VPU

VCC = 0V

MIN

2.0

2.0

0.7 x

VCC

-0.3

-0.3

TYP MAX UNITS

3.3

5.5

V

3.0

3.8

VCC +

V

0.3

+0.2 x

VCC

V

+0.7

5.5

V

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

Active Supply Current

Standby Supply Current

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

ICCA

SCLK = 4MHz, BSY = 0

(Notes 3, 4)

VCC = 3.63V

VCC = 5.5V

400

µA

700

ICCS

CS = VIH, 32kHz output off,

SQW output off

(Note 4)

VCC = 3.63V

VCC = 5.5V

120

µA

160

Temperature Conversion Current

ICCSCONV

SPI bus inactive, 32kHz

output off, SQW output off

VCC = 3.63V

VCC = 5.5V

500

µA

600

Power-Fail Voltage

VPF

2.45 2.575 2.70

V

VBAT Leakage Current

IBATLKG

25

100

nA

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

Logic 1 Output, 32kHz

VCC > 3.63V,

IOH = -500µA

IOH = -250µA

VOH

3.63V > VCC > 2.7V,

2.7V > (VCC or VBAT) > 2.0V

0.85 x VCC

V

IOH = -125µA

(BB32kHz = 1)

2 _____________________________________________________________________

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