Cypress CY14B256K manual Maximum Ratings, Operating Range, DC Electrical Characteristics

Page 15

CY14B256K

Maximum Ratings

Exceeding maximum ratings may impair the useful life of the device. These user guidelines are not tested.

Storage Temperature

–65°C to +150°C

Ambient Temperature with

 

Power Applied

–55°C to +125°C

Supply Voltage on VCC Relative to GND

..........–0.5V to 4.1V

Voltage Applied to Outputs

–0.5V to VCC + 0.5V

in High Z State

Input Voltage

–0.5V to Vcc+0.5V

Transient Voltage (<20 ns) on

 

Any Pin to Ground Potential

–2.0V to VCC + 2.0V

Package Power Dissipation

 

Capability (TA = 25°C)

1.0W

Surface Mount Pb Soldering

 

Temperature (3 Seconds)

+260°C

DC Output Current (1 output at a time, 1s duration) ... 15 mA

Static Discharge Voltage

> 2001V

(MIL-STD-883, Method 3015)

 

Latch Up Current

...................................................

> 200 mA

Operating Range

 

 

 

 

 

Range

 

Ambient Temperature

VCC

Commercial

 

0°C to +70°C

2.7V to 3.6V

 

 

 

 

Industrial

 

–40°C to +85°C

2.7V to 3.6V

 

 

 

 

DC Electrical Characteristics

Over the Operating Range (VCC = 2.7V to 3.6V) [8, 9]

Parameter

Description

 

 

 

Test Conditions

 

Min

Max

Unit

ICC1

Average VCC Current

 

tRC = 25 ns

Commercial

 

65

mA

 

 

 

tRC = 35 ns

 

 

55

mA

 

 

 

tRC = 45 ns

 

 

50

 

 

 

 

Dependent on output loading and cycle rate.

 

 

 

 

 

 

 

Industrial

 

70

mA

 

 

 

Values obtained without output loads.

 

 

 

 

 

 

60

mA

 

 

 

IOUT = 0 mA.

 

 

 

 

 

 

 

55

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICC2

Average VCC Current

 

All Inputs Do Not Care, VCC = Max

 

 

3

mA

 

during STORE

 

Average current for duration tSTORE

 

 

 

 

ICC3

Average VCC Current

 

 

 

> (VCC – 0.2V). All other inputs cycling.

 

 

10

mA

 

WE

 

 

 

at tAVAV = 200 ns, 3V,

 

Dependent on output loading and cycle rate.

 

 

 

 

 

25°C Typical

 

Values obtained without output loads.

 

 

 

 

ICC4

Average VCAP

 

All Inputs Do Not Care, VCC = Max

 

 

3

mA

 

Current during

 

Average current for duration tSTORE

 

 

 

 

 

AutoStore Cycle

 

 

 

 

 

 

 

 

 

 

 

 

ISB

VCC Standby Current

 

 

> (VCC – 0.2V). All others VIN < 0.2V or > (VCC – 0.2V).

 

3

mA

 

WE

 

 

 

Standby current level after nonvolatile cycle is complete.

 

 

 

 

 

 

Inputs are static. f = 0 MHz.

 

 

 

 

 

 

 

 

 

 

 

 

IIX

Input Leakage

 

VCC = Max, VSS < VIN < VCC

 

-1

+1

μA

 

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IOZ

Off State Output

 

VCC = Max, VSS < VIN < VCC,

 

or

 

> VIH

 

-1

+1

μA

 

CE

OE

 

Leakage Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIH

Input HIGH Voltage

 

 

 

 

 

 

 

 

 

2.0

VCC + 0.5

V

VIL

Input LOW Voltage

 

 

 

 

 

 

 

 

 

VSS – 0.5

0.8

V

VOH

Output HIGH Voltage

 

IOUT = –2 mA

 

2.4

 

V

VOL

Output LOW Voltage

 

IOUT = 4 mA

 

 

0.4

V

VCAP

Storage Capacitor

Between VCAP pin and VSS, 5V Rated

 

17

120

μF

Notes

8.The HSB pin has IOUT = –10 μA for VOH of 2.4V, this parameter is characterized but not tested.

9.The INT pin is open drain and does not source or sink current when Interrupt register bit D3 is low.

Document Number: 001-06431 Rev. *H

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Contents Cypress Semiconductor Corporation 198 Champion Court FeaturesLogic Block Diagram Functional DescriptionPin Definitions Pin ConfigurationsDevice Operation AutoStore OperationHardware Store HSB Operation Data Protection Hardware Recall Power UpSoftware Store Software RecallCurrent versus Cycle Time Low Average Active Power Best PracticesMode Selection A13-A0 Power Real Time Clock Operation Alarm Watchdog TimerCalibrating the Clock Flags Register Power MonitorInterrupts Interrupt RegisterInterrupt Block Diagram WDF Oscf RTC Register Map5 BCD Format Data Function/RangeTime Keeping Minutes 0x7FFA Register Map Detail Time Keeping Years 0x7FFF 10s YearsTime Keeping Months 0x7FFE 10s Month Date Time Keeping Hours 0x7FFBInterrupt Status/Control 0x7FF6 Alarm Day 0x7FF5Register Map Detail Calibration/Control 0X7FF8 0x7FF7When the Flags register is read or on power-up Register Map Detail Alarm Hours 0x7FF4 10s Alarm HoursTo ignore the hours value Alarm Minutes 0x7FF3 Alarm Seconds 0x7FF2Range DC Electrical CharacteristicsMaximum Ratings Operating RangeAC Test Conditions Data Retention and EnduranceCapacitance Thermal ResistanceParameter Sram Read Cycle AC Switching CharacteristicsDescription 25 ns 35 ns 45 ns Min Max Unit Sram Write Cycle Parameter Cypress AltParameter Description CY14B256K Unit Min Max AutoStore or Power Up RecallParameter Alt Description 25 ns 35 ns 45 ns Unit Min Max Software Controlled STORE/RECALL Cycles 20Hardware Store Cycle Soft Sequence CommandsRTC Characteristics Inputs and Outputs Mode PowerTruth Table For Sram Operations Part Numbering Nomenclature CY 14 B 256 K SP 25 X C T Ordering Information Pin Shrunk Small Outline Package Package DiagramsOrig. of Change Submission Description of Change Date Document HistoryAdded default values to RTC Register Map table Updated Features sectionUpdated Reading the clock, Backup Power, Stopping Starting the Oscillator and Alarm descriptions under RTCSales, Solutions, and Legal Information Worldwide Sales and Design Support Products PSoC SolutionsUSB
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