Cypress CY14B256K manual Data Retention and Endurance, Capacitance, Thermal Resistance

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					CY14B256K

Data Retention and Endurance

Parameter			Description	Min		Unit
DATAR			Data Retention	20		Years
NVC			Nonvolatile STORE Operations	200		K

Capacitance

These parameters are guaranteed but not tested.

	Parameter	Description	Test Conditions	Max	Unit
	CIN	Input Capacitance	TA = 25°C, f = 1 MHz,	7	pF
			VCC = 0 to 3.0 V
	COUT	Output Capacitance	VCC = 0 to 3.0 V	7	pF
	COUT	Output Capacitance		7	pF

Thermal Resistance

These parameters are guaranteed but not tested.

	Parameter	Description	Test Conditions	48-SSOP	Unit
	ΘJA	Thermal Resistance	Test conditions follow standard test methods and	32.9	°C/W
		(Junction to Ambient)	procedures for measuring thermal impedance, in
			accordance with EIA / JESD51.
	ΘJC	Thermal Resistance	accordance with EIA / JESD51.	25.56	°C/W
	ΘJC	Thermal Resistance		25.56	°C/W
		(Junction to Case)

			Figure 7. AC Test Loads

R1 577Ω

3.0V

Output

30 pF

R1 577Ω

3.0V

Output

R2	5 pF

789Ω

For Tri-state Specs

R2

789Ω

AC Test Conditions

Input Pulse Levels	0 V to 3	V
Input Rise and Fall Times (10% - 90%)	<5 ns
Input and Output Timing Reference Levels	1.5	V

Document Number: 001-06431 Rev. *H

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Contents Features Logic Block DiagramFunctional Description Cypress Semiconductor Corporation 198 Champion CourtPin Configurations Pin DefinitionsAutoStore Operation Device OperationHardware Store HSB Operation Hardware Recall Power Up Software StoreSoftware Recall Data ProtectionLow Average Active Power Best Practices Current versus Cycle TimeMode Selection A13-A0 Power Real Time Clock Operation Watchdog Timer AlarmCalibrating the Clock Power Monitor InterruptsInterrupt Register Flags RegisterInterrupt Block Diagram RTC Register Map5 BCD Format Data Function/Range WDF OscfRegister Map Detail Time Keeping Years 0x7FFF 10s Years Time Keeping Months 0x7FFE 10s MonthDate Time Keeping Hours 0x7FFB Time Keeping Minutes 0x7FFAAlarm Day 0x7FF5 Register Map Detail Calibration/Control 0X7FF80x7FF7 Interrupt Status/Control 0x7FF6Register Map Detail Alarm Hours 0x7FF4 10s Alarm Hours To ignore the hours value Alarm Minutes 0x7FF3Alarm Seconds 0x7FF2 When the Flags register is read or on power-upDC Electrical Characteristics Maximum RatingsOperating Range RangeData Retention and Endurance CapacitanceThermal Resistance AC Test ConditionsAC Switching Characteristics Parameter Sram Read CycleParameter Cypress Alt Description 25 ns 35 ns 45 ns Min Max Unit Sram Write CycleAutoStore or Power Up Recall Parameter Description CY14B256K Unit Min MaxSoftware Controlled STORE/RECALL Cycles 20 Parameter Alt Description 25 ns 35 ns 45 ns Unit Min MaxSoft Sequence Commands Hardware Store CycleInputs and Outputs Mode Power RTC CharacteristicsTruth Table For Sram Operations Part Numbering Nomenclature CY 14 B 256 K SP 25 X C T Ordering Information Package Diagrams Pin Shrunk Small Outline PackageDocument History Orig. of Change Submission Description of Change DateUpdated Features section Updated Reading the clock, Backup Power, StoppingStarting the Oscillator and Alarm descriptions under RTC Added default values to RTC Register Map tableWorldwide Sales and Design Support Products PSoC Solutions Sales, Solutions, and Legal InformationUSB