CY14B256KA(2009) 데이터 시트보기 (PDF) - Cypress Semiconductor
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CY14B256KA Datasheet PDF : 26 Pages
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CY14B256KA
Data Retention and Endurance
Parameter
DATAR
NVC
Description
Data Retention
Nonvolatile STORE Operations
Capacitance
Parameter[9]
CIN
COUT
Description
Input Capacitance
Output Capacitance
Test Conditions
TA = 25°C, f = 1 MHz,
VCC = VCC (Typ)
Thermal Resistance
Parameter[9]
ΘJA
ΘJC
Description
Thermal Resistance
(Junction to Ambient)
Thermal Resistance
(Junction to Case)
Test Conditions
Test conditions follow standard test methods
and procedures for measuring thermal
impedance, in accordance with EIA/JESD51.
3.0V
OUTPUT
30 pF
577Ω
R1
Figure 6. AC Test Loads
R2
789Ω
3.0V
OUTPUT
5 pF
Min
20
1,000
Max
7
7
48 SSOP
37.47
24.71
577Ω
R1
Unit
Years
K
Unit
pF
pF
Unit
°C/W
°C/W
R2
789Ω
AC Test Conditions
Input Pulse Levels ....................................................0V to 3V
Input Rise and Fall Times (10% - 90%) ........................ <3 ns
Input and Output Timing Reference Levels .................... 1.5V
RTC Characteristics
Parameters
VRTCbat
IBAK[10]
Description
RTC Battery Pin Voltage
RTC Backup Current
VRTCcap[11]
RTC Capacitor Pin Voltage
tOCS
RBKCHG
RTC Oscillator Time to Start
RTC Backup Capacitor Charge Current-Limiting
Resistor
Min
Typ[7]
Max
Units
1.8
3.0
3.6
V
TA (Min)
25°C
0.35
µA
0.35
µA
TA (Max)
0.5
µA
TA (Min) 1.6
3.6
V
25°C
1.5
3.0
3.6
V
TA (Max) 1.4
3.6
V
1
2
sec
350
850
Ω
Notes
9. These parameters are guaranteed by design and are not tested.
10. From either VRTCcap or VRTCbat.
11. If VRTCcap > 0.5V or if no capacitor is connected to VRTCcap pin, the oscillator starts in tOCS time. If a backup capacitor is connected and VRTCcap < 0.5V, the capacitor
must be allowed to charge to 0.5V for oscillator to start.
Document #: 001-55720 Rev. *A
Page 17 of 26
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