Specifications

CY14B256K
Document Number: 001-06431 Rev. *G Page 18 of 24
RTC Characteristics
Parameter Description Test Conditions Min Max Unit
I
BAK
[23]
RTC Backup Current Commercial 300 nA
Industrial 350 nA
V
RTCbat
[24]
RTC Battery Pin Voltage Commercial 1.8 3.3 V
Industrial 1.8 3.3 V
V
RTCcap
[25]
RTC Capacitor Pin Voltage Commercial 1.2 2.7 V
Industrial 1.2 2.7 V
tOCS RTC Oscillator Time to
Start
At Min Temperature from Power up or Enable Commercial 10 sec
At 25°C Temperature from Power up or Enable Commercial 5 sec
At Min Temperature from Power up or Enable Industrial 10 sec
At 25°C Temperature from Power up or Enable Industrial 5 sec
Switching Waveforms
Figure 5. SRAM Read Cycle 1: Address Controlled
[11, 12, 26]
Figure 6. SRAM Read Cycle 2: CE and OE Controlled
[11, 26]
Notes
23. From either V
RTCcap
or V
RTCbat.
24. Typical = 3.0V during normal operation.
25. Typical = 2.4V during normal operation.
26. HSB
must remain HIGH during READ and WRITE cycles.
t
RC
t
AA
t
OH
ADDRESS
DQ (DATA OUT)
DATA VALID
ADDRESS
t
RC
CE
t
ACE
t
LZCE
t
PD
t
HZCE
OE
t
DOE
t
LZOE
t
HZOE
DATA VALID
ACTIVE
STANDBY
t
PU
DQ (DATA OUT)
ICC
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