CY14C101I(2012) 查看數據表（PDF） - Cypress Semiconductor

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CY14C101I
(Rev.:2012)

1-Mbit (128 K × 8) Serial (I2C) nvSRAM with Real Time Clock

Cypress Semiconductor 

PRELIMINARY

CY14C101I

CY14B101I

CY14E101I

AC Test Loads and Waveforms

Figure 39. AC Test Loads and Waveforms

For 2.5 V (CY14C101I)

For 3.0 V (CY14B101I)

For 5.0 V (CY14E101I)

2.5 V

3.0 V

5.0 V

OUTPUT

700 

100 pF

OUTPUT

867 

100 pF

OUTPUT

1.6 K

50 pF

AC Test Conditions

Description

Input pulse levels

Input rise and fall times (10%–90%)

Input and output timing reference levels

CY14C101I

0 V to 2.5 V

10 ns

1.25 V

CY14B101I

0 V to 3 V

10 ns

1.5 V

RTC Characteristics

Over the Operating Range

Parameter

Description

Min

VRTCbat

IBAK[14]

RTC battery pin voltage

RTC backup current

1.8

TA (Min)

–

25 °C

–

VRTCcap[15]

RTC capacitor pin voltage

TA (Max)

–

TA (Min)

1.6

25 °C

1.5

TA (Max)

1.4

VBAKFAIL

Backup failure threshold

1.8

VDR

BPF flag retention voltage

1.6

tOCS

RTC oscillator time to start

–

tRTCp

RTC processing time from end of ‘W’ bit set to ‘0’

–

RBKCHG

RTC backup capacitor charge current-limiting resistor

350

CY14E101I

0 V to 5 V

10 ns

2.5 V

Typ

Max Units

–

3.6

V

–

0.45

µA

0.45

–

µA

–

0.60

µA

–

3.6

V

3.0

3.6

V

–

3.6

V

–

2

V

–

–

V

1

2

sec

–

1

ms

–

850



Notes

14. Current drawn from either VRTCcap or VRTCbat when VCC < VSWITCH.

15. If VRTCcap > 0.5 V or if no capacitor is connected to VRTCcap pin, the oscillator will start in tOCS time. If a backup capacitor is connected and VRTCcap < 0.5 V, the capacitor

must be allowed to charge to 0.5 V for oscillator to start.

Document Number: 001-54391 Rev. *G

Page 31 of 41

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