T48C893 datasheet(79/82 Pages) ATMEL

79 / 82 page

T48C893

Rev. A4, 22-Jan-02

79 (82)

Unit

Max.

Typ.

Min.

Symbol

Test Conditions / Pins

Parameters

32-kHz crystal oscillator (operating range VDD = 2.0 V to 6.5 V)

Frequency

32.768

kHz

Start-up time

tSQ

0.5

Stability

∆f/f

–10

ppm

Integrated input / output

capacitances

(mask programmable)

CIN / COUT programmable

CIN

COUT

0, 2, 5, 7, 10 or 12

External 32-kHz crystal parameters

Crystal frequency

32.768

kHz

Serial resistance

Ω

Static capacitance

1.5

Dynamic capacitance

External 4-MHz crystal parameters

Crystal frequency

4.0

MHz

Serial resistance

150

Ω

Static capacitance

1.4

Dynamic capacitance

Crystal Characteristics

OSCIN

OSCOUT

Equivalent

circuit

96 11553

SCLIN

SCLOUT

Figure 88. Crystal equivalent circuit

Supply voltage VDD = 1.8 to 6.5 V, VSS = 0 V, Tamb = 25

°C unless otherwise specified.

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

Data EEPROM

Operating current during

erase/write cycle

IWR

600

1300

µA

Endurance

Erase- / write-cycles

Tamb = 85

°C

nEW

500,000

100,000

1,000,000

Cycles

Data erase/write cycle time

for 16-bit access

tDEW

Data retention time

Tamb = 85

°C

tDR

100

Years

Power-up to read operation

tPUR

0.2

Power-up to write opera-

tion

tPUW

0.2

Program EEPROM

Erase- / write-cycles

Tamb = 0 to 40

°C

nEW

100

1,000

cycles

Serial interface

SCL clock frequency

fSC_MCL

100

500

kHz

T48C893 Datasheet(PDF) 79 Page - ATMEL Corporation

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