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LTC4557

4557f

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VBATT = 3.3V, DVCC = 1.8V, unless otherwise specified.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

I/OA, I/OB

VOL

Low Level Output Voltage

Sink Current = –1mA (VDATA = 0V) (Note 2)

0.3

VOH

High Level Output Voltage

Source Current = 20

µA (VDATA = VDVCC)

0.85 •

(Note 2)

VCCA,B

Rise Time

Loaded with 33pF (10% to 90%) (Note 2)

200

500

Short-Circuit Current

VDATA = 0V (Note 2)

510

DATA

VOL

Low Level Output Voltage

Sink Current = –500

µA (VI/OA,B = 0V)

0.3

VOH

High Level Output Voltage

Source Current = 20

µA (VI/OA,B = VCCA,B)

0.8 •

DVCC

Rise Time

Loaded with 33pF (10% to 90%)

200

500

RSTIN, CLKIN, ENABLE, M0, M1

VIL

Low Input Threshold

0.15 •

DVCC

VIH

High Input Threshold

0.85 •

DVCC

Input Current (IIH, IIL)

–1

µA

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: This specification applies to both 1.8V and 3V smart cards.

Note 3: The LTC4557E is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 4: Based on long term current density limitations.

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