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LTC1694-1

16941fa

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

ORDER PART

NUMBER

LTC1694-1CS5

LTC1694-1IS5

(Note 1)

Supply Voltage (VCC) ................................................. 7V

SMBus1, SMBus2 Inputs ............ – 0.3V to (VCC + 0.3V)

Operating Ambient Temperature Range

LTC1694-1C ........................................... 0

°C to 70°C

LTC1694-1I ....................................... – 40

°C to 85°C

Junction Temperature ........................................... 125

°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec.)................. 300

°C

VCC 1

GND 2

NC 3

5 SMBus1

4 SMBus2

TOP VIEW

S5 PACKAGE

5-LEAD PLASTIC TSOT-23

TJMAX = 125°C, θJA = 256°C/ W

LTHE

LTA9

S5 PART MARKING

ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 6V, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

Supply Voltage Range

2.7

ICC

Supply Current

SMBus1 = SMBus2 = VCC

µA

IPULL-UP

Pull-Up Current

Positive Transition on SMBus ( Figure 1)

1.0

2.2

Slew Rate = 0.5V/

µs, SMBus > VTHRES

VTHRES

Input Threshold Voltage

Slew Rate = 0.5V/

µs (Figure 1)

0.4

0.65

0.9

SRTHRES

Slew Rate Detector Threshold

SMBus > VTHRES

0.2

0.5

µs

SMBus Rise Time

Bus Capacitance = 200pF (Note 2)

0.32

1.0

µs

Standard Mode I2C Bus Rise Time

Bus Capacitance = 400pF (Note 3)

0.30

1.0

µs

fMAX

SMBus Maximum Operating Frequency

(Note 4)

100

kHz

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

of a device may be impaired.

Note 2: The rise time of an SMBus line is calculated from (VIL(MAX) –

0.15V) to (VIH(MIN) + 0.15V) or 0.65V to 2.25V. This parameter is

guaranteed by design and not tested. With a minimum initial slew rate of

0.5V/

µs, a minimum pull-up current of 1mA and a maximum input

threshold voltage of 0.9V:

Rise Time = [(0.9V – 0.65V)/0.5V/

µs] + [(2.25V – 0.9V) • 200pF/1mA]

= 0.77

µs

Note 3: The rise time of an I2C bus line is calculated from VIL(MAX) to

VIH(MIN) or 1.5V to 3V (with VCC = 5V). This parameter is guaranteed by

design and not tested. With a minimum boosted pull-up current of 1mA:

Rise Time = (3V – 1.5V) • 400pF/1mA = 0.6

µs

Note 4: This parameter is guaranteed by design and not tested.

Consult LTC Marketing for parts specified with wider operating temperature ranges.

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