PCA9517 datasheet(8/13 Pages) PHILIPS

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Philips Semiconductors

Product data sheet

PCA9517

Level translating I2C-bus repeater

2004 Oct 05

AC ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

TEST CONDITIONS

LIMITS

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

tPLH

Propagation delay, B to A side

Waveform 3; Note 3

100

170

250

tPHL

Propagation delay, B to A side

VCCA ≤ 2.7 V; Waveform 1

80 7

110

VCCA ≥ 3 V; Waveform 1

300

tTLH

Transition time, A side

Waveform 2

tTHL

Transition time, A side

VCCA ≤ 2.7 V; Waveform 2

77 7

105

VCCA ≥ 3 V; Waveform 2

175

tPLH

Propagation delay, A to B side

Waveform 2; Note 2

110

tPHL

Propagation delay, A to B side

Waveform 2; Note 2

230

tTLH

Transition time, B side

Waveform 1

120

140

170

tTHL

Transition time, B side

Waveform 1

tSET

Enable HIGH before Start condition

Note 6

100

–

tHOLD

Enable HIGH after Stop condition

Note 6

100

–

NOTES:

1. Times are specified with loads of 1.35 k

Ω pull-up resistance and 57 pF load capacitance on the B side and 167 Ω pull-up and 57 pF load

capacitance on the A side. Different load resistnace and capacitance will alter the RC time constant, thereby changing the propagation delay

and transition times.

2. The proportional delay data from A to B side is measured at 0.3VCCA on the A side to 1.5 V on the B side.

3. The tPLH delay data from B to A side is measured at 0.5 V on the B side to 0.5VCCA on the A side when VCCA is less than 2 V, and 1.5 V on

the A side if VCCA is greater than 2 V.

4. Pull-up voltages are VCCA on the A side and VCCB on the B side.

5. Typical values were measured with VCCA = 3.6 V at Tamb = 25 °C, unless otherwise noted.

6. The enable pin, EN, should only change state when the global bus and the repeater port are in an idle state.

7. Typical value measured with VCCA = 2.7 V at Tamb = 25 °C.

AC WAVEFORMS

3.3 V

0.1 V

1.5 V

INPUT

OUTPUT

1.2 V

VOL

tPHL

tPLH

80%

20%

0.6 V

80%

20%

tTHL

tTLH

SW02169

Waveform 1.

0.3VCCA

INPUT

OUTPUT

3.3 V

80%

20%

1.5 V

80%

20%

SW02170

0.3VCCA

VCCA

Waveform 2.

tPLH

50 % if VCCA is less than 2 V

1.5 V if VCCA is greater than 2 V

0.5 V

INPUT

SDAB, SCLB

OUTPUT

SCLA, SDAA

SW02341

Waveform 3.

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