ISO7821 datasheet(13/39 Pages) TI1

13 / 39 page

ISO7821, ISO7821F

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SLLSEM2F – NOVEMBER 2014 – REVISED MARCH 2016

Product Folder Links: ISO7821 ISO7821F

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(1)

Also known as Pulse Skew.

(2)

tsk(pp) is the magnitude of the difference in propagation delay times between any terminals of different devices switching in the same

direction while operating at identical supply voltages, temperature, input signals and loads.

6.11 Switching Characteristics, 2.5 V

VCC1 = VCC2 = 2.5 V ± 10% (over recommended operating conditions unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH, tPHL

Propagation delay time

See Figure 7

7.5

11.7

17.5

PWD(1)

Pulse width distortion |tPHL – tPLH|

0.7

4.7

tsk(pp)

(2)

Part-to-part skew time

4.5

Output signal rise time

See Figure 7

1.8

3.5

Output signal fall time

1.8

3.5

tPHZ

Disable propagation delay, high-to-high impedance output for

ISO7821DWW and ISO7821FDWW

See Figure 8

tPLZ

Disable propagation delay, low-to-high impedance output for

ISO7821DWW and ISO7821FDWW

tPZH

Enable propagation delay, high impedance-to-high output for

ISO7821DWW

Enable propagation delay, high impedance-to-high output for

ISO7821FDWW

2.5

μs

tPZL

Enable propagation delay, high impedance-to-low output for

ISO7821DWW

2.5

μs

Enable propagation delay, high impedance-to-low output for

ISO7821FDWW

tfs

Default output delay time from input power loss

Measured from the time VCC goes

below 1.7 V. See Figure 9

0.2

μs

tie

Time interval error

216 - 1 PRBS data at 100 Mbps

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