ISO7841 datasheet(10/31 Pages) TI

10 / 31 page

ISO7841, ISO7841F

SLLSEM3C – NOVEMBER 2014 – REVISED JULY 2015

www.ti.com

6.9 Switching Characteristics, 5 V

VCC1 = VCC2 = 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

PWD(1)

Pulse width distortion |tPHL – tPLH|

0.55

4.1

tsk(o)

(2)

Channel-to-channel output skew time

Same-direction channels

2.5

tsk(pp)

(3)

Part-to-part skew time

4.5

Output signal rise time

1.7

3.9

See Figure 7

Output signal fall time

1.9

3.9

tPHZ

Disable propagation delay, high-to-high impedance output

tPLZ

Disable propagation delay, low-to-high impedance output

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

ISO7841

tPZH

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

See Figure 8

2.5

μs

ISO7841F

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

2.5

μs

ISO7841

tPZL

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

ISO7841F

Measured from the time VCC

tfs

Default output delay time from input power loss

0.2

μs

goes below 1.7 V. See Figure 9

tie

Time interval error

0.90

216 – 1 PRBS data at 100 Mbps

(1)

Also known as pulse skew.

(2)

tsk(o) is the skew between outputs of a single device with all driving inputs connected together and the outputs switching in the same

direction while driving identical loads.

(3)

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.

6.10 Switching Characteristics, 3.3 V

VCC1 = VCC2 = 3.3 V ±10% (over recommended operating conditions unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH, tPHL

Propagation delay time

10.8

See Figure 7

PWD(1)

Pulse width distortion |tPHL – tPLH|

0.7

4.2

tsk(o)

(2)

Channel-to-channel output skew time

Same-direction channels

2.2

tsk(pp)

(3)

Part-to-part skew time

4.5

Output signal rise time

0.8

See Figure 7

Output signal fall time

0.8

Disable propagation delay, high-to-high impedance

tPHZ

output

Disable propagation delay, low-to-high impedance

tPLZ

output

Enable propagation delay, high impedance-to-high

output for ISO7841

tPZH

See Figure 8

Enable propagation delay, high impedance-to-high

2.5

μs

output for ISO7841F

Enable propagation delay, high impedance-to-low

2.5

μs

output for ISO7841

tPZL

Enable propagation delay, high impedance-to-low

output for ISO7841F

Measured from the time VCC goes

tfs

Default output delay time from input power loss

0.2

μs

below 1.7 V. See Figure 9

tie

Time interval error

0.91

216 – 1 PRBS data at 100 Mbps

(1)

Also known as Pulse Skew.

(2)

tsk(o) is the skew between outputs of a single device with all driving inputs connected together and the outputs switching in the same

direction while driving identical loads.

(3)

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.

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