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ISO7831, ISO7831F

SLLSEP8B – JULY 2015 – REVISED JUNE 2016

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(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.

6.15 Switching Characteristics—5-V Supply

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 13

6

11

16

ns

PWD

Pulse width distortion(1) |tPHL – tPLH|

0.55

4.1

ns

tsk(o)

Channel-to-channel output skew time(2)

Same-direction channels

2.5

ns

tsk(pp)

Part-to-part skew time(3)

4.5

ns

tr

Output signal rise time

See Figure 13

1.7

3.9

ns

tf

Output signal fall time

1.9

3.9

ns

tPHZ

Disable propagation delay, high-to-high impedance

output

See Figure 14

12

20

ns

tPLZ

Disable propagation delay, low-to-high impedance

output

12

20

ns

tPZH

Enable propagation delay, high impedance-to-high

output for ISO7831

10

20

ns

Enable propagation delay, high impedance-to-high

output for ISO7831F

2

2.5

μs

tPZL

Enable propagation delay, high impedance-to-low

output for ISO7831

2

2.5

μs

Enable propagation delay, high impedance-to-low

output for ISO7831F

10

20

ns

tDO

Default output delay time from input power loss

Measured from the time VCC goes

below 1.7 V. See Figure 15

0.2

9

μs

tie

Time interval error

216 – 1 PRBS data at 100 Mbps

0.90

ns

(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.

6.16 Switching Characteristics—3.3-V Supply

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

See Figure 13

6

10.8

16

ns

PWD

Pulse width distortion(1) |tPHL – tPLH|

0.7

4.2

ns

tsk(o)

Channel-to-channel output skew time(2)

Same-direction channels

2.2

ns

tsk(pp)

Part-to-part skew time(3)

4.5

ns

tr

Output signal rise time

See Figure 13

0.8

3

ns

tf

Output signal fall time

0.8

3

ns

tPHZ

Disable propagation delay, high-to-high impedance

output

See Figure 14

17

32

ns

tPLZ

Disable propagation delay, low-to-high impedance

output

17

32

ns

tPZH

Enable propagation delay, high impedance-to-high

output for ISO7831

17

32

ns

Enable propagation delay, high impedance-to-high

output for ISO7831F

2

2.5

μs

tPZL

Enable propagation delay, high impedance-to-low

output for ISO7831

2

2.5

μs

Enable propagation delay, high impedance-to-low

output for ISO7831F

17

32

ns

tDO

Default output delay time from input power loss

Measured from the time VCC goes

below 1.7 V. See Figure 15

0.2

9

μs

tie

Time interval error

216 – 1 PRBS data at 100 Mbps

0.91

ns