ML6680

6

AC CHARACTERISTICS

Over full range of operating conditions unless otherwise specified. (Note 1)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

CLOCK REFERENCE: XTAL1

Reference Clock Frequency

32.7

34.5

kHz

Reference Clock Duty Cycle

30

70

%

TWISTED PAIR RECEIVER: TPINP, TPINN

Input Pulse Width Threshold

550

1000

ns

Time to Unsquelch (Off to On)

2

5

µs

Time to Reject (On to Off)

550

1000

ns

OPTICAL RECEIVER: OPINP, OPINN

Input Pulse Width Threshold

V(INSERTED) > 0.7V

550

1000

ns

Time to Unsquelch (Off to On)

V(INSERTED) > 0.7V

3

9

µs

V(INSERTED) = 0V

0.8

1.2

µs

Time to Reject (On to Off)

V(INSERTED) > 0.7V

3

9

µs

V(INSERTED) = 0V

0.8

1.2

µs

PROPAGATION DELAYS STEADY STATE

TPINP-TPINN to OPOUT

20

ns

OPINP-OPINN to

30

ns

TPOUTP-TPOUTN

TPINP-TPINN to

30

ns

TPOUTP-TPOUTN

OPINP-OPINN to OPOUT

20

ns

INSERTION AND BYPASS KEY GENERATION (Fig. 1)

T_K1

Key Element #1

808

858

µs

T_K2

Key Element #2

1616

1717

µs

T_K3

Key Element #3

1616

µs

T_BYP

Bypass Element

4.85

26.5

ms

T_KINIT1

Time that phantom power

26.5

ms

should be applied in config 1

before generating the insertion

key.

T_KINIT4

Time that the optical input

26.5

ms

should be valid in config 4

V(PHTM1) = 0V, V(PHTM2) = 0V

before generating the insertion

key.

T_KOFF

Time that the optical input

V(KEYGEN) = VCC, V(TPINOK) = 0V

26.5

ms

should be invalid before

V(PHTM1) = 0V, V(PHTM2) = 0V

generating the bypass key.