MT88L70

Data Sheet

11

Zarlink Semiconductor Inc.

‡ Typical figures are at 25

*NOTES:

1. Used for guard-time calculation purposes only and tested at -4 dBm.

2. These, user adjustable parameters, are not device specifications. The adjustable settings of these minimums and maximums are

recommendations based upon network requirements.

Characteristics

Sym.

Min.

Max.

Units

Conditions

1

T

I

M

I

N

G

Tone present detect time

511

14

ms

Note 1

2

Tone absent detect time

0.548.5

ms

Note 1

3

Tone duration accept

40

ms

Note 2

4

Tone duration reject

20

ms

Note 2

5

Interdigit pause accept

40

ms

Note 2

6

Interdigit pause reject

20

ms

Note 2

7

O

U

T

P

U

T

S

Propagation delay (St to Q)

11

8

Propagation delay (St to StD)

20

µs

9

Output data set up (Q to StD)

5.0

µs

10

Propagation delay (TOE to Q ENABLE)

50

ns

load of 10 k

Ω,

50 pF

11

Propagation delay (TOE to Q DISABLE)

130

ns

load of 10 k

Ω,

50 pF

12

P

D

W

N

Power-up time

30

ms

Note 3

13

Power-down time

20

ms

14

C

L

O

C

K

Crystal/clock frequency

3.5759 3.5795 3.5831

MHz

15

Clock input rise time

110

ns

Ext. clock

16

Clock input fall time

110

ns

Ext. clock

17

Clock input duty cycle

40

50

60

%

Ext. clock

18

Capacitive load (OSC2)

15

pF