mt88l85anr1 Zarlink Semiconductor, mt88l85anr1 Datasheet - Page 23

• Manufacturer Part Number: mt88l85anr1
• Description: 3 V Integrated Dtmf Transceiver With Power-down And Adaptive Micro Interface
• Manufacturer: Zarlink Semiconductor

† Characteristics are over recommended operating conditions unless otherwise stated
‡ Typical figures are at 25
NOTES: 1) dBm=decibels above or below a reference power of 1 mW into a 600 ohm load
*V
HM
10) Referenced to the lowest amplitude tone in the DTMF signal
11) For guard time calculation purposes
12) Operation of microprocessor interface requires that t
13) For Unity Gain Configuration
= 0.7V
2) Digit sequence consists of all 16 DTMF tones
3) Tone duration=40 ms. Tone pause=40 ms
4) Nominal DTMF frequencies are used
5) Both tones in the composite signal have an equal amplitude
6) The tone pair is deviated by
7) Bandwidth limited (3 kHz) Gaussian noise
8) The precise dial tone frequencies are 350 and 440 Hz (
9) Guaranteed by design and characterization. Not subject to production testing
All Digital Inputs
DD
, V
LM
= 0.3V
°
C, V
DD
DD
=3V, and for design aid only: not guaranteed and not subject to production testing
Figure 16 - Digital Signal Input Rise/Fall Times
±
1.5%
±
2 Hz
Zarlink Semiconductor Inc.
t
R
MT88L85
CL
23
±
+ t
2%)
CH
Š 1000ns
t
F
Data Sheet
V
V
HM
LM