mt88l89asr1 Zarlink Semiconductor, mt88l89asr1 Datasheet - Page 22

• Manufacturer Part Number: mt88l89asr1
• Description: 3 V Integrated Dtmf Transceiver With Adaptive Micro Interface
• Manufacturer: Zarlink Semiconductor

† Characteristics are over recommended operating conditions unless otherwise stated
‡ Typical figures are at 25°C, V
NOTES: 1) dBm = decibels above or below a reference power of 1 mW into a 600 ohm load
AC Electrical Characteristics
10
12
13
14
11
*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
Data setup time (write)
Data hold time (write)
Chip select setup time
Chip select hold time
DS/RD set up time prior to CS
assertion
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
Characteristics
LM
= 0.3V
DD
DD
= 3 V, and for design aid only: not guaranteed and not subject to production testing
†
- MPU Interface
Figure 16 - Digital Signal Input Rise/Fall Times
±
1.5%
±
2 Hz
t
RDS,
Sym.
t
t
Zarlink Semiconductor Inc.
t
t
DHW
t
DSW
CSS
CSH
R
t
DSS
- Voltages are with respect to ground (V
MT88L89
CL
22
Min.
60
10
45
10
20
±
+ t
2%)
CH
≥ 1000 ns
Typ.
t
F
‡
Max.
Units
SS
ns
ns
ns
ns
ns
), unless otherwise stated.
Figures 17, 19
Figures 17, 19
Figures 17 - 19
Figures 17 - 19
Figures 17, 19
Conditions
Data Sheet
V
V
HM
LM