mt8885an1 Zarlink Semiconductor, mt8885an1 Datasheet - Page 22

• Manufacturer Part Number: mt8885an1
• Description: Integrated Dtmf Transceiver With Power-down And Adaptive Micro Interface
• Manufacturer: Zarlink Semiconductor

AC Electrical Characteristics
† 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.
10
11
12
13
14
8
9
*V
HM
Data hold time (read)
DS/RD to valid data delay (read)
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
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
= 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
Characteristics
LM
= 0.3V
°
C, V
DD
DD
=5 V, and for design aid only: not guaranteed and not subject to production testing
†
- MPU Interface
Figure 15 - Digital Signal Input Rise/Fall Times
±
1.5%
±
2 Hz.
t
RDS,
Sym.
t
t
t
t
t
t
DSW
DHW
Zarlink Semiconductor Inc.
DHR
DDR
CSS
CSH
t
R
t
DSS
- Voltages are with respect to ground (V
MT8885
CL
Min.
22
22
45
10
45
40
20
±
+ t
2%).
CH
≥ 1000 ns
Typ.
t
F
‡
Max.
100
Units
SS
ns
ns
ns
ns
ns
ns
ns
), unless otherwise stated.
Figures 16 - 17
Figures 16 - 17
Figures 16, 18
Figures 16, 18
Figures 16 - 18
Figures 16 - 18
Figures 16, 17
Conditions
Data Sheet
V
V
HM
LM