參數(shù)資料
型號(hào): MT8888CE
廠商: Mitel Networks Corporation
英文描述: Integrated DTMFTransceiver with Intel Micro Interface
中文描述: 綜合DTMFTransceiver與英特爾微型接口
文件頁(yè)數(shù): 15/16頁(yè)
文件大?。?/td> 302K
代理商: MT8888CE
MT8888C/MT8888C-1
4-105
Characteristics are over recommended operating conditions unless otherwise stated
Typical figures are at 25°C, V
DD
=5V, and for design aid only: not guaranteed and not subject to production testing
NOTES: 1)
dBm=decibels above or below a reference power of 1 mW into a 600 ohm load.
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 ± 1.5%±2 Hz.
7)
Bandwidth limited (3 kHz) Gaussian noise.
8)
The precise dial tone frequencies are 350 and 440 Hz (±2%).
9)
Guaranteed by design and characterization. Not subject to production testing.
10)
Referenced to the lowest amplitude tone in the DTMF signal.
11)
For guard time calculation purposes.
AC Electrical Characteristics
- MPU Interface
- Voltages are with respect to ground (V
SS
), unless otherwise stated.
Characteristics
Sym
Min
Typ
Max
Units
Conditions
1
RD/WR clock frequency
f
CYC
t
CYC
4.0
MHz
Figure 16
2
RD/WR cycle period
250
ns
Figure 16
3
RD/WR rise and fall time
t
R,
t
F
t
AS
t
AH
t
DHR
t
DDR
t
PWL
t
PWH
t
DSW
t
DHW
C
IN
C
OUT
20
ns
Figure 16
4
Address setup time
23
ns
Figures 17 & 18
5
Address hold time
26
ns
Figures 17 & 18
6
Data hold time (read)
22
ns
Figures 17 & 18
7
RD to valid data delay (read)
100
ns
Figures 17 & 18
8
RD, WR pulse width low
150
ns
Figures 16, 17 & 18
9
RD, WR pulse width high
100
ns
Figures 16, 17 & 18
10
Data setup time (write)
45
ns
Figures 17 & 18
11
Data hold time (write)
10
ns
Figures 17 & 18
12
Input Capacitance (data bus)
5
pF
13
Output Capacitance (IRQ/CP)
5
pF
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