MT8889CN View Datasheet(PDF) - Mitel Networks
Part Name
Description
Manufacturer
MT8889CN Datasheet PDF : 18 Pages
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MT8889C/MT8889C-1
AC Electrical Characteristics†- MPU Interface - Voltages are with respect to ground (VSS), unless otherwise stated.
Characteristics
Sym Min Typ‡ Max Units
Conditions
1 DS/RD/WR clock frequency
fCYC
4.0
MHz Figure 16
2 DS/RD/WR cycle period
tCYC
250
ns Figure 16
3 DS/RD/WR low pulse width
tCL
150
ns Figure 16
4 DS/RD/WR high pulse width
tCH
100
ns Figure 16
5 DS/RD/WR rise and fall time
tR,tF
20
ns Figure 16
6 R/W setup time
tRWS
23
ns Figures 17 & 18
7 R/W hold time
tRWH
20
ns Figures 17 & 18
8 Address setup time (RS0)
tAS
0
ns Figures 17 - 20
9 Address hold time (RS0)
tAH
40
20
ns Figures 17 - 20
10 Data hold time (read)
tDHR
22
ns Figures 17 - 20
11 DS/RD to valid data delay (read)
tDDR
100 ns Figures 17 - 20
12 Data setup time (write)
tDSW
45
ns Figures 17 - 20
13 Data hold time (write)
tDHW
10
ns Figures 17 - 20
14 Chip select setup time
tCSS
45
35
ns Figures 17 - 20
15 Chip select hold time
tCSH
40
ns Figures 17 - 20
16 Input Capacitance (data bus)
CIN
5
pF
17 Output Capacitance (IRQ/CP)
COUT
5
pF
† Characteristics are over recommended operating conditions unless otherwise stated
‡ Typical figures are at 25°C, VDD=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.
DS/RD/WR
4-122
tCYC
tR
tF
tCH
tCL
Figure 16 - DS/RD/WR Clock Pulse
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