MT8889CN Zarlink Semiconductor, Inc., MT8889CN Datasheet - Page 16

• Manufacturer Part Number: MT8889CN
• Description: Integrated DTMF Transceiver with Adaptive Micro Interface
• Manufacturer: Zarlink Semiconductor, Inc.

Notes:
R1, R2 = 100 k 1%
R3 = 374 k 1%
R4 = 3.3 k 10%
R5 = 4.7 M 10%
R
C1 = 100 nF 5%
C2 = 100 nF 5%
C3 = 100 nF 10%*
C4 = 10 nF 10%
X-tal = 3.579545 MHz
DTMF/CP
INPUT
DTMF
OUTPUT
L
= 10 k
TEST POINT
130 pF
(min.)
Test load for D0-D3 pins
C1
MMD6150 (or
equivalent)
R1
C4
24 k
Figure 15 - Application Circuit (Single-Ended Input)
R5
R
X-tal
R2
5.0 VDC
2.4 k
L
MMD7000 (or
equivalent)
* Microprocessor based systems can inject undesirable noise into the supply rails.
The performance of the MT8889C can be optimized by keeping
noise on the supply rails to a minimum. The decoupling capacitor (C3) should be
connected close to the device and ground loops should be avoided.
Figure 16 - Test Circuits
Zarlink Semiconductor Inc.
MT8889C
IN+
IN-
GS
VRef
VSS
OSC1
OSC2
TONE
R/W/WR
CS
16
MT8880C
TEST POINT
IRQ/CP
DS/RD
St/GT
VDD
RS0
ESt
D3
D2
D1
D0
R3
Test load for IRQ/CP pin
C2
V
DD
R4
C3
5.0 VDC
3 k
100 pF
Data Sheet
To P
or C