MT8888CPR1 Zarlink Semiconductor, Inc., MT8888CPR1 Datasheet - Page 15

• Manufacturer Part Number: MT8888CPR1
• Description: Integrated DTMF Transceiver with Intel Micro Interface
• Manufacturer: Zarlink Semiconductor, Inc.

Notes:
R1, R2 = 100 kΩ 1%
R3 = 374 kΩ 1%
R4 = 3.3 kΩ 10%
R5 = 4.7 MΩ 10%
R
C1 = 100 nF 5%
C2 = 100 nF 5%
C3 = 100 nF 10%*
C4 = 10 nF 10%
X-tal = 3.579545 MHz
L
DTMF/CP
INPUT
= 10 k Ω (min.)
DTMF
OUTPUT
C1
Figure 14 - MT8888C Interface Connections for Various Intel Micros
R1
C4
R5
Figure 15 - Application Circuit (Single-Ended Input)
8031/8051
8080/8085
R
X-tal
R2
L
A8-A15
WR
PO
RD
* Microprocessor based systems can inject undesirable noise into the supply rails.
The performance of the MT8888C 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.
Zarlink Semiconductor Inc.
A8
MT8888C
IN+
IN-
GS
VRef
VSS
OSC1
OSC2
TONE
WR
CS
MT8880C
15
IRQ/CP
St/GT
VDD
RS0
ESt
RD
D3
D2
D1
D0
CS
RS0
D0-D3
RD
WR
MT8888C
R3
C2
V
DD
R4
C3
Data Sheet
To µP
or µC