mt8880cpr1 Zarlink Semiconductor, mt8880cpr1 Datasheet - Page 15

• Manufacturer Part Number: mt8880cpr1
• Description: Integrated Dtmf Transceiver With Motorola Compatible Processor Interface
• Manufacturer: Zarlink Semiconductor

DTMF/CP
INPUT
DTMF
OUTPUT
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
= 10 k Ω (min.)
C1
R1
C4
R5
Figure 13 - Application Circuit (Single-Ended Input)
X-tal
R
R2
L
Zarlink Semiconductor Inc.
* Microprocessor based systems can inject undesirable noise into
the supply rails. The performance of the MT8880 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.
MT8880C
IN+
IN-
GS
VRef
VSS
OSC1
OSC2
TONE
R/W
CS
MT8880C
15
IRQ/CP
St/GT
VDD
RS0
ESt
D3
D2
D1
D0
Φ2
R3
C2
V
DD
R4
C3
Data Sheet
To µP
or µC