73K222BL-IH 데이터 시트보기 (PDF) - TDK Corporation
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73K222BL-IH Datasheet PDF : 26 Pages
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73K222BL
V.22, V.21, Bell 212A, Bell 103
Single-Chip Modem with Integrated Hybrid
APPLICATIONS INFORMATION
GENERAL CONSIDERATIONS
Figure 5 shows the basic circuit diagram for a
73K222BL modem integrated circuit designed to be
used in conjunction with a control processor, a
UART or RS-232 serial data interface, and a DAA
phone line interface to function as a typical
intelligent modem. The K-Series ICs interface
directly with Intel 8048 and 80C51 microprocessors
for control and status monitoring purposes.
A typical DAA arrangement is shown in Figure 5.This
diagram is for reference only and does not represent
a production-ready modem design.
In most applications the controller will monitor the
serial data for commands from the DTE and the
received data for break signals from the far end
modem. In this way, commands to the modem are
sent over the same line as the transmitted data. In
other applications the RS-232 interface handshake
lines are used for modem control.
(continued)
RING DETECT
TX DATA
RX DATA
CONTROL
INTERFACE
11.0592 MHz
ADR/DATA BUS
µC ALE
µC WR
µC RD
+5
+
1 GND
2 CLK
3 XTL1
4 XTL2
5 AD0
6 AD1
7 AD2
8 AD3
9 AD4
10 AD5
11 AD6
12 AD7
13 ALE
14 WR
15 RD
16 VDD
10 µF
0.1 µF
RXCLK
TXCLK
EXCLK
CHIP SELECT
RXA 32
VREF 31
RESET 30
N/C 29
ISET 28
OH 27
RXCLK 26
RXD 25
TXD 24
CS 23
EXCLK 22
TXCLK 21
INT 20
NC 19
TXA1 18
TXA2 17
+5
2 MΩ 1 µF
0.1 µF
0.1 µF
8.2K
600
+5
RING
DETECTOR
HOOK
RELAY
FUSE
0.033 µF
TYP.
600Ω
1:1
TRANSIENT
SUPPRESSOR
FIGURE 5: Typical 73K222BL DAA Circuit
1
2
3
4
RJ-11
21
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