73K222AL-IHR データシートの表示（PDF） - Teridian Semiconductor Corporation
部品番号
コンポーネント説明
メーカー
73K222AL-IHR Datasheet PDF : 27 Pages
| |||
APPLICATIONS INFORMATION
GENERAL CONSIDERATIONS
Figures 1 and 2 show basic circuit diagrams for
K-Series modem integrated circuits. K-Series products
are 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. Two typical DAA
arrangements are shown: one for a split ±5 or ±12 volt
design and one for a single 5 volt design. These
diagrams are for reference only and do not represent
production-ready modem designs.
K-Series devices are available with two control
interface versions: one for a parallel multiplexed
address/data interface, and one for a serial interface.
73K222AL
V.22, V.21, Bell 212A, 103
Single-Chip Modem
DATA SHEET
The parallel version is intended for use with
8039/48 or 8031/51 microcontrollers from Intel or
many other manufacturers. The serial interface 22-
pin version can be used with other
microcontrollers or in applications where only a
limited number of port lines are available or the
application does not lend itself to a multiplexed
address/data interface. The parallel versions may
also be used in the serial mode, as explained in
the data sheet pin description.
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.
N/C
RS232
LEVEL
CONVERTERS
RTS
CA
CTS
CB
CC
DSR
DTR
CD
DCD
CF
TXD
BA
RXD
BB
DA
EXCLK
DD
RXCLK
TXCLK
DB
XTL2 XTL1
INT
80C51
P1.0
P1.1
P1.2
P1.3
P1.5
P1.6
P0.0-7
RD
WR
ALE
P3.1
P3.2
P3.0 P1.7 RESET
U5, U6
MC145406
C14
39 pF
Y1
11.0592
MHZ
C13
18 pF
+5V
CLK XTL1
R10
2.2M
XTL2 VDD
C9
0.1 µF
INT
ISET C10
0.1 µF
GND C11
0.1 µF
RD
VREF
WR
ALE
RXA
CS
K-SERIES
LOW
POWER
FAMILY
C6
0.1 µF
RXA
RESET
TXA
+5V
C12
1 µF
TXA
C7 R6
0.1 µF 20K
+ C8
22 µF
C1
390 pF
R5
37.4K
C2
300 pF
R7
43.2K
-
LM 1458
U1A +
C3
1000 pF
R4
20K
R4
5.1K
R3
3.6K
V+
-
LM 1458
+
U1B
V–
R1
475 1%
D3, D4
4.7V
ZENER
C4
0.033 µF
T1
MIDCOM
671-8005
C5
0.47 µF
250V
U2
4N35
D1
IN4004
+5V
K1
R8
D2
22K
IN914
R9
10K
Q1
2N2222A
+5
22K
T
VR1
MOV
V250L20
R
Page: 21 of 27
FIGURE 1: Basic Box Modem with Dual-Supply Hybrid
© 2007 TERIDIAN Semiconductor Corporation
Rev 6.1
Share Link: 