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參數(shù)資料
型號： ADM222ANZ
廠商： Analog Devices Inc
文件頁數(shù)： 6/11頁
文件大?。?/td> 0K
描述： IC TX/RX RS-232 5V W/SD 18DIP
標準包裝： 20
類型： 收發(fā)器
驅動器/接收器數(shù)： 2/2
規(guī)程： RS232
電源電壓： 4.5 V ~ 5.5 V
安裝類型： 通孔
封裝/外殼： 18-DIP（0.300"，7.62mm）
供應商設備封裝： 18-PDIP
包裝： 管件
產品目錄頁面： 789 (CN2011-ZH PDF)
REV.
ADM222/ADM232A/ADM242
–4–
VIN
VOUT
50pF
3k
SHDN
Figure 5. Shutdown Test Circuit
+ 5V
TRANSMITTER
OUTPUT
SHDN
INPUT
– 5V
V+
0V
3V
V–
tDT
Figure 6. Transmitter Shutdown Disable Timing
2
4
6
5
12
11
13
10
3
7
15
8
14
9
18
* INTERNAL 400k PULL-UP RESISTOR
ON EACH TTL/CMOS INPUT
** INTERNAL 5k PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
+5V TO +10V
VOLTAGE DOUBLER
+5V TO –10V
VOLTAGE INVERTER
C1+
C1–
V+
V–
C2+
C2–
T1
ADM222
T2
R1
R2
C1
0.1 F
C2
0.1 F
C3
0.1 F
GND
TTL/CMOS
OUTPUTS
R1OUT
R2OUT
T1OUT
T2OUT
R1IN
R2IN
T1IN
T2IN
TTL/CMOS
INPUTS
*
RS-232
OUTPUTS
RS-232
INPUTS
**
5V INPUT
C5
0.1 F
6.3V
SHDN
16
C4
0.1 F
VCC
17
Figure 7. ADM222 Typical Operating Circuit
PIN FUNCTION DESCRIPTION
Mnemonic
Function
VCC
Power Supply Input, 5 V
± 10%.
V+
Internally generated positive supply (+10 V
nominal).
V–
Internally generated negative supply (–10 V
nominal).
GND
Ground Pin. Must be connected to 0 V.
C1+
External capacitor 1, (+ terminal) is connected
to this pin.
C1–
External capacitor 1, (– terminal) is connected
to this pin.
C2+
External capacitor 2, (+ terminal) is connected
to this pin.
C2–
External capacitor 2, (– terminal) is connected
to this pin.
TIN
Transmitter (Driver) Inputs. These inputs accept
TTL/CMOS levels. An internal 400 k
pull-up
resistor to VCC is connected on each input.
TOUT
Transmitter (Driver) Outputs. These are RS-232
levels (typically
±9 V).
RIN
Receiver Inputs. These inputs accept RS-232
signal levels. An internal 5 k
pull-down resistor
to GND is connected on each of these inputs.
ROUT
Receiver Outputs. These are TTL/CMOS levels.
NC
No Connect. No connections are required to
this pin.
EN
(ADM242 Only) Active Low Digital Input. May
be used to enable or disable (three-state) both
receiver outputs.
SHDN
(ADM222 and ADM242) Active Low Digital
Input. May be used to disable the device so that
the power consumption is minimized. On the
ADM222 all drivers and receivers are disabled.
On the ADM242 the drivers are disabled but the
receivers remain enabled.
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
TOP VIEW
(Not to Scale)
ADM222
NC = NO CONNECT
R2IN
T2OUT
NC
C1+
V+
C1–
V–
C2–
C2+
T2IN
SHDN
VCC
GND
T1OUT
T1IN
R1OUT
R1IN
R2OUT
Figure 8. ADM222 DIP and SOIC Pin Configurations
B
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參數(shù)描述
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