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ADM211ARZ Datasheet(PDF) 8 Page - Analog Devices

Part No. ADM211ARZ
Description  0.1 μF, 5 V Powered CMOS RS-232 Drivers/Receivers
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM206/ADM207/ADM208/ADM211/ADM213
Rev. D | Page 8 of 16
Table 4. Pin Function Descriptions
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 (+ terminal) is connected to this pin.
C1–
External Capacitor (– terminal) is connected to this pin.
C2+
External Capacitor (+ terminal) is connected to this pin.
C2–
External Capacitor (– terminal) is connected to this pin.
TIN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to VCC is connected to
each input.
TOUT
Transmitter (Driver) Outputs. These are RS-232 levels (typically ± 10 V).
RIN
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is connected to each
input.
ROUT
Receiver Outputs. These are TTL/CMOS levels.
EN/EN
Enable Input. Active low on ADM206 and ADM211. Active high on ADM213. This input is used to enable/disable the receiver
outputs. With EN = low (EN = high ADM213), the receiver outputs are enabled. With EN = high (EN = low ADM213), the
outputs are placed in a high impedance state. This is useful for connecting to microprocessor systems.
SD/SD
Shutdown Input. Active high on ADM206 and ADM211. Active low on ADM213. With SD = high on the ADM206 and ADM211,
the charge pump is disabled, the receiver outputs are placed in a high impedance state, and the driver outputs are turned off.
With SD = low on the ADM213, the charge pump is disabled, the driver outputs are turned off, and all receivers, except R4 and
R5, are placed in a high impedance state. In shutdown, the power consumption reduces to 5 μW.
NC
No Connect. No connections are required to this pin.
Table 5. ADM206 and ADM211 Truth Table
SD
EN
Status
Transmitters T1–T5
Receivers R1–R5
0
0
Normal Operation
Enabled
Enabled
0
1
Normal Operation
Enabled
Disabled
1
0
Shutdown
Disabled
Disabled
Table 6. ADM213 Truth Table
SD
EN
Status
Transmitters T1–T4
Receivers R1–R3
Receivers R4, R5
0
0
Shutdown
Disabled
Disabled
Disabled
0
1
Shutdown
Disabled
Disabled
Enabled
1
0
Normal Operation
Enabled
Disabled
Disabled
1
1
Normal Operation
Enabled
Enabled
Enabled




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