Datasheet
ADM560/ADM561
Rev. B | Page 5 of 12
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
T3
OUT
1
T1
OUT
2
T2
OUT
3
R2
IN
4
T4
OUT
28
R3
IN
27
R3
OUT
26
SHDN
25
R2
OUT
5
T2
IN
6
T1
IN
7
EN
24
R4
IN
23
R4
OUT
22
R1
OUT
8
T4
IN
21
R1
IN
9
T3
IN
20
GND
10
R5
OUT
19
V
CC
11
R5
IN
18
C1+
12
V–
17
V+
13
C2–
16
C1–
14
C2+
15
ADM560
TOP VIEW
(Not to Scale)
05667-002
T3
OUT
1
T1
OUT
2
T2
OUT
3
R2
IN
4
T4
OUT
28
R3
IN
27
R3
OUT
26
SHDN
25
R2
OUT
5
T2
IN
6
T1
IN
7
EN
24
R4
IN
23
R4
OUT
22
R1
OUT
8
T4
IN
21
R1
IN
9
T3
IN
20
GND
10
R5
OUT
19
V
CC
11
R5
IN
18
C1+
12
V–
17
V+
13
C2–
16
C1–
14
C2+
15
ADM561
TOP VIEW
(Not to Scale)
05667-012
Figure 2.ADM560 Pin Configuration Figure 3. ADM561 Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
2, 3, 1, 28 T1
OUT
to T4
OUT
Transmitter (Driver) Outputs. Typically ±6 V.
9, 4, 27, 23, 18 R1
IN
to R5
IN
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is
connected on each of these inputs.
8, 5, 26, 22, 19 R1
OUT
to R5
OUT
Receiver Outputs. These are 3 V logic levels.
7, 6, 20, 21 T1
IN
to T4
IN
Transmitter (Driver) Inputs. These inputs accept 3 V or 5 V logic levels. An internal 400 kΩ pull-up resistor
to V
CC
is connected on each input.
10 GND Ground Pin. Must be connected to 0 V.
11 V
CC
Power Supply Input 3.3 V ± 10%.
12, 14 C1+, C1− External Capacitor 1 is connected between these pins.
13 V+ Internally Generated Positive Supply. +6.6 V nominal.
15, 16 C2+, C2− External Capacitor 2 is connected between these pins.
17 V− Internally Generated Negative Supply. −6.6 V nominal.
24
EN/
EN Receiver Enable. EN, active high on ADM560. EN, active low on ADM561. Refer to Table 4.
25
SHDN/SHDN Shutdown Control. SHDN, active low on ADM560. SHDN, active high on ADM561. Refer to Table 4.
Table 4. ADM560/ADM561 Enable and Shutdown Control
ADM560 ADM561
SHDN = 1
SHDN = 0
EN = 1; receivers active
EN = 0; receivers active
Normal Operation
EN = 0; receivers inactive
EN = 1; receivers inactive
SHDN = 0
SHDN = 1
EN = 1; Receiver R1 to Receiver R3 inactive
EN = 0; receivers inactive
EN = 1; Receiver R4 and Receiver R5 active
EN = 1; receivers inactive
Shutdown Mode
EN = 0; Receiver R1 to Receiver R5 inactive