ADM561 Analog Devices, ADM561 Datasheet - Page 3

• Manufacturer Part Number: ADM561
• Description: Ultralow Power/ +3.3 V/ RS-232 Notebook PC Serial Port Drivers/Receivers
• Manufacturer: Analog Devices

REV. 0
Mnemonic
V
V+
V–
GND
C1+, C1–
C2+, C2–
T
T
R
R
EN/EN
SHDN/SHDN
CC
IN
OUT
IN
OUT
Normal Operation
Shutdown Mode
PIN FUNCTION DESCRIPTION
Power Supply Input 3.3 V
Internally Generated Positive Supply (+6.6 V
Internally Generated Negative Supply (–6.6 V
Ground Pin. Must Be Connected to 0 V.
Transmitter (Driver) Inputs. These Inputs
Accept 3 V or 5 V Logic Levels. An Internal
400 k Pull-Up Resistor to V
On Each Input.
Transmitter (Driver) Outputs (Typically
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.
Receiver Outputs. These are 3 V Logic
Levels.
Receiver Enable (Active High on ADM560);
Active Low on ADM561) Refer to Table I.
Shutdown Control (Active Low on ADM560);
(Active High on ADM561) Refer to Table I.
Function
Nominal).
Nominal).
External Capacitor 1 Is Connected Between
These Pins.
External Capacitor 2 Is Connected Between
These Pins.
6 V).
ADM560
SHDN = 1
EN = 1 Receivers Active
EN = 0 Receivers Inactive
SHDN = 0
EN = 1 Receivers R1–R3 Inactive
EN = 1 Receivers R4 & R5 Active
EN = 0 Receivers R1–R5 Inactive
10%.
CC
Is Connected
Table I.
–3–
R2
R1
T3
T1
T2
GND
T2
R1
R2
T1
V
OUT
OUT
OUT
OUT
OUT
C1+
C1–
PIN CONFIGURATIONS
CC
V+
IN
IN
IN
IN
10
11
12
13
14
1
2
3
4
5
6
7
9
8
ADM561
SHDN = 0
EN = 0; Receivers Active
EN = 1; Receivers Inactive
SHDN = 1
EN = 0; Receivers Inactive
EN = 1; Receivers Inactive
(Not to Scale)
ADM560
ADM561
TOP VIEW
ADM560/ADM561
28
26
25
24
23
22
21
20
19
17
15
27
18
16
T4
R3
R3
SHDN (ADM560)
SHDN (ADM561)
EN (ADM560)
EN (ADM561)
R4
R4
T4
T3
R5
R5
V–
C2–
C2+
OUT
IN
OUT
IN
OUT
IN
IN
OUT
IN