ADM561 Analog Devices, ADM561 Datasheet

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ADM561

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

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADM561JR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADM561JRSZ
Manufacturer:
AD
Quantity:
1 000
a
GENERAL DESCRIPTION
The ADM560/ADM561 are four driver/five receiver interface
devices designed to meet the EIA-232 standard while operating
with a single +3.3 V power supply. The devices feature an on-
board dc-to-dc converter, eliminating the need for dual 5 V
power supplies. This dc-dc converter contains a voltage doubler
and voltage inverter which internally generates 6.6 V from the
input +3.3 V power supply.
The ADM560 and ADM561 consume only 5 mW making
them ideally suited for battery and other power-sensitive appli-
cations. A shutdown facility is also provided which reduces the
power to 0.66 W.
The ADM560 contains active low shutdown and active high
receiver enable signals. In shutdown mode, two receivers remain
active thereby allowing monitoring of peripheral devices. This
feature allows the device to be shut down until a peripheral
device begins communication. The active receivers can alert the
processor which can then take the ADM560 out of the shut-
down mode.
The ADM561 features active high shutdown and an active
low receiver enable. In this device all receivers are disabled in
shutdown.
The ADM560/ADM561 is fabricated using CMOS technology
for minimal power consumption. It features a high level of over-
voltage protection and latch-up immunity. The receiver inputs
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
RS-232 Compatible
Operates with 3 V or 5 V Logic
Ultralow Power CMOS: 1.3 mA Operation
Low Power Shutdown: 0.2 A
Suitable for Serial Port Mice
116 kbits/s Data Rate
1 F Charge Pump Capacitors
Single +3 V to +3.6 V Power Supply
Two Receivers Active in Shutdown (ADM560)
APPLICATIONS
Laptop Computers
Palmtop Computers
Notebook Computers
Peripherals
Modems
Printers
Battery Operated Equipment
Notebook PC Serial Port Drivers/Receivers
can withstand up to 25 V levels. The transmitter inputs can be
driven from either 3 V or 5 V logic levels. This allows operation
in mixed 3 V/5 V power supply systems.
The ADM560/ADM561 is packaged in a 28-pin SO and a
28-pin SSOP package.
Model
ADM560JR
ADM560JRS
ADM561JR
ADM561JRS
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
OUTPUTS
Ultralow Power, +3.3 V, RS-232
INPUTS
CMOS
CMOS
EN (ADM560)
EN (ADM561)
R1
R2
R3
R4
R5
10V
1 F
1 F
10V
T1
T2
T3
T4
OUT
OUT
OUT
OUT
OUT
FUNCTIONAL BLOCK DIAGRAM
IN
IN
IN
IN
12
14
15
16
22
19
24
20
21
26
5
Temperature Range
0 C to +70 C
0 C to +70 C
0 C to +70 C
0 C to +70 C
7
6
8
C1+
C2+
C2–
ORDERING GUIDE
C1–
ADM560/ADM561
+3.3V TO +6.6V
+6.6V TO –6.6V
GND
10
DOUBLER
VOLTAGE
INVERTER
VOLTAGE
T2
T3
T4
T1
R5
R2
R3
R4
R1
ADM560
ADM561
V
V–
CC
V+
17
25
13
27
23
18
11
28
4
+3.3V INPUT
3
1
9
2
Package Option
R-28
RS-28
R-28
RS-28
T1
T2
T3
T4
SHDN (ADM561)
SHDN (ADM560)
Fax: 617/326-8703
R1
R2
R3
R4
R5
1 F
6.3V
1 F
10V
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
0.1 F

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ADM561 Summary of contents

Page 1

... OUT EN (ADM560) EN (ADM561) can withstand levels. The transmitter inputs can be driven from either logic levels. This allows operation in mixed 3 V/5 V power supply systems. The ADM560/ADM561 is packaged in a 28-pin SO and a 28-pin SSOP package. Model ADM560JR ADM560JRS ADM561JR ADM561JRS One Technology Way, P ...

Page 2

... V = 3.3 V, Three Transmitter Outputs CC Loaded with Ground V = 3.0 V, All Transmitter Outputs CC Loaded into Ground No Load Load,T = GND IN SHDN = GND (ADM560); SHDN = V (ADM561 EN, EN, SHDN, SHDN, IN, T EN, EN, SHDN, SHDN IN GND 1.6 mA OUT I = –40 A ...

Page 3

... Resistor to GND Is Connected on Each of These Inputs. R Receiver Outputs. These are 3 V Logic OUT Levels. EN/EN Receiver Enable (Active High on ADM560); Active Low on ADM561) Refer to Table I. SHDN/SHDN Shutdown Control (Active Low on ADM560); (Active High on ADM561) Refer to Table I. Normal Operation Shutdown Mode REV 10% ...

Page 4

... Table I shows the truth table for the enable and shutdown con- trol signals. When disabled, all receivers are placed in a high impedance state. In shutdown, all transmitters are disabled and all receivers on the ADM561 are disabled. On the ADM560, receivers R4 and R5 remain enabled in shutdown. –4– ...

Page 5

... Figure 7. Transmitter Slew Rate vs. Load Capacitance –3 –4 –5 –6 –7 –8 –9 –10 5.0 5.5 2.5 CC Figure 8. Transmitter Output Voltage Low vs. V –5– ADM560/ADM561 = + +3. 80kbps 160kbps 20kbps 500 1000 1500 2000 2500 3000 LOAD CAPACITANCE – + +3.3V ...

Page 6

... ADM560/ADM561 + 3. – 1µF ALL TRANSMITTERS UNLOADED 5 V+ AND V– V+ LOADED 0 EQUALLY LOADED NO LOAD ON V– –5 – CURRENT – mA Figure 9. V+, V– vs. Load Current Dimensions shown in inches and (mm). V– LOADED NO LOAD PIN 1 ...

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