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ADM3311 数据表(PDF) 1 Page - Analog Devices

部件名 ADM3311
功能描述  15 kV ESD Protected, 2.7 V to 3.6 V Serial Port Transceiver with Green Idle?
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADM3311 数据表(HTML) 1 Page - Analog Devices

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REV. A
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.
a
ADM3311E*
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
15 kV ESD Protected, +2.7 V to +3.6 V
Serial Port Transceiver with Green Idle
FUNCTIONAL BLOCK DIAGRAM
C1+
C1–
C2+
C2–
C4
0.1 F
C2
0.1 F
V+
V–
C5
0.1 F
T1
7
T1OUT
T1IN
T2OUT
T2IN
20
T3OUT
T3IN
8
9
18
19
22
ADM3311E
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
R1IN
R2IN
R3IN
R4IN
R5IN
CMOS
INPUTS*
CMOS
OUTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
**
10
NOTES:
* INTERNAL 400k
PULL-UP RESISTOR ON EACH CMOS INPUT
** INTERNAL 5k
PULL-DOWN RESISTOR ON EACH RS-232 INPUT
21
17
16
15
14
13
12
11
EN
SD
VCC
VCC
C3–
GND
C3+
2
4
1
3
6
5
ENABLE
INPUT
VOLTAGE
TRIPLER/
INVERTER
+3V TO
9V
C1
0.1 F
C3
0.1 F
28
27
26
25
24
SHUTDOWN
INPUT
23
0.1 F
CERAMIC
1 F
T2
T3
R1
R2
R3
R4
R5
FEATURES
Green Idle Power Saving Mode
Full RS-232 Compliance
Operates with 3 V Logic
Low EMI
Ultralow Power CMOS: 450
A Operation
Low Power Shutdown: 20 nA
460 kbits/s Data Rate
0.1
F to 1
F Charge Pump Capacitors
Single +2.7 V to +3.6 V Power Supply
One Receiver Active in Shutdown
ESD >15 kV
Pin Compatible with DS14C335
APPLICATIONS
Laptop Computers
Notebook Computers
Printers
Peripherals
Modems
GENERAL DESCRIPTION
The ADM3311E is a three driver/five receiver product designed
to fully meet the EIA-232 standard while operating with a single
+2.7 V to +3.6 V power supply. The device features an on-board,
charge pump, dc-to-dc converter, eliminating the need for dual
power supplies. This dc-to-dc converter contains a voltage tri-
pler and voltage inverter, which internally generates positive and
negative supplies from the input +3 V power supply. The dc-
to-dc converter operates in Green Idle Mode, whereby the
charge pump oscillator is gated on and off to maintain the out-
put voltage at
±7.25 V under varying load conditions. This
minimizes the power consumption and makes these products
ideal for battery powered portable devices.
The ADM3311E is suitable for operation in harsh electrical
environments and contains ESD protection up to
±15 kV on all
I-O lines.
The ADM3311E contains three drivers and five receivers and
is intended for serial port applications on notebook/laptop
computers.
A shutdown facility is also provided that reduces the power
consumption to 3
µW. While in shutdown, one receiver remains
active, thereby allowing monitoring of peripheral devices. This
feature allows the device to be shut down until a peripheral device
begins communication. The active receiver can alert the processor,
which can then take the ADM3311E out of the shutdown
mode.
The ADM3311E is fabricated using CMOS technology for
minimal power consumption. It features a high level of over-
voltage protection and latch-up immunity.
The ADM3311E is packaged in a 28-lead SSOP/TSSOP
package.
*Protected by Patent No. 5,606,491.
Green Idle is a trademark of Analog Devices, Inc.


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