MAX212CWG Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 3V-Powered, Low-Power, True RS-232 Transceiver

19-0162; Rev 2; 2/94
INFOERVMAALUTIAOTNIOINNCKLIUT ^DED
+3V-Powered, Low-Power,
True RS-232 Transceiver
________________General Description
The MAX212 RS-232 transceiver is intended for 3V-pow-
ered EIA/TIA-232E and V.28/V.24 communication inter-
faces where 3 drivers and 5 receivers are needed with
minimum power consumption. The operating voltage
range extends from 3.6V down to 3.0V while still main-
taining true RS-232 and EIA/TIA-562 voltage levels.
A 1µA typical shutdown mode reduces power con-
sumption, extending battery life in portable systems.
While shut down, all receivers can remain active or can
be disabled under logic control. This enables a system
incorporating the CMOS MAX212 to be in low-power
shutdown mode and monitor incoming RS-232 activity.
A guaranteed data rate of 120kbps provides compati-
bility with popular software for communicating with per-
sonal computers.
Three-state drivers on all receiver outputs are provided
so that multiple receivers, generally of different inter-
face standards, can be wire-ORed at the UART.
The MAX212 is available in both small-outline (SO) and
shrink-small-outline (SSOP) packages. The SSOP
package occupies less than half of the board area
required by the equivalent SO package.
________________________Applications
Computers
Notebooks/Palmtops/Subnotebooks
Printers
Peripherals
Instruments
_______________Ordering Information
PART
MAX212CWG
MAX212CAG
MAX212C/D
MAX212EWG
MAX212EAG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
* Dice are tested at TA = +25°C only.
PIN-PACKAGE
24 Wide SO
24 SSOP
Dice*
24 Wide SO
24 SSOP
EV KIT
MAX212EVKIT-SSOP
TEMP. RANGE
0°C to +70°C
BOARD TYPE
Surface Mount
____________________________Features
SUPERIOR TO BIPOLAR:
o Operates from Single +3.0V to +3.6V Supply
o 24-Pin SSOP or Wide SO Packages
o Meets All EIA/TIA-232E & EIA/TIA-562
Specifications
o 3mA Max Supply Current (Unloaded)
o 1µA Low-Power Shutdown Mode
o All Receivers Active During Low-Power Shutdown
o Mouse Compatible at 3.0V
o Low-Cost, Surface-Mount External Components
o 120kbps Guaranteed Data Rate—LapLink™
Compatible
o Three-State Receiver Outputs
o Evaluation Kit Available
o Flow-Through Pinout
___________Typical Operating Circuit
+3.3V
SHUTDOWN
23 1
2 14
V+ LN
3 _VCC
LP V-
DC-DC CONVERTER
4 _SD
MAX212
11 T1IN
T1
T1OUT 17
12 T2IN
T2
T2OUT 16
13 T3IN
T3
T3OUT 15
6 R1OUT
R1
R1IN 22
7 R2OUT
R2
R2IN 21
8 R3OUT
R3
R3IN 20
9 R4OUT
R4
R4IN 19
10 R5OUT
R5
R5IN 18
™LapLink is a registered trademark of Traveling Software.
ENABLE
EN GND
5 24
________________________________________________________________ Maxim Integrated Products 1
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