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MAX3212CWI Datasheet

  • MAX3212CWI

  • +2.7V至+3.6V供電、1μA電源電流、3驅(qū)動(dòng)器/5接收器、真RS-232收...

  • 12頁(yè)

  • MAXIM   MAXIM

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19-0312; Rev 0; 9/94
+2.7V to +3.6V-Powered, 1碌A(chǔ) Supply Current,
3-Driver/5-Receiver, True RS-232 Transceiver
_______________General Description
The MAX3212 uses Maxim鈥檚 new proprietary Auto-
Shutdown mode to reduce supply current to 1碌A(chǔ). The
MAX3212, with 3 RS-232 drivers and 5 RS-232 receivers,
is intended for 2.7V to 3.6V-powered EIA/TIA-232E and
V.28/V.24 serial interface. True RS-232 levels are main-
tained across the operating range. A guaranteed data
rate of 235kbps provides compatibility with popular soft-
ware for communicating with personal computers.
Supply current is reduced to 1碌A(chǔ) with Maxim鈥檚 new
AutoShutdown feature. When the MAX3212 does not
sense a valid signal level on the receiver inputs, the on-
board power supply and drivers shut down. This occurs
if the RS-232 cable is disconnected or if the transmit-
ters of the connected peripheral are turned off. The sys-
tem turns on again when a valid level is applied to any
RS-232 receiver input. As a result, the system saves
power without changes to the existing software.
A second power-management feature is incorporated to
permit automatic shutdown when the RS-232 connection
is valid but inactive. In this case, a transition detector
facilitates shutdown when the receivers are presented
with stationary RS-232 levels for long periods.
Three-state drivers are provided on receiver outputs so
that multiple receivers, generally of different interface
standards, can be wire-ORed at the UART. The
MAX3212 is available in 28-pin SO and SSOP packages.
____________________________Features
BETTER THAN BIPOLAR!
o
o
o
o
o
o
o
1碌A(chǔ) Supply Current Using AutoShutdown
Operates from Single +2.7V to +3.6V Supply
28-Pin SSOP or Wide SO Packages
Meets All EIA/TIA-232E & EIA/TIA-562 Specifications
Mouse Driveability鈥揋uaranteed
Low-Cost, Surface-Mount External Components
235kbps Guaranteed Data Rate鈥?/div>
LapLink鈩?Compatible
o
+5V Logic Compatible
o
Complementary Receiver Output Always Active
o
Flow-Through Pinout
MAX3212*
__________Typical Operating Circuit
0.68碌F 1N6050 15碌H
+3.0V
0.33碌F
3 27
1
V
CC
V+ LN
26 FORCEON
+3.0V
25 FORCEOFF
5 TRAN
6
INVALID
T1
T2
T3
R1
5k
9 R2OUT
R2
5k
10 R3OUT
R3
5k
11 R4OUT
R3IN 22
R2IN 23
T1OUT 19
T2OUT 18
T3OUT 17
R1IN 24
13 T1IN
14 T2IN
15 T3IN
1N6050
2 16
LP
V-
0.33碌F
MAX3212
________________________Applications
Notebook and Palmtop Computers
Peripherals
Instruments
Battery-Powered Equipment
8 R1OUT
______________Ordering Information
PART
MAX3212CWI
MAX3212CAI
MAX3212EWI
MAX3212EAI
TEMP. RANGE
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
28 Wide SO
28 SSOP
28 Wide SO
28 SSOP
+3.0V
EN
4
12 R5OUT
7 R5OUTB
R4
5k
R5
R5
5k
GND
28
R4IN 21
R5IN 20
AUTOSHUTDOWN OPERATION
FORCEOFF = HIGH, FORCEON = LOW
Pin Configuration appears at end of data sheet.
* Patent pending
RS-232 Present
Yes
No
Status
On
Shut Down
________________________________________________________________
Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.

MAX3212CWI PDF文件相關(guān)型號(hào)

MAX3222EEAP,MAX3222EEPN,MAX3222EEUP,MAX3222EEWN,MAX323,MAX3232ECAE,MAX3232ECPE,MAX3232ECWE,MAX323C/D,MAX323CPA,MAX323CUA,MAX323EJA,MAX323EPA,MAX323ESA,MAX323MJA,MAX324,MAX324EJA,MAX325,MAX325CPA,MAX325CSA,MAX325CUA,MAX325EJA,MAX325EPA,MAX325ESA,MAX325MJA

MAX3212CWI 產(chǎn)品屬性

  • Maxim Integrated Products

  • 235 Kbps

  • 2.7 V to 3.6 V

  • 3 mA

  • 0 C to + 70 C

  • Transceiver

  • 3

  • 17

  • 5

  • 2 us

  • Yes

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