MAX3243EEWI Maxim Integrated Products, MAX3243EEWI Datasheet - Page 7
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MAX3243EEWI
Manufacturer Part Number
MAX3243EEWI
Description
IC TXRX RS232 TRUE 1MBPS 28-SOIC
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.MAX3223EETP.pdf
(18 pages)
Specifications of MAX3243EEWI
Number Of Drivers/receivers
3/5
Protocol
RS232
Voltage - Supply
3 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MAX3243EEWI+
Manufacturer:
Maxim
Quantity:
25
Company:
Part Number:
MAX3243EEWI-T
Manufacturer:
PANASONIC
Quantity:
3 000
The MAX3221E/MAX3223E/MAX3243E’s internal power
supply consists of a regulated dual charge pump that
provides output voltages of +5.5V (doubling charge
pump) and -5.5V (inverting charge pump), over the
+3.0V to +5.5V V
in discontinuous mode: if the output voltages are less
than 5.5V, the charge pumps are enabled; if the output
voltages exceed 5.5V, the charge pumps are disabled.
Each charge pump requires a flying capacitor (C1, C2)
and a reservoir capacitor (C3, C4) to generate the V+
and V- supplies.
The transmitters are inverting level translators that con-
vert CMOS-logic levels to 5.0V EIA/TIA-232 levels. They
guarantee a 250kbps data rate with worst-case loads
of 3kΩ in parallel with 1000pF, providing compatibility
with PC-to-PC communication software such as
LapLink™. Transmitters can be paralleled to drive mul-
tiple receivers. The MAX3243E has been specifically
designed to drive serial mice. Figure 1 shows a com-
plete system connection. When FORCEOFF is driven to
ground, or the AutoShutdown circuitry senses invalid
voltage levels on all receiver inputs, the transmitters are
disabled and the outputs are forced into a high-imped-
ance state. When powered off or shut down, the output
can be driven up to ±12V. The transmitter inputs do not
have pull-up resistors.
LapLink is a trademark of Traveling Software.
±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps,
_______________Detailed Description
TQFN
EP
—
—
MAX3221E
Dual Charge-Pump Voltage Converter
TSSOP
SSOP/
—
—
—
RS-232 Transceivers with AutoShutdown
CC
_______________________________________________________________________________________
TQFN
EP
range. The charge pumps operate
—
—
MAX3223E
PIN
TSSOP
SSOP/
DIP/
RS-232 Transmitters
—
—
—
TSSOP
SSOP/
SO/
—
—
—
MAX3243E
19, 20
25, 32
9, 16,
THIN
QFN
EP
R_OUTB
NAME
GND
N.C.
Figure 1. Interface Under Control of PMU
MANAGEMENT
CONTROLLER
CPU
KEYBOARD
Noninverting Complementary Receiver Outputs.
Always active.
No Connection. Not internally connected.
Exposed Paddle. Solder the exposed paddle to the
ground plane or leave unconnected.
POWER-
UNIT OR
Pin Description (continued)
WITH
UART
CHIP
INVALID
FORCEOFF
FORCEON
I/O
FUNCTION
MAX3243E
RS-232
7