MAX3183EUK-T Maxim Integrated, MAX3183EUK-T Datasheet - Page 5

• Manufacturer Part Number: MAX3183EUK-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3180, MAX3181, MAX3182, MAX3183r

The MAX3180–MAX3183 are EIA/TIA-232 and V.28/
V.24 communications receivers that convert RS-232
signals to CMOS logic levels. The devices operate on a
supply voltage of +3V to +5.5V and have a 1.5Mbps
data rate capability. They achieve a 0.5µA typical sup-
ply current. The MAX3180/MAX3182 have a receiver
enable control (EN), while the MAX3181/MAX3183 con-
tain a signal invalid output (INVALID). The MAX3180/
MAX3181 invert the ROUT signal relative to RIN. The
MAX3182/MAX3183 are not inverted. The devices
come in SOT23-5 packages.
Figure 1. Receiver Propagation-Delay Timing
Figure 2. Input Levels and INVALID Timing
ROUT
RIN
V
V
OH
OL
5V
0
+2.7V
+0.3V
-0.3V
-2.7V
50%
0
_______________________________________________________________________________________
INVALID SIGNALS (INVALID = 0)
VALID SIGNALS (INVALID = 1)
VALID SIGNALS (INVALID = 1)
Detailed Description
INDETERMINATE
INDETERMINATE
50%
t
PLH
50%
50%
t
PHL
RS-232 Receivers in SOT23-5
RECEIVER
VOLTAGE
OUTPUT
INVALID
INPUT
(V)
(V)
If no valid signal levels appear on RIN for 30µs (typ),
INVALID goes low. This event typically occurs if the RS-
232 cable is disconnected or if the connected peripher-
al transmitter is turned off. INVALID goes high when a
valid level is applied to the RS-232 receiver input.
Figure 2 shows the input levels and timing diagram for
INVALID operation.
The MAX3180/MAX3182 feature an enable input. Drive
EN high to force ROUT into a high-impedance state. In
this state, the devices ignore incoming RS-232 signals.
Drive EN low for normal operation.
In most circumstances, a 0.1µF V
is adequate for power-supply decoupling. Connect the
bypass capacitor as close to the IC as possible.
TRANSISTOR COUNT: 41
V
CC
+3V to +5.5V, 1.5Mbps
0
t
INVL
Power-Supply Decoupling
Signal Invalid Detector
Chip Information
CC
t
INVH
bypass capacitor
Enable Input
INVALID
REGION
5