MAX3180EUK+T Maxim Integrated Products, MAX3180EUK+T Datasheet - Page 5

• Manufacturer Part Number: MAX3180EUK+T
• Description: IC RS-232 RX 1.5MBPS SOT23-5
• Manufacturer: Maxim Integrated Products
• Type: Receiverr

Specifications of MAX3180EUK+T

• Number Of Drivers/receivers: 0/1
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
peripheral 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 dia-
gram for INVALID operation.
The MAX3180E/MAX3182E feature an enable input
(EN). Drive EN high to force ROUT into a high-imped-
ance state. In this state, the devices ignore incoming
RS-232 signals. Pull EN low for normal operation.
As with all Maxim devices, ESD protection structures
are incorporated on all pins to protect against ESD
encountered during handling and assembly. The
receiver inputs of the MAX3180E–MAX3183E have extra
protection against static electricity. Maxim’s engineers
have developed state-of-the-art structures enabling
these pins to withstand ESD up to ±15kV without dam-
age or latchup. The receiver inputs of the MAX3180E–
MAX3183E are characterized for protection to the fol-
lowing limits:
Figure 3 shows the Human Body Model, and Figure 4
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
Figure 2. Input Levels and
±15kV using the Human Body Model
±8kV using the Contact Discharge method specified
in IEC 1000-4-2
±15kV using the Air-Gap Discharge method speci-
fied in IEC 1000-4-2
±15kV ESD-Protected, 0.5µA, +3V to +5.5V,
+2.7V
+0.3V
-0.3V
-2.7V
0
_______________________________________________________________________________________
1.5Mbps RS-232 Receivers in SOT23-5
INVALID Timing
INDETERMINATE
INDETERMINATE
INVALID SIGNALS
VALID SIGNALS
VALID SIGNALS
Signal Invalid Detector
Human Body Model
ESD Protection
Enable Input
RECEIVER
VOLTAGE
INVALID
OUTPUT
INPUT
(V)
(V)
V
a 100pF capacitor charged to the ESD voltage of inter-
est, and then discharged into the test device through a
1.5kΩ resistor.
Figure 3. Human Body ESD Test Model
Figure 4. Human Body Model Current Waveform
CC
AMPERES
0
VOLTAGE
SOURCE
HIGH-
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT
0
LIMIT RESISTOR
0
t
INVL
1M
t
R
RI
C
100pF
C s
CURRENT WAVEFORM
STORAGE
CAPACITOR
TIME
1500
RESISTANCE
DISCHARGE
R
D
t
DL
I r
t
INVH
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
INVALID
REGION
DEVICE
UNDER
TEST
5