MAX3318CUP-T Maxim Integrated, MAX3318CUP-T Datasheet - Page 11
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MAX3318CUP-T
Manufacturer Part Number
MAX3318CUP-T
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX3316, MAX3317, MAX3318, MAX3319r
Datasheet
1.MAX3317CUP-T.pdf
(15 pages)
Specifications of MAX3318CUP-T
Data Rate
460 Kbps
Operating Supply Voltage
2.5 V
Supply Current
1 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Function
Transceiver
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Number Of Drivers
2
Number Of I/os
8
Number Of Receivers
2
Propagation Delay Time Ns
0.175 us
Shutdown
Yes
Figure 4b. AutoShutdown Plus, INVALID , and READY Timing Diagram
Figure 5. AutoShutdown Plus Initial Turn-On to Wake Up a
Mouse or Another System
MANAGEMENT
OUTPUT
OUTPUT
INVALID
*MAX3318/MAX3319
TRANSMITTER
TRANSMITTER
READY
POWER-
UNIT
RECEIVER
OUTPUTS
INPUTS
INPUTS
*V
V
V
CC
CC
V+
CC
V-
0
0
0
t
INVL
MASTER SHDN LINE
______________________________________________________________________________________
FORCEOFF
MAX3318
MAX3319
0.1µF
t
INVH
FORCEON
RS-232-Compatible Transceivers
1MΩ
t
AUTOSHDN
t
C2, C3, C4, and C
(C1 to other capacitors).
When using the minimum-required capacitor values,
make sure the capacitor value does not degrade exces-
sively with temperature. If in doubt, use capacitors with
a higher nominal value. The capacitor’s equivalent
series resistance (ESR), which usually rises at low tem-
peratures, influences the amount of ripple on V+ and V-.
In most circumstances, a 0.1µF bypass capacitor is
adequate. In applications that are sensitive to power-
supply noise, decouple V
of the same value as charge pump capacitor C1.
Connect bypass capacitors as close to the IC as possible.
Figure 2 shows two transmitter outputs when exiting
shutdown mode. As they become active, the two trans-
mitter outputs are shown going to opposite RS-232-
compatible levels (one transmitter input is high, the
other is low). Each transmitter is loaded with 3kΩ in par-
WU
2.5V, 1µA, 460kbps,
t
AUTOSHDN
BYPASS
Transmitter Outputs when
Power-Supply Decoupling
CC
to maintain proper ratios
to ground with a capacitor
Exiting Shutdown
t
WU
}
INVALID
REGION
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