MAX3384EEAP Maxim Integrated, MAX3384EEAP Datasheet - Page 7

• Manufacturer Part Number: MAX3384EEAP
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3384Er

Specifications of MAX3384EEAP

• Data Rate: 250 Kbps
• Operating Supply Voltage: 3 V to 5.5 V
• Supply Current: 1 mA
• Operating Temperature Range: 0 C to + 70 C
• Function: Transceiver
• Number Of Drivers: 2
• Number Of I/os: 8
• Number Of Receivers: 2
• Propagation Delay Time Ns: 0.15 us
• Shutdown: Yes

can be used. The charge pump requires 0.1µF capaci-
tors for 3.3V operation. For other supply voltages, refer
to Table 2 for required capacitor values. Do not use val-
ues smaller than those listed in Table 2. Increasing the
capacitor values (e.g., by a factor of 2) reduces ripple
on the transmitter outputs and slightly reduces power
consumption. C2, C3, and C4 can be increased without
changing C1’s value. However, do not increase C1
without also increasing the values of C2, C3, C4,
and C
the other capacitors).
When using the minimum required capacitor values,
make sure the capacitor value does not degrade
excessively with temperature. If in doubt, use capaci-
tors with a larger nominal value. The capacitor’s equiva-
Figure 3a. Human Body ESD Test Model
Figure 4a. IEC 1000-4-2 ESD Test Model
±15kV ESD-Protected, 3.0V to 5.5V, Low-Power,
VOLTAGE
SOURCE
VOLTAGE
SOURCE
HIGH-
HIGH-
DC
DC
BYPASS
CHARGE-CURRENT
CHARGE-CURRENT
LIMIT RESISTOR
LIMIT RESISTOR
50M to 100M
R
1M
R
to maintain the proper ratios (C1 to
100pF
C
C
150pF
C s
C s
_______________________________________________________________________________________
up to 250kbps, True RS-232 Transceiver
STORAGE
CAPACITOR
STORAGE
CAPACITOR
RESISTANCE
1500Ω
DISCHARGE
RESISTANCE
DISCHARGE
330Ω
R
R
D
D
DEVICE
UNDER
DEVICE
UNDER
TEST
TEST
lent series resistance (ESR), which usually rises at low
temperatures, influences the amount of ripple on V+
and V-.
In most circumstances, a 0.1µF V
is adequate. In applications that are sensitive to power-
supply noise, use a capacitor of the same value as
charge-pump capacitor C1. Connect bypass capaci-
tors as close to the IC as possible.
Transmitter outputs will meet EIA/TIA-562 levels of
±3.7V with supply voltages as low as 2.7V.
Figure 3b. Human Body Model Current Waveform
Figure 4b. IEC 1000-4-2 ESD Generator Current Waveform
AMPERES
t r = 0.7ns to 1ns
I
P
36.8%
100%
90%
10%
0
100%
0
90%
10%
I
t
RL
30ns
Power-Supply Decoupling
CURRENT WAVEFORM
Operation Down to 2.7V
TIME
t
DL
60ns
I r
CC
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
bypass capacitor
t
7