IC TXRX RS232 DUAL 250KBPS 20DIP

MAX3235EEPP

Manufacturer Part NumberMAX3235EEPP
DescriptionIC TXRX RS232 DUAL 250KBPS 20DIP
ManufacturerMaxim Integrated Products
TypeTransceiver
MAX3235EEPP datasheet
 

Specifications of MAX3235EEPP

Number Of Drivers/receivers2/2ProtocolRS232
Voltage - Supply4.5 V ~ 5.5 VMounting TypeThrough Hole
Package / Case20-DIP (0.300", 7.62mm)Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
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±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
RS-232 Transceivers with Internal Capacitors
Each transmitter is loaded with 3kΩ in parallel with
1000pF. The transmitter outputs display no ringing or
undesirable transients as they come out of shutdown.
Note that the transmitters are enabled only when the
magnitude of V- exceeds approximately -3V.
The MAX3233E/MAX3235E maintain the RS-232 ±5.0V
minimum transmitter output voltage even at high data
rates. Figure 8 shows a transmitter loopback test cir-
cuit. Figure 9 shows a loopback test result at 120kbps,
and Figure 10 shows the same test at 250kbps. For
T1IN
T1OUT
R1OUT
V
= 3.3V (MAX3233E), V
= 5.0V (MAX3235E)
CC
CC
2µs/div
Figure 9. Loopback Test Result at 120kbps
Table 3. Logic Family Compatibility with Various Supply Voltages
LOGIC POWER-SUPPLY
DEVICE
VOLTAGE
(V)
MAX3233E
3.3
MAX3233E
5
MAX3235E
3.3/5
______________________________________________________________________________________
Figure 9, all transmitters were driven simultaneously at
120kbps into RS-232 loads in parallel with 1000pF. For
Figure 10, a single transmitter was driven at 250kbps,
and all transmitters were loaded with an RS-232 receiv-
er in parallel with 250pF.
High Data Rates
Interconnection with 3V and 5V Logic
The MAX3233E/MAX3235E can directly interface with
various 5V logic families, including ACT and HCT
CMOS. See Table 3 for more information on possible
combinations of interconnections.
5V/div
T1IN
5V/div
T1OUT
5V/div
R1OUT
Figure 10. Loopback Test Result at 250kbps
V
CC
SUPPLY VOLTAGE
(V)
3.3
3.3
5
V
= 3.3V (MAX3233E), V
= 5.0V (MAX3235E)
CC
CC
2µs/div
COMPATIBILITY
Compatible with all CMOS families
Compatible with ACT and HCT CMOS, and
with AC, HC, or CD4000 CMOS
Compatible with all TTL and CMOS families
5V/div
5V/div
5V/div
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