MAX3235EEWP+TG36 Maxim Integrated Products, MAX3235EEWP+TG36 Datasheet - Page 11

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MAX3235EEWP+TG36

Manufacturer Part Number
MAX3235EEWP+TG36
Description
IC TXRX RS-232 DL 20-SOIC
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX3235EEWP+TG36

Number Of Drivers/receivers
2/2
Protocol
RS232
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
Figure 9. Loopback Test Result at 120kbps
Table 3. Logic Family Compatibility with Various Supply Voltages
±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
MAX3233E
MAX3233E
MAX3235E
R1OUT
T1OUT
DEVICE
T1IN
RS-232 Transceivers with Internal Capacitors
V
CC
= 3.3V (MAX3233E), V
______________________________________________________________________________________
LOGIC POWER-SUPPLY
2µs/div
VOLTAGE
CC
3.3/5
= 5.0V (MAX3235E)
3.3
(V)
5
High Data Rates
5V/div
5V/div
5V/div
SUPPLY VOLTAGE
V
(V)
3.3
3.3
CC
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.
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.
Figure 10. Loopback Test Result at 250kbps
R1OUT
T1OUT
T1IN
Interconnection with 3V and 5V Logic
V
CC
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
= 3.3V (MAX3233E), V
2µs/div
COMPATIBILITY
CC
= 5.0V (MAX3235E)
5V/div
5V/div
5V/div
11

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