MAX13234EEUP+ Maxim Integrated Products, MAX13234EEUP+ Datasheet - Page 14

TXRX RS-232 250KBPS 2X2 20TSSOP

MAX13234EEUP+

Manufacturer Part Number
MAX13234EEUP+
Description
TXRX RS-232 250KBPS 2X2 20TSSOP
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX13234EEUP+

Number Of Drivers/receivers
2/2
Protocol
RS232
Voltage - Supply
3 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
3Mbps RS-232 Transceivers with
Low-Voltage Interface
The MAX13234E–MAX13237E maintain the RS-232 ±5V
minimum transmitter output voltage even at high data
rates. Figure 11 shows a transmitter loopback test cir-
cuit. Figure 12 shows a loopback test result at
120kbps, and Figure 13 shows the same test at 3Mbps.
Figure 11. Loopback Test Circuit
14
C1
C2
V
*C3 CAN BE RETURNED TO V
CC
______________________________________________________________________________________
C
BYPASS1
FORCEON
FORCEOFF
C1+
C1-
C2+
C2-
T_IN
R_OUT
1.62V to V
V
CC
L
MAX13236E
MAX13237E
OR GND.
CC
GND
V
V
CC
CC
High Data Rates
5kΩ
T_OUT
R_IN
V+
V-
C
BYPASS2
C3*
C4
1000pF
In Figure 12, all transmitters were driven simultaneously
at 120kbps into RS-232 loads in parallel with 1000pF.
In Figure 13, a single transmitter was driven at 3Mbps,
and all transmitters were loaded with an RS-232 receiv-
er in parallel with 150pF.
Figure 12. Loopback Test Results at 120kbps
Figure 13. Loopback Test Results at 3Mbps
PROCESS: BiCMOS
R1OUT
T1OUT
R1OUT
T1OUT
T1IN
T1IN
V
V
CC
CC
= 3.3V
= 3.3V
100ns/div
2µs/div
Chip Information
3.3V/div
5V/div
3.3V/div
3V/div
5V/div
5V/div

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