MAX13235EEVKIT+ Maxim Integrated, MAX13235EEVKIT+ Datasheet - Page 3

• Manufacturer Part Number: MAX13235EEVKIT+
• Description: RS-232 Interface IC 3Mbps RS-232 Transceivers with Low-Voltage Interface
• Manufacturer: Maxim Integrated
• Series: MAX13234E, MAX13235E, MAX13236E, MAX13237Er

Specifications of MAX13235EEVKIT+

• Data Rate: 3 Mbps
• Operating Supply Voltage: 3 V to 5.5 V
• Supply Current: 1 mA
• Operating Temperature Range: - 40 C to + 85 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

Table 1. MAX13235E EV Kit Jumper Descriptions
7) Connect the DB9 I/O extension cable between the
8) Start the RealTerm software by opening its icon in
9) In the RealTerm window, click in the display area
10) Move the shunt on jumper JU2 to pins 2-3 to dis-
11) In the RealTerm window, click in the display area
* Default position.
EV kit and the computer’s serial port.
the Start | Programs menu. The RealTerm software
main window appears, as shown in Figure 1. Note:
If the serial cable is connected to a serial port other
than COM1, bring up the Port tab and open the
corresponding serial port.
and type on the keyboard. The digital loopback
connection immediately relays each character from
the receiver to the transmitter, so each character
typed on the keyboard appears in the display area.
able the MAX13235E.
and type on the keyboard. With the MAX13235E
disabled, characters typed on the keyboard do not
appear in the display area.
JUMPER
JU1
JU2
JU3
JU4
JU5
JU6
J2
_______________________________________________________________________________________
RS-232 Loopback
Digital Loopback
FORCEOFF
FORCEON
SIGNAL
T1IN
T2IN
SHUNT POSITION
Open*
Open*
Open*
Open*
Open*
Open*
1-2*
1-2*
2-3
2-3
1-2
2-3
1-2
2-3
1-2
1-2
1-3
5-7
MAX13235E Evaluation Kit
FORCEON = VL
FORCEON = GND
FORCEOFF = VL
FORCEOFF = GND
T1IN connects to pin 1 of J2 connector
T1IN = VL
T1IN = GND
T2IN connects to pin 7 of J2 connector
T2IN = VL
T2IN = GND
R1IN is driven by T1OUT from U1. Data received from digital side
loops back at RS-232 connection.
R1IN is not connected to T1OUT
R2IN is driven by T2OUT from U1. Data received from digital side
loops back at RS-232 connection.
R2IN is not connected to T2OUT
T1IN is driven by R1OUT from U1. Data received from RS-232 side
loops back at digital connection.
T1IN is not connected to R1OUT
T2IN is driven by R2OUT from U1. Data received from RS-232 side
loops back at digital connection.
T2IN is not connected to R2OUT
The MAX13235E EV kit provides a proven design to
evaluate the MAX13235E, a 3Mbps RS-232 transceiver
with low-voltage interface and enhanced ESD protec-
tion. Capacitors C3–C6 are used by the charge pump
to generate the V+ and V- supplies from VCC.
Header J2 provides the digital connections to the
MAX13235E. Header J2 also allows digital loopback by
placing shunts across pins 1-3 and 5-7.
Jumpers JU1 and JU2 control the MAX13235E power-
management signals. Jumpers JU3 and JU4 can be
used to set the logic level of T1IN and T2IN. Jumpers
JU5 and JU6 allow RS-232 loopback.
The MAX13235E EV kit features a dual-row (2 x 4) 8-pin
header (J2) for interfacing with logic signals. The J2
header and a DB9 connector (J1) are available to inter-
face with an RS-232 serial line.
Detailed Description of Hardware
DESCRIPTION
EV Kit I/O Connections
Jumpers
3