MAX3235ECWP+G36

Manufacturer Part NumberMAX3235ECWP+G36
DescriptionIC TXRX RS232 DUAL250KBPS 20SOIC
ManufacturerMaxim Integrated Products
TypeTransceiver
MAX3235ECWP+G36 datasheet
 

Specifications of MAX3235ECWP+G36

Number Of Drivers/receivers2/2ProtocolRS232
Voltage - Supply4.5 V ~ 5.5 VMounting TypeSurface Mount
Package / Case20-SOIC (7.5mm Width)Propagation Delay Time Ns100 ns
Operating Supply Voltage5 VSupply Current1 uA
Operating Temperature Range0 C to + 70 CData Rate250 Kbps
Mounting StyleSMD/SMTLead Free Status / RoHS StatusLead free / RoHS Compliant
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±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
RS-232 Transceivers with Internal Capacitors
Table 1. Output Control Truth Table
OPERATION STATUS
FORCEON
Shutdown (Forced Off)
Normal Operation (Forced On)
Normal Operation
(AutoShutdown Plus)
Shutdown
(AutoShutdown Plus)
INVALID*
Normal Operation
INVALID*
Normal Operation
INVALID*
Shutdown
Normal Operation
INVALID*
(AutoShutdown)
INVALID*
Shutdown (AutoShutdown)
X = Don’t care
* INVALID connected to FORCEON
** INVALID connected to FORCEON and FORCEOFF
EDGE
T_IN
DETECT
EDGE
R_IN
DETECT
FORCEON
*AUTOSHDN IS ONLY AN INTERNAL SIGNAL.
Figure 2c. AutoShutdown Plus Logic
applied to any RS-232 receiver or transmitter input. As a
result, the system saves power without changes to the
existing BIOS or operating system.
Figures 2a and 2b depict invalid and valid RS-232
receiver voltage levels. INVALID indicates the receiver
input’s condition, and is independent of FORCEON and
FORCEOFF states. Figure 2 and Tables 1 and 2 sum-
marize the operating modes. FORCEON and FORCE-
_______________________________________________________________________________________
VALID
FORCEOFF
RECEIVER
LEVEL
X
0
X
1
1
X
0
1
X
0
1
X
1
Yes
1
X
1
No
INVALID**
Yes
INVALID**
No
FORCEOFF
FORCEOFF
S
AUTOSHDN*
30sec
TIMER
AUTOSHDN
R
*
POWERDOWN IS ONLY AN INTERNAL SIGNAL. IT CONTROLS THE OPERATIONAL
STATUS OF THE TRANSMITTERS AND THE POWER SUPPLIES.
Figure 2d. Power-Down Logic
OFF override AutoShutdown Plus circuitry. When nei-
ther control is asserted, the IC selects between these
states automatically based on the last receiver or trans-
mitter input edge received.
When shut down, the device’s charge pumps turn off,
V+ is pulled to V
transmitter outputs are high impedance. The time
required to exit shutdown is typically 100µs (Figure 7).
Rx or Tx EDGE
T_OUT
WITHIN 30sec
X
High-Z
X
Active
Yes
Active
No
High-Z
X
Active
Yes
Active
No
High-Z
X
Active
X
High-Z
FORCEON
, V- is pulled to ground, and the
CC
R_OUT
Active
Active
Active
Active
Active
Active
Active
Active
Active
POWERDOWN*
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