_______________General Description
The MAX214 +5V RS-232 transceiver provides a com-
plete, 8-line, software-configurable, DTE or DCE port
RS-232 interface. Tx, Rx, RTS, CTS, DTR, DSR, DCD,
and RI circuits can be configured as either Data
Terminal Equipment (DTE) or Data Circuit-Terminating
Equipment (DCE) using the DTE/DCE control pin. The
MAX214 eliminates the need to swap cables when
switching between DTE and DCE configurations.
________________________Applications
AT-Compatible Laptop Computers
AT-Compatible Desktop Computers
Modems, Printers, and Other Peripherals
____________________________Features
Eliminates Null Modem Cables
Programmable DTE or DCE Serial Port
1µF Charge-Pump Capacitors
116kbps Data Rate—Guaranteed
20µA Shutdown Mode
Receivers Active in Shutdown
______________Ordering Information
* Dice are specified at T
A
= +25°C.
MAX214
Programmable DTE/DCE,
+5V RS-232 Transceiver
________________________________________________________________
Maxim Integrated Products
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
MAX214
C1-
C1+
SHDN
TB
TC
RB
RC
DTE/DCE
TRB
RTB
TRC
RTC
V
CC
V+
C2+
C2-
HI-Z
N.C.
TA
RA
RDC
RE
TRA
RTA
RDTC
RRE
GND
V-
DIP/SO
__________________Pin Configuration
RTA
V
CC
TRA
TRB
RTB
TRC
RTC
RDTC
RRE
RE
RC
TC
RB
TB
RA
TA
C1+
C1-
C2+
C2-
V+
V-
15
14
9
10
20
19
18
17
11
12
5
6
25
23
24
22
7
8
27
28
1
2
16
GND
13
1µF
1µF
1µF
1µF
+5V
DTE
DTE
DCE
DTE
DTE
DCE
DTE
DTE
DCE
DTEDTE
DCE
DTE/DCE
SHDN
HI-Z
21
26
3
RDC
DCE
MAX214
1µF
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
PART TEMP. RANGE PIN-PACKAGE
MAX214CPI 0°C to +70°C 28 Plastic DIP
MAX214CWI 0°C to +70°C 28 Wide SO
MAX214C/D 0°C to +70°C Dice*
MAX214EPI -40°C to +85°C 28 Plastic DIP
MAX214EWI -40°C to +85°C 28 Wide SO
19-0199; Rev 1; 8/95
MAX214
Programmable DTE/DCE,
+5V RS-232 Transceiver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
CC
...........................................................................-0.3V to +6V
Input Voltages
T
IN
, DTE/DCE, SHDN HI-Z......................-0.3V to (V
CC
+ 0.3V)
R
IN
....................................................................................±15V
Output Voltages:
T
OUT
..................................................................................±15V
R
OUT
........................................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit (one output at a time)
T
OUT
to GND...........................................................Continuous
R
OUT
to GND...........................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
Wide SO (derate 12.50mW/°C above +70°C) ............1000mW
Operating Temperature Ranges:
MAX214C
I ..............................................0°C to +70°C
MAX214E
I ..........................................-40°C to +85°C
Storage Temperature Range......................-65°C to +150°C
Lead Temperature (soldering, 10sec) .......................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 4.5V to 5.5V, C1 to C4 = 1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETER MIN TYP MAX UNITS
Output Short-Circuit Current ±7 ±25 mA
Transmitter Output Resistance 300 300k
Output Voltage Swing ±5.0 ±7.5 V
Logic Input Pull-Up Current
11050
µA
Input Voltage Operating Range ±15 V
Positive Threshold Input Low 0.8 1.3 V
Positive Threshold Input High 1.8 2.4 V
Logic Input Threshold Low 0.8 1.4 V
Logic Input Threshold High 1.4 2.0 V
0.2 0.5 1.0 V
Negative Threshold Input Low
0.8 1.3
V
Negative Threshold Input High
1.3 2.4
V
Negative Threshold Input
Hysteresis
0.2 0.4 1.0 V
Input Resistance
100 300
k
TTL/CMOS Output Voltage Low 0.2 0.4 V
TTL/CMOS Output Voltage High 3.5 V
CC
- 0.2 V
CONDITIONS
V
CC
= 5V, normal operation, SHDN = 0V (no hysteresis
in shutdown)
V
OUT
= 0V
T
A
= +25°C, V
CC
= 5V
V
CC
= V+ = V- = 0V, V
OUT
= ±2V (Note 1)
All transmitter outputs loaded with 3kto ground
Normal operation
T
A
= +25°C, V
CC
= 5V
V
CC
= 5V, normal operation, SHDN = 0V (no hysteresis
in shutdown)
T
A
= +25°C, V
CC
= 5V, normal operation, SHDN = 0V
T
A
= +25°C, V
CC
= 5V, normal operation, SHDN = 0V
HI-Z = 5V or SHDN = 5V
I
OUT
= 3.2mA
I
OUT
= -1.0mA
Shutdown, SHDN = 5V
Shutdown, SHDN = 5V
Shutdown ±0.01 ±1
Normal operation, SHDN = 0V -2.6 -1.9
-1.5 -0.2Normal operation, SHDN = 0V
HI-Z = 0V and SHDN = 0V 357
Positive Threshold Input
Hysteresis
RS-232 TRANSMITTERS
RS-232 RECEIVERS
MAX214
Programmable DTE/DCE,
+5V RS-232 Transceiver
_______________________________________________________________________________________ 3
PARAMETER
Transmitter + to - Propagation-Delay
Difference (Normal Operation)
MIN TYP MAX
100
UNITS
Input Leakage Current
ns
±1
Receiver Propagation Delay,
RS-232 to TTL (Normal Operation)
µA
Logic Input Threshold High 1.3 2.0
V
Logic Input Threshold Low 0.8 1.3
µs
V
Receiver Propagation Delay,
RS-232 to TTL (Shutdown Mode)
Data Rate
20
kbps
1.5 10
µs
Receiver Propagation-Delay Difference
(Normal Operation)
Transition-Region Slew Rate 61230
100
V/µs
Transmitter Propagation Delay,
TTL to RS-232 (Normal Operation)
ns
1.4 3.5
µs
Transmitter Enable Time
V
CC
Supply Current
250
µs
Transmitter Disable Time 600 ns
Transmitter DTE/DCE Switch Time 600 ns
Receiver DTE/DCE Switch Time
920mA
300 ns
Receiver Termination-Resistor
Connect/Disconnect Time
Shutdown Supply Current
300 ns
420
µA
Receiver Termination-Resistor Connect
Entering SHDN Time
250
µs
Receiver Termination-Resistor
Disconnect Exiting SHDN Time
300 ns
CONDITIONS
t
PHLT
- t
PLHT
Receivers in shutdown mode
t
PLHR
t
PHL
T
- t
PLHT
T
A
= +25°C, V
CC
= 5V, R
L
= 3kto 7k,
C
L
= to 2500pF,
measured from 3V to -3V or -3V to 3V
t
PLHT
t
TEN
(includes charge-pump start-up time)
t
TTR
t
TSW
No load, T
A
= +25°C
t
RSW
(SHDN = 0V)
DTE/DCE = 0V, SHDN =
HI-Z =
V
CC
, Figure 1
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 4.5V to 5.5V, C1 to C4 = 1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
T
A
= T
MIN
to T
MAX
T
A
= +25°C
Normal operation, transmitters and receivers
t
PHLT
200 116
1.3 3.5
t
PHLR
, t
PLHR
0.4 1.5
t
PHLR
0.4 10
Note 1: The 300minimum is the EIA/TIA-232E specification, but the actual resistance when in shutdown mode or when V
CC
= 0V
is typically 300k.
50
MODE-CHANGE TIMING (DTE/DCE)
AC CHARACTERISTICS
POWER SUPPLY
CONTROL LOGIC (DTE/DCE, SHDN, HI-Z)

MAX214CWI+T

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC Prog DTE/DCE 5V RS232 Transceiver
Lifecycle:
New from this manufacturer.
Delivery:
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