Datasheet

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
= 3kΩ to 7kΩ,
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 300Ω minimum is the EIA/TIA-232E specification, but the actual resistance when in shutdown mode or when V
CC
= 0V
is typically 300kΩ.
50
MODE-CHANGE TIMING (DTE/DCE)
AC CHARACTERISTICS
POWER SUPPLY
CONTROL LOGIC (DTE/DCE, SHDN, HI-Z)