HIN232 Intersil Corporation, HIN232 Datasheet - Page 9

• Manufacturer Part Number: HIN232
• Description: +5V Powered RS-232 Transmitters/Receivers
• Manufacturer: Intersil Corporation

impedance, V
temperature. The transmitters have an internally limited output
slew rate which is less than 30V/µs. The outputs are short
circuit protected and can be shorted to ground indefinitely. The
powered down output impedance is a minimum of 300Ω with
±2V applied to the outputs and V
Receivers
The receiver inputs accept up to ±30V while presenting the
required 3kΩ to 7kΩ input impedance even if the power is off
Typical Performance Curves
FIGURE 5. V- SUPPLY VOLTAGE vs V
12
10
8
6
4
2
0
3.0
GND < T
T
V
CC
XIN
CAPACITORS
XIN
V+
CC
3.5
V-
= 4.5V, and maximum allowable operating
< V
FIGURE 2. TRANSMITTER
CC
400kΩ
4.0
9
V
4.5
CC
CC
= 0V.
300Ω
CC
Average Propagation Delay =
5.0
V- < V
, VARYING
FIGURE 4. PROPAGATION DELAY DEFINITION
R
T
OR
OUT
OUT
T
R
TOUT
T
OR
OUT
IN
IN
5.5
< V+
0.10µF
0.47µF
1µF
t
PHL
6.0
t
PHL +
t
PLH
(V
1.3V which is within the ±3V limits, known as the transition
region, of the RS-232 specifications. The receiver output is
0V to V
greater than 2.4V and high whenever the input is floating or
driven between +0.8V and -30V. The receivers feature 0.5V
hysteresis to improve noise rejection. The receiver Enable
line EN, when set to logic “1”, (HIN236, 239, 240, and 241)
disables the receiver outputs, placing them in the high
impedance mode. The receiver outputs are also placed in
the high impedance state when in shutdown mode.
2
CC
t
PLH
FIGURE 6. V+, V- OUTPUT VOLTAGE vs LOAD (HIN232)
12
10
8
6
2
0
4
= 0V). The receivers have a typical input threshold of
0
CC
-30V < R
V- (V
T
TRANSMITTER OUTPUTS
OPEN CIRCUIT
. The output will be low whenever the input is
A
= 25
CC
5
XIN
= 4.5V)
o
R
GND
V
C
XIN
CC
< +30V
V
V
OL
OL
FIGURE 3. RECEIVER
10
V+ (V
5kΩ
|I
15
LOAD
V- (V
CC
| (mA)
CC
= 5V)
20
GND < V
V+ (V
= 5V)
CC
R
25
ROUT
= 4.5V)
OUT
< V
30
CC
35