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PDF HIN230IB Data sheet ( Hoja de datos )
| Número de pieza | HIN230IB | |
| Descripción | +5V Powered RS-232 Transmitters/Receivers | |
| Fabricantes | Intersil Corporation | |
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TM
Data Sheet
HIN230 thru HIN241
May 2000 File Number 3138.7
+5V Powered RS-232
Transmitters/Receivers
The HIN230-HIN241 family of RS-232 transmitters/receivers
interface circuits meet all ElA RS-232E and V.28 specifications,
and are particularly suited for those applications where ±12V is
not available. They require a single +5V power supply (except
HIN231 and HIN239) and feature onboard charge pump
voltage converters which generate +10V and -10V supplies
from the 5V supply. The HIN233 and HIN235 require no
external capacitors and are ideally suited for applications where
circuit board space is critical. The family of devices offer a wide
variety of RS-232 transmitter/receiver combinations to
accommodate various applications (see Selection Table).
The drivers feature true TTL/CMOS input compatibility, slew-
rate-limited output, and 300Ω power-off source impedance.
The receivers can handle up to ±30V, and have a 3kΩ to 7kΩ
input impedance. The receivers also feature hysteresis to
greatly improve noise rejection.
Features
• Meets All RS-232E and V.28 Specifications
• Requires Only Single +5V Power Supply
- (+5V and +12V - HIN231 and HIN239)
• High Data Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . 120kbps
• HIN233 and HIN235 Require No External Capacitors
• Onboard Voltage Doubler/Inverter
• Low Power Consumption
• Low Power Shutdown Function
• Three-State TTL/CMOS Receiver Outputs
• Multiple Drivers
- ±10V Output Swing for 5V lnput
- 300Ω Power-Off Source Impedance
- Output Current Limiting
- TTL/CMOS Compatible
- 30V/µs Maximum Slew Rate
• Multiple Receivers
- ±30V Input Voltage Range
- 3kΩ to 7kΩ Input Impedance
- 0.5V Hysteresis to Improve Noise Rejection
Applications
Selection Table
PART
NUMBER
HIN230
HIN231
HIN232
HIN233
HIN234
HIN235
HIN236
HIN237
HIN238
HIN239
HIN240
HIN241
POWER SUPPLY
VOLTAGE
+5V
+5V and +7.5V to 13.2V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V and +7.5V to 13.2V
+5V
+5V
NUMBER OF
RS-232
DRIVERS
5
2
2
2
4
5
4
5
4
3
5
4
• Any System Requiring RS-232 Communication Ports
- Computer - Portable, Mainframe, Laptop
- Peripheral - Printers and Terminals
- Instrumentation
- Modems
NUMBER OF
RS-232
RECEIVERS
0
2
2
2
0
5
3
3
4
5
5
5
EXTERNAL
COMPONENTS
4 Capacitors
2 Capacitors
4 Capacitors
None
4 Capacitors
None
4 Capacitors
4 Capacitors
4 Capacitors
2 Capacitors
4 Capacitors
4 Capacitors
LOW POWER
SHUTDOWN/TTL
THREE-STATE
Yes/No
No/No
No/No
No/No
No/No
Yes/Yes
Yes/Yes
No/No
No/No
No/Yes
Yes/Yes
Yes/Yes
NUMBER OF
LEADS
20
16
16
20
16
24
24
24
24
24
44
28
3-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000
1 page  
HIN230 thru HIN241
Pinouts (Continued)
HIN234 (SOIC)
TOP VIEW
HIN235 (PDIP)
TOP VIEW
T1OUT 1
T2OUT 2
T2IN 3
T1IN 4
GND 5
VCC 6
C1+ 7
V+ 8
16 T3OUT
15 T4OUT
14 T4IN
13 T3IN
12 V-
11 C2-
10 C2+
9 C1-
+5V
1µF
1µF
T1IN
6
7
+ C1+
VCC
9 +5V TO 10V
C1- VOLTAGE DOUBLER
10
+ C2+
+10V TO -10V
11
C2-
VOLTAGE INVERTER
+5V T1
4 400kΩ
V+ 8
V- 12
1
1µF
+
1µF
+
T1OUT
T2IN
+5V T2
3 400kΩ
2 T2OUT
T3IN
+5V
13 400kΩ
T3
16 T3OUT
T4IN
+5V
14 400kΩ
T4
15 T4OUT
5
T4OUT 1
T3OUT 2
T1OUT 3
T2OUT 4
R2IN 5
R2OUT 6
T2IN 7
T1IN 8
R1OUT 9
R1IN 10
GND 11
VCC 12
24 R3IN
23 R3OUT
22 T5IN
21 SHUTDOWN
20 EN
19 T5OUT
18 R4IN
17 R4OUT
16 T4IN
15 T3IN
14 R5OUT
13 R5IN
T1IN
T2IN
T3IN
T4IN
T5IN
R1OUT
R2OUT
R3OUT
R4OUT
+5V
12
+5V
8 400kΩ
VCC
T1
+5V T2
7 400kΩ
+5V T3
15 400kΩ
+5V
16 400kΩ
T4
+5V
22 400kΩ
9
T5
R1
6
R2
23
R3
17
R4
0.1µF
+
3
T1OUT
4
2
1
19
10
5kΩ
5
5kΩ
24
5kΩ
18
5kΩ
T2OUT
T3OUT
T4OUT
T5OUT
R1IN
R2IN
R3IN
R4IN
R5OUT
EN
14
20
13
R5
5kΩ
21
GND
11
R5IN
SHUTDOWN
3-5
5 Page 
HIN230 thru HIN241
VCC
GND
VOLTAGE DOUBLER
S1 C1+ S2
+
C1
-
S3 C1- S4
RC
OSCILLATOR
V+ = 2VCC
VOLTAGE INVERTER
S5 C2+ S6
+
C3
-
VCC
GND
S7
+
C2
-
C2- S8
+
C4
-
GND
V- = -(V+)
FIGURE 1. CHARGE PUMP
Detailed Description
The HIN230 thru HIN241 family of RS-232
transmitters/receivers are powered by a single +5V power
supply (except HIN231 and HIN239), feature low power
consumption, and meet all ElA RS-232C and V.28
specifications. The circuit is divided into three sections: The
charge pump, transmitter, and receiver.
Charge Pump
An equivalent circuit of the charge pump is illustrated in Figure
1. The charge pump contains two sections: the voltage
doubler and the voltage inverter. Each section is driven by a
two phase, internally generated clock to generate +10V and -
10V. The nominal clock frequency is 16kHz. During phase one
of the clock, capacitor C1 is charged to VCC. During phase
two, the voltage on C1 is added to VCC, producing a signal
across C3 equal to twice VCC. During phase one, C2 is also
charged to 2VCC, and then during phase two, it is inverted
with respect to ground to produce a signal across C4 equal to
-2VCC. The charge pump accepts input voltages up to 5.5V.
The output impedance of the voltage doubler section (V+) is
approximately 200Ω, and the output impedance of the voltage
inverter section (V-) is approximately 450Ω. A typical
application uses 1µF capacitors for C1-C4, however, the value
is not critical. Increasing the values of C1 and C2 will lower the
output impedance of the voltage doubler and inverter,
increasing the values of the reservoir capacitors, C3 and C4,
lowers the ripple on the V+ and V- supplies.
During shutdown mode (HIN230, 235, 236, 240 and 241),
SHUTDOWN control line set to logic “1”, the charge pump is
turned off, V+ is pulled down to VCC, V- is pulled up to GND,
and the supply current is reduced to less than 10µA. The
transmitter outputs are disabled and the receiver outputs are
placed in the high impedance state.
Transmitters
The transmitters are TTL/CMOS compatible inverters which
translate the inputs to RS-232 outputs. The input logic
threshold is about 26% of VCC, or 1.3V for VCC = 5V. A logic 1
at the input results in a voltage of between -5V and V- at the
output, and a logic 0 results in a voltage between +5V and (V+ -
0.6V). Each transmitter input has an internal 400kΩ pullup
resistor so any unused input can be left unconnected and its
output remains in its low state. The output voltage swing meets
the RS-232C specifications of ±5V minimum with the worst
case conditions of: all transmitters driving 3kΩ minimum load
impedance, VCC = 4.5V, and maximum allowable operating
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 VCC = 0V.
V+
VCC
400kΩ
TXIN
GND < TXIN < VCC
300Ω
TOUT
V- < VTOUT < V+
V-
FIGURE 2. TRANSMITTER
Receivers
The receiver inputs accept up to ±30V while presenting the
required 3kΩ to 7kΩ input impedance even if the power is off
(VCC = 0V). The receivers have a typical input threshold of
1.3V which is within the ±3V limits, known as the transition
region, of the RS-232 specifications. The receiver output is
0V to VCC. The output will be low whenever the input is
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”, (HIN235, 236, 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.
VCC
RXIN
-30V < RXIN < +30V
5kΩ
ROUT
GND < VROUT < VCC
GND
FIGURE 3. RECEIVER
3-11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HIN230IB.PDF ] | |
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