The HIN202 , HIN206, HIN207, HIN208, HIN211, HIN213RS-232 transmitter/receiver interface circuit series conforms to all ElA RS-232E and V.28 specifications, and is especially suitable for ± 12V available. They require a +5V supply and have built-in charge pump voltage converters to generate +10V and -10V supplies from the 5V supply. This family of devices offers a variety of RS-232 transmitter/receiver combinations to suit various applications (see selection table). The HIN206, HIN211, and HIN213 feature a low-power shutdown mode to save battery-powered energy applications. In addition, the HIN213 provides two active receivers in shutdown mode for easy "wake up" capability. The driver features true TTL/CMOS input compatibility, slew rate limited output, and 300 Ω supply impedance. The receiver can handle inputs up to ±30V and has 3kΩ to 7kΩ input impedance. The receiver also has hysteresis which greatly improves noise rejection.

application

Any system that requires an RS-232 communication port - Laptops, Mainframes, Notebooks - Peripherals - Printers and Terminals - Meters - Modems

feature

Offers lead-free plus annealed (RoHS compliant) compliance with all RS-232E and V.28 specifications requiring only 0.1µF or larger external capacitors for high data rates. 120kbit/s Two receivers active in shutdown mode (HIN213) Only one +5V power supply is required on-board voltage multiplier/inverter Low power consumption (typ.). 5mA low power shutdown function (typ.). 1 µA tri-state TTL/CMOS receiver output

Multiple Drivers - +5V Input ±10V Output Swing - 300Ω Power Off Impedance - Output Current Limiting - TTL/CMOS Compatible - 30V/µs Maximum Slew Rate

Multiple receivers - 0V input voltage range - 3kΩ to 7kΩ input impedance - 0.5V hysteresis for improved noise rejection

Absolute Maximum Ratings Thermal Information

V CC is grounded. (Ground -0.3V)

V+ is grounded. (V CC-0.3V)

V-ground. -12V

Input voltage T in. -0.3V

output voltage output. (V--0.3V)

Short circuit duration output. Continuous R output. Continuous electrostatic discharge classification. Primary Operating Conditions Temperature Range

HIN2XCx Inc. 0°C to 70°CHIN2XXIX. -40°C to 85°C Thermal Resistance (Typical, Note 1) θJA (Celsius/Watt) Maximum Junction Temperature (Plastic Package). 150 degrees Celsius maximum storage temperature range. -65°C to 150°C maximum lead temperature (10s for soldering). 300 degrees Celsius (SOIC and SSOP - lead only)

CAUTION: Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a pressure rating and operation of the device under the above or any other conditions stated in the operating section of this specification is not implied.

Note:

1. θJA is measured in free air with components mounted on an inefficient thermal conductivity test board.

Electrical specification test conditions: V CC=+5V±10%, (V CC=+5V±5%, HIN207); C1-C4=0.1μF; TA=operating temperature range

Electrical specification test conditions: V CC=+5V±10%, (V CC=+5V±5%, HIN207); C1-C4=0.1μF; TA=operating temperature range (continued)

Detailed description

The HIN202, HIN206, HIN207, HIN208, HIN211, HIN213RS-232 transmitter/receiver series features low power consumption from a single +5V supply and is compliant with all ElA RS232C and V.28 specifications. The circuit is divided into three parts: the charge pump, the transmitter, and the receiver. The equivalent circuit of the charging pump is shown in Figure 1. The priming pump consists of two parts: a voltage multiplier and a voltage inverter. Each section is driven +10V and -10V by a two-phase internally generated clock. The nominal clock frequency is 125kHz. During the first phase of the clock, capacitor C1 is charged to five milliliters. In the second stage, the voltage on C1 is applied to V CC, producing a signal equal to two V CC through C3. In the second stage, C2 also charges to 2V CC, then in the first stage, as opposed to ground, producing a signal on C4 equal to -2V CC. The charge pump accepts input voltages up to 5.5V. The output impedance of the voltage multiplier section (V+) is about 200Ω, and the output impedance of the voltage inverter section (V-) is about 450Ω. Typical applications use 0.1µF however, the value of capacitors C1-C4 is not critical. Increasing the value of C1 and C2 will reduce the impedance of the output doubler and inverter, and increasing the value of the reservoir capacitors C3 and C4 will reduce the ripple on the V+ and V- supplies. In shutdown mode (HIN206 and HIN211, SD=V CC, HIN213, SD=0V) the charge pump is turned off, V+ is pulled down to V CC, V- is pulled up to GND, and the supply current is reduced to less than 10 microamps. Transmitter outputs are disabled and receiver outputs (except HIN213, R4 and R5) are in a high impedance state.

transmitter

The transmitter is a TTL/CMOS compatible inverter converting the input to an RS-232 output. The input logic threshold is approximately 26% of Vcc, or 1.3V at Vcc=5V. A 1 at the logic input results in a voltage 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 pull-up resistor to leave any unused input unconnected and its output held low. This output voltage swing meets the minimum ±5V, worst case: all transmitters drive 3kΩ minimum load impedance, Vcc=4.5V, maximum allowable operating temperature. The transmitter has an internally limited output slew rate of less than 30V/µs. The output is short-circuit protected and can be shorted to ground indefinitely. This power-down output impedance is a minimum of 300Ω and ±2V is applied to the output, V CC = 0V.

receiver

The receiver input accepts voltages up to ±30V, while showing that even with power disconnected, an input impedance of 3kΩ to 7kΩ is required (V CC = 0 volts). The receiver's typical input threshold is 1.3V, within the ±3V range, called the transition region, and falls under the RS-232 specification. The receiver output is 0V to V CC. When the input is greater than 2.4V, when the input is floating or driven between +0.8V and -30V. The receiver features 0.5V hysteresis (except during shutdown) to improve noise rejection. When the receiver enable lines (EN and HIN211 on HIN206, EN on HIN213) are not set, the receiver output is disabled, putting it in high impedance mode. The receiver outputs are also put into high impedance state when in shutdown mode (except HIN213 R4 and R5).

HIN213 shutdown operation

HIN213 has two receivers R4 and R5 which remain active in shutdown mode. Receiver propagation delay is typically 0.5 microseconds during normal operation. During shutdown, the propagation delay may increase slightly. When entering shutdown mode, the receiver R4 and R5SD=V IL after 80 microseconds are invalid. Exiting the power-off mode, all receiver outputs will be inactive until the charge pump circuit reaches normal operating voltage. This is typically less than 2ms when using a 0.1µF capacitor.

application information

HIN2XX can be used for all RS-232 data terminals and communication links. It is especially useful in applications where the ±12V power supply is not available in conventional RS-232 interface circuits. The application shows a typical interface configuration. A simple duplex RS-232 port with CTS/RTS handshake is shown in Figure 9. Fixed output signals such as DTR (Data Terminal Ready) and DSR (Data Signaling Rate Select) are generated by driving them through a 5kW resistor connected to V+. In applications requiring four RS-232 inputs and outputs (Figure 10), note that each circuit requires two charge pump capacitors (C1 and C2), but can share the reservoir capacitors (C3 and C4). The shared benefit of the storage capacitor is the elimination of both capacitors and the reduction of the charge pump source impedance effectively increases the transmitter output swing.