SN75LBC776

Positive supply voltage range, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 0.5 to 7 V
Negative supply voltage range, V_EE (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 to 0.5 V
Receiver input voltage range (RA, RB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V to 15 V
Receiver differential input voltage range, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 12 to 12 V
Receiver output voltage range (RY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.5 V to 5.5 V
Driver output voltage range (Power Off) (DY1, DY2, DZ2) . . . . . . . . . . . . . . . . . . . . . 15 V to 15 V
Driver output voltage range (Power On) (DY1, DY2, DZ2) . . . . . . . . . . . . . . . . . . . . . 11 V to 11 V
Driver input voltage range (DA, SHND, DEN) . . . . . . . . . . . . . . . . . . . . .  . . . . 0.5 V to V_CC+ 0.4 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . .. . See Dissipation Rating Table
Electrostatic discharge (see Note 2): (Bus terminals), Class 3, A . . . . . . . . . . . . . . .  . . . . . . . . 6 kV
                                                          (Bus terminals), Class 3, B . . . . . . . . . . . . . . . . . . . .  . . 500 V
                                                          (All terminals), Class 3, A . . . . . . . . . . . . . . . . . . . . .. . . . 6 kV
                                                          (All terminals), Class 3, B . . . . . . . . . . . . . . . . . . . . .. . . 500 V
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . 0°C to 70°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . .. . . . 260°C

† 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 under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to network ground terminal unless otherwise noted.
2. This parameter is measured in accordance with MIL-STD-883C, Method 3015.7.

The SN75LBC776 is a low-power LinBiCMOS device that incorporates the drivers and receivers for a 9-pin GeoPort host interface. GeoPort combines hybrid EIA/TIA-422-B and EIA/TIA-423-B drivers and receivers to transmit data up to four megabits per second (Mbit/s) full duplex. GeoPort is a serial communications standard that is intended to replace the RS-232, Appletalk, and LocalTalk printer ports all in one connector in addition to providing real-time data transfer capability. It provides point-to-point connections between GeoPort-compatible devices with data transmission rates up to 4 Mbit/s full duplex and a hot-plug feature. Applications include connection to telephony, integrated services digital network (ISDN), digital sound and imaging, fax-data modems, and other serial and parallel connections. The GeoPort is backwardly compatible to both LocalTalk and AppleTalk.

While the SN75LBC776 is powered-off (V_CC= 0) the outputs are in a high-impedance state. When the shutdown (SHDN) terminal is high, the charge pump is powered down and the outputs are in a high-impedance state. The driver enable (DEN) terminal sends the outputs of the differential driver into a high-impedance state with a high input signal. All drivers and receivers have fail-safe mechanisms to ensure a high output state when the inputs are left open.

A switched-capacitor voltage converter generates the negative voltage required from a single 5-V supply using four 0.1-mF capacitors, two capacitors between the C+ and C- terminals and two capacitors between V_EE and ground.The SN75LBC776 is characterized for operation over the 0°C to 70°C temperature range.