RC7321

The RC7321 is a low cost pin electronics driver designed for use in all high speed ATE systems which require pin drivers with three state capability and high slew rates. The RC7321 has the ability to drive a 509 transmission line of up to 2 feet in length with a slew rate of 1.2 V/ns and repetition rate of over 250 MHz for ECL output levels. These features, combined with a maximum output swing of 9.5 Vp-p over the range of -2.5v to +7v, provide this circuit with the ability to test TTL, CMOS, ECL and GaAs devices. The high and low limits of the output swing are set through the program pins VH and VL, respectively. The transfer characteristic from the program pins to the output pin is unity gain with very low offset drift. The VH and VL inputs have been buffered to operate with low bias currents (1 A typical) allowing direct coupling to the output of a DAC. When the RC7321 is used on an I/O pin, it may be forced into the high impedance state through the INH+ and INH- differential inputs. In the high impedance state, excellent isolation is provided between the output of the disabled driver and the pin by virtue of low driver output capacitance (3.0 pF typical) and low output leakage (10 nA typical). The RC7321 is provided with high speed differential ECL inputs for ease of interface with the differential ECL outputs of a timing generator. The inputs have a voltage range of -2v to +6v, so that if required, an input may be driven by TTL or CMOS devices provided that the other input is tied to the appropriate threshold value. The pin driver is available in unterminayed configuration.

The features of RC7321 can be summarized as (1)high output slew rate (1.3 V/ns typical); (2)wide output voltage range to and up to 9.2 Vp-p swings; (3)three-state/high impedance output; (4)high repetition rate (250 MHz for ECL swings); (5)low output offset (40 mV typical) and output offset drift (0.1 mV/°C typical).; (6)low leakage (10 nA typical) and low output capacitance (3 pF typical) in high impedance inhibit mode; (7)high speed differential inputs with wide common mode range for ease of interface to ECL as well as TTL and CMOS levels; (8)output short circuit protection (safe operating area protection with current limiting and thermal shutdown); (9)100 mA typical dynamic current drive capability; (10)absolute slew rate control; (11)available in 28-pin PLCC.

The absolute maximum ratings of RC7321 are (1)positive power supply, Vcc: +13V; (2)negative power supply, VEE :-8.2V; (3)difterence between Vcc and VEE: 16V; (4)input voltage at VIN+, VNH+: VCC-12V, VEE+12V; (5)input voltage at VH-, VL-: VCC-13, VEE+13V; (6)differential input voltage |VlN+ - VlN-, | VlNH+ - VINH-|: 6V; (7)operating temperature range: 0°C to 70°C; (10)storage temperature range:-65 °C to +125°C; (11)lead temperature range (solder 10 sec): 300°C.