EL2252C

Features:

Fast response--7 ns
Inputs tolerate large overdrives with no speed nor bias current penalties
Propagation delay is relatively constant with variations of input Slew Rate, overdrive, temperature, and supply voltage
Output provides proper CMOS or TTL logic levels
Hysteresis is available on-chip
Large voltage gainÐ8000 V/V
Not oscillation-prone
Can detect 4 ns glitches
MIL-STD-883 Rev. C compliant


Application

Pin receiver for automatic test equipment
Data communications line receiver
Frequency counter input
Pulse squarer


Pinout




Specifications

Voltage between V+ and V-                            36V
Voltage at V+                                                  18V
Voltage between -IN and +IN pins                 36V
Output Current                                               12 mA
Current into +IN, -IN, HYS or /TTL                   5 mA
Internal Power Dissipation                             See Curves
Operating Ambient Temperature Range         -25 to +85
Operating Junction Temperature                   150
Storage Temperature Range                         -65 to +150


Description

The EL2252 dual comparator replaces the traditional input buffer+ attenuator +ECL comparator +ECL to TTL translator circuit blocks used in digital equipment. The EL2252 provides a  quick 7 ns propagation delay while complying with ±10V inputs. Input accuracy and propagation delay is maintained even with input signal Slew Rates as great as 4000 V/s. The EL2252 can run on supplies as low as -5.2V and +9V and comply with ECL and CMOS inputs, or use supplies as great as g18V for much greater input range.

The EL2252 has a /TTL pin which, when grounded, restricts the output V_OH to a TTL swing to minimize propagation delay. When left open, the output V_OH increases to a valid CMOS level.

The comparators are well behaved and have little tendency to oscillate over a variety of input and output source and load impedances. They do not oscillate even when the inputs are held in the linear range of the device. To improve output stability in the presence of input noise, an internal 60 mV of hysteresis is available by connecting the HYS pin to V-.

Elantec's products and facilities comply with MIL-I-45208A, and other applicable quality specifications. For information on Elantec's processing, see Elantec document, QRA-1; ``Elantec's Processing, Monolithic Integrated Circuits''.