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NTE7174 Integrated Circuit Quad EIA-422 Line Receiver With Three-State Outputs
Description: The NTE7174 is a Quad EIA-422/3 Receiver in a 16-Lead DIP type package that features four independent receiver chains which comply with EIA Standards for the Electrical Characteristics of Balanced/Unbalanced Voltage Digital Interface Circuits. The Receiver outputs are 74LS compatible, three-state structures which are forced to a high impedence state when the appropriate output control pin reaches a logic zero condition. A PNP device buffers each output pin to assure minimum loading for either logic one or logic zero inputs. In addition, each receiver chain has internal hysteresis circuitry to improve noise margain and discourage output instability for slowly changing input waveforms. Features: D Four Independent Receiver Chains D Three-State Outputs D High Impedance Output Control Inputs (PIA Compatible) D Internal Hysteresis - 30mV (Typ) @ Zero Volts Common Mode D Fast Propagation Times - 25ns (Typ) D TTL Compatible D Single 5V Supply Voltage Absolute Maximum Ratings: Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V Input Common Mode Voltage, VICM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input Differential Voltage, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Three-State Control Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0Vdc Output Sink Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Recommended Operating Conditions:
Parameter Power Supply Voltage Operating Ambient Temperature Input Common Mode Voltage Input Differenctial Voltage Symbol VCC TA VICR VIDR Test Conditions Min 4.75 0 -7 - Typ - - - 6 Max 5.25 70 +7 - Unit V C V V
Electrical Characteristics: (TA = +25C, VCC = 5V and VIK = 0V, Note 1, unless otherwise specified)
Parameter Input Voltage - High Logic State Input Voltage - Low Logic State Differential Input Threshold Voltage Symbol VIH VIL VTH(D) Test Conditions Three-State Control Three-State Control -7V VIC +7V, VIH = 2V, Note 2 IO = -0.4mA, VOH 2.7V IO = 8.8mA, VOH 0.5V Input Bias Current IIB(D) VCC = 0V or 5.25V Other Inputs at 0V VI = -10V VI = -3V VI = +3V VI = +10V Input Balance and Output Level VOH VOL Output Third State Leakage Current Output Short-Circuit Current Input Current - Low Logic State Input Current - High Logic State Input Clamp Diode Voltage Power Supply Current IOZ IOS lIL lIH VIK ICC -7V VIC 7.0, VIH = 2V, Note 3 IO = -0.4mA, VID =+0.4mA IO = 8.0mA, VID = -0.4V V(ID) = +3.0V, VIL = 0.8V, VOL = 0.5V V(ID) = -3.0V, VIL = 0.8V, VOH = 2.7 VI(D) = 3.0V, VIH = 2.0V, VO = 0V, Note 4 Three-State Control, VIL = 0.5V Three-State Control, VIH = 2.7V Three-State Control, VIH = 5.25V Three-State Control, lIk = -10mA VIL = 2.0V Min 2.0 - - - - - - - 2.7 - - - -15 - - - - - Typ - - - - - - - - - - - - - - - - - - Max - 0.8 0.2 -0.2 -3.25 -1.50 +1.50 +3.25 - 0.5 -40 40 -100 -100 20 100 -1.5 85 Unit V V V V mA mA mA mA V V A A mA A A A V mA
Note 1. All currents into device pins are shown as positive, out of device pins are negative. All voltages referenced to ground unless otherwise noted. Note 2. Differential input threshold voltage and guaranteed output levels are done simultaneously for worst case. Note 3. Refer to EIA-422/3 for exact conditions. Input balance and guaranteed output levels are done simultaneously for worst case. Note 4. Only one output at a time should be shorted.
Pin Connection Diagram
Input A Input A 3-State Control A/C Output C Output C Inputs C Inputs C GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC Inputs B Inputs B Output B 3-State Control B/D Output D Input D Input D
16
9
1
8
.785 (19.93) Max
.267 (6.79)
.200 (5.08)
.100 (2.54)
.147 (3.7)
.300 (7.62)

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