HD26LS32A HITACHI

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Technical content

Quadruple Differential Line Receivers With 3 State Outputs The HD26LS32A features quadruple line receivers designed to meet the specs of EIA standard RS- 422A and RS-423. This device operates from a single 5 V power supply. The enable function is common to all four receivers and offers a choice of active high or active low input. Fail safe design ensures that if the inputs are open, the outputs will always be high. Logic Diagram Function Table Pin Arrangement Enable G VID ≤ VTL H X H X H X Output Y G X L X L X L L VID ≥ VTH X VTL < VID < VTH Differential Input A – B High level Low level Immaterial Irrelevant High impedance H L X Z H H L L H Z Enable G Enable G (Top View) VCC Enable G GND Enable G

Notes: 1. All voltage values except for differential input voltage are with respect to network ground terminal. 2. Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input. 3. The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time. Unit Recommended Operating Conditions Item Supply Voltage Differential Input Voltage Storage Temperature V V V mA Output Sink Current V Enable Input Voltage Input Voltage A or B Continuous Total Dissipation Operating Temperature Symbol VCC VIN VID VIN Tstg Iout Topr PT Ratings – 65 to 150 ±25 7.0 ±25 0 to +70 W Item Symbol Supply Voltage In Phase Input Voltage VCC VIC IOH Unit V V µA Min Typ Max 4.75 5.00 5.25 Operating Temperature IOL Output Current Topr ±7.0 – 440 mA HD26LS32A

Electrical Characteristics (Ta = 0 to +70°C) Item Symbol Min Typ Max Unit Conditions Differential Input High Threshold Voltage VTH VTL VTH–VTL VIH VOH Input Hysteresis Enable Input Voltage VIL IOZ Input Resistance Differential Input Low Threshold Voltage VIC = –7 to +7 V VOH = 2.7V, IOH = –440µA VOL = 0.4 V, IOL = 4 mA VOL = 0.45 V, IOL = 8 mA 0.2 V –0.2 –0.2 Enable Input Clamp Voltage Output Voltage VIK VOL Off State(High Impedance) Output Current Line Input Current Enable Input Current Short Circuit Output Current Supply Current II II (EN) IIH IIL ri IOS ICC VCC = 5.25V, VI = 0V(All Outputs Disable) mV VCC = 4.75 V, IIN = –18 mA VCC = 4.75V, VIL (G) = 0.8V VID = 1V, IOH = –440µA VID = –1 V, IOL = 4 mA VID = –1 V, IOL = 8 mA VCC = 5.25V VO = 2.4 V VO = 0.4 V VI = 15 V, Other Inputs–10 to +15 V VI = –15 V, Other Inputs–15 to +10 V VI = 5.5 V VI = 2.7 V VI = 0.4 V VIC = –15 to +15 V(Other Inputs AC GND) VCC = 5.25 V 2.0 0.8 –1.5 2.7 0.4 0.45 –20 2.3 –2.8 100 –0.36 9.8 –15 –85 V µA mA µA mA KΩ mA Notes: 1. All typical values are at VCC=5V, Ta=25°C,VIC=0. 2. Hysteresis is the differential between the positive going input threshold voltage and the negative going input threshold voltage. 3. Not more than one output should be shorted at a time. HD26LS32A

CL = 15 pF CL = 5 pF tLZ tHZ Switching Characteristics (VCC = 5 V, Ta = 25°C) tPHL ns tZL ns CL = 15 pF 1. tPLH, tPHL –2.5 V 2.5 V VOH VOL Input Pulse Generator 2 V 0 V 0 V 0 V 0 V Input A Input B Output 1.3 V tPHL tPLH 2.5 V –2.5 V Waveforms Test circuit Output CL 5 KΩ VCC 1.3 V 2 KΩ HD26LS32A

  1. tHZ, tZH 1.3 V 1.3 V 1.3 V 1.3 V Enable G 3 V 0 V 3 V 0 V 1.3 V ≈1.4 V 0.5 V tZH tHZ Pulse Generator Input 2 V 2.5 V Test circuit Waveforms Output CL 5 KΩ VCC 2 KΩ Enable G Output S1:Open S1:Closed 3. tLZ, tZL H Notes: 1. The pulse generator has the following characteristics : PRR=1 MHZ, 50 % duty cycle, tr ≤ 6ns, tf ≤ 6ns, Zout=50 Ω. 2. CL includes probe and jig capacitance. 3. All diodes are 1S2074 4. To test G input,ground G input and apply an inverted input waveform. 1.3 V 1.3 V 1.3 V 1.3 V Enable G 1.4 V Pulse Generator Input 2 V –2.5 V Test circuit Waveforms Output CL 5 KΩ VCC 2 KΩ Enable G Output S2:Open 1.3 V 0.5 V tLZ S2:Closed tZL VOL 3 V 0 V 3 V 0 V HD26LS32A