BL1502 CMOS 4-CH. Differential Line Receiver General Description The BL1502 is a 4-channel differential line receiver designed to meet the RS-422, RS-423, and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmission, while retaining the low power characteristics of CMOS. This device has an input sensitivity of 200 mV over the common mode input voltage range of ±7V. The BL1502 features internal pull-up and pull-down resistors that prevent output oscillation on unused channels. The BL1502 provides an enable and disable function common to all four receivers, and features 3STATE outputs with 6 mA source and sink capability. This product is pin compatible with the DS26C32T and the AM26C32. Logic Diagram： ： Features · CMOS design for low power · ±0.2V sensitivity over input common mode voltage range · Typical propagation delays: 19 ns · Typical input hysteresis: 60 mV · Inputs won’t load line when VCC = 0V · Meets the requirements of EIA standard RS-422 · TRI-STATE outputs for connection to system buses · Available in Surface Mount Connection Diagrams http://www.belling.com.cn -1Total 5 Pages 8/28/2006 Wrote by 2006 BL1502 Pin Description NO. 1，7，9，15 2，6，10，14 3，5，11，13 4 12 16 8 Name INA-,INC-,IND-,INBINA+,INC+,IND+,INB+ OUTA,OUTC,OUTD,OUTB En EnVcc GND Absolute Maximum Ratings Supply Voltage (VCC) Common Mode Range (VCM) Differential Input Voltage (V DIFF) Enable Input Voltage (V IN) Storage Temperature Range (T STG) Maximum Current Per Output Description Differential negative input Differential positive input Non-balance output Positive enable input Negative enable input ＋5V power supply Gnd 7V ±14V ±14V 7V -65°C to +150°C ±25 mA Operating Conditions Supply Voltage (VCC) 4.50 Operating Temperature Range (TA) Enable Input Rise or Fall Times Min 5.50 -40 Max V +85 Units °C 500 ns DC Electrical Characteristics VCC = 5V ±10% (unless otherwise specified) Symbol RIN Parameter Minimum Differential Input Voltage Input Resistance IIN Input Current VTH VOH VOL VIH VIL IOZ II Icc Minimum High Level Output Voltage Maximum Low Level Output Voltage Minimum Enable High Input Level Voltage Maximum Enable Low Input Level Voltage Maximum TRISTATE Output Leakage Current Maximum Enable Input Current Quiescent http://www.belling.com.cn Conditions Min VOUT= VOH or VOL -7V<VCM<+7V VIN=-7V,+7V (other input=GND) VIN=+10V Other input=GND VIN=-10V Other input=GND Vcc=Min, VDIFF=+1V IOUT=-6.0 mA Typ Max -200 35 +200 mV 5.0 6.8 10 KΩ +1.1 +1.5 mA -2.0 -2.5 mA 3.8 Vcc=Max, VDIFF=-1V IOUT=6.0 mA 4.2 0.2 V 0.3 2.0 VOUT=Vcc or GND, ENABLE=VIL, Unit V V ±0.5 0.8 V ±5.0 uA ±1.0 uA 23 mA ENABLE = VIH VIN=Vcc 或 GND Vcc=Max, -2Total 5 Pages 16 8/28/2006 Wrote by 2006 BL1502 VHYST Power Supply Current Input Hysteresis VDIFF=+1V VCM=0V 60 mV AC Electrical Characteristics Vcc=5V±10％ Symbol tPLH tPHL tRISE tFALL tPLZ tPHZ tPZL tPZH Parameter Propagation Delay Input to Output Output Rise and Fall Times Propagation Delay ENABLE to Output Propagation Delay ENABLE to Output Conditions CL=50pF VDIFF=2.5V VCM=0V CL=50pF VDIFF=2.5V VCM=0V Min 10 Typ Max Unit 19 30 ns 4 9 ns CL=50pF RL=1kΩ VDIFF=2.5V 13 22 ns CL=50pF RL=1kΩ VDIFF=2.5V 13 23 ns Test and Switching Waveforms Propagation Delay Test Circuit for TRI-STATE Output Tests http://www.belling.com.cn -3Total 5 Pages 8/28/2006 Wrote by 2006 BL1502 CL includes load and test jig capacitance. S1 = VCC for tPZL, and tPLZ measurements. S1 = Gnd for tPZH and tPHZ measurements. TRI-STATE Output Enable and Disable Waveforms Truth table Typical Applications Rt=100Ω ( When the transmission line is short, Rt could be omitted.) ·Package dimension: inches(millimeters) Narrow SOP Pin16 package http://www.belling.com.cn -4Total 5 Pages 8/28/2006 Wrote by 2006 BL1502 http://www.belling.com.cn -5Total 5 Pages 8/28/2006 Wrote by 2006