BL1501 BL1501 CMOS 4-CH. 3-STATE Differential Line Driver General Description The BL1501 is a 4-channel differential line driver designed for digital data transmission over balanced lines. It is designed to meet all the requirements of EIA standard RS-422 while retaining the low power characteristics of CMOS. This enables the construction of serial and terminal interfaces while maintaining minimal power consumption. The BL1501 accepts TTL or CMOS input levels and translates these to RS-422 output levels. This device uses special output circuitry that enables the drivers to power down without loading down the bus. This device has enable and disable circuitry common to all four drivers. The BL1501 is pin compatible to the DS26C31(NS) and the AM26C31(TI) . All inputs are protected against damage due to electrostatic discharge by diodes to VCC and ground. Function Block Features · · · · · · · · · TTL input compatible Typical propagation delays: 6 ns Typical output skew: 0.5 ns Outputs will not load line when VCC = 0V BL1501 meets the requirements of EIA standard RS-422 Operation from single 5V supply TRI-STATE outputs for connection to system buses Low quiescent current Available in surface mount Connection Diagrams http://www.belling.com.cn -1Total 6 Pages 8/28/2006 Wrote by 2006 BL1501 Pin description NO. Name Description 1，7，9，15 2，6，10，14 3，5，11，13 4 12 16 8 Ain，Bin，Cin，Din Aout+，Bout+，Cout+，Dout+ Aout-，Bout-，Cout-，DoutEn ～En Vcc GND Non-balance Input Balance Positive Output Balance Negative Output Positive Enable Input Negative Enable Input ＋5V power Supply Gnd Truth table： En ～En L H All other combinations of enable inputs Input Positive Output Z L H X L H Negative Output Z H L Absolute Maximum Ratings Supply Voltage (VCC) DC Input Voltage (VIN) DC Output Voltage (VOUT) Clamp Diode Current (IIK, IOK) DC Output Current, per pin (IOUT) DC VCC or GND Current, per pin (ICC) Storage Temperature Range (TSTG) This device exceeds 2000V ESD Rating. -0.5V to 7.0V -1.5V to VCC +1.5V -0.5V to 7V ±20 mA ±150 mA ±150 mA -65°C to +150°C Operating Conditions Supply Voltage (VCC) DC Input or Output Voltage(VIN, VOUT) Operating Temperature Range (TA) Input Rise or Fall Times (tr, tf) Min 4.50 0 -40 Max 5.50 VCC +85 500 Units V V °C ns DC Electrical Characteristics VCC = 5V ± 10% (unless otherwise specified) Symbol Parameter Conditions VIH High Level Input Voltage VIL Low Level Input Voltage VOH High Level VIN＝VIH or VIL http://www.belling.com.cn -2Total 6 Pages Min 2.0 2.5 Typ 3.4 Max Unit V 0.8 V V 8/28/2006 Wrote by 2006 BL1501 VOL VT VOS IIN ICC IOZ Output Voltage Low Level Output Voltage Differential Output Voltage Difference In Differential Output Common Mode Output Voltage Difference In Common Mode Output Input Current Quiescent Supply Current TRI-STATE Output Leakage Current ISC IOUT＝－20mA VIN＝VIH or VIL IOUT＝20mA RL＝100Ω 0.3 2.0 3.1 RL＝100Ω RL＝100Ω V V 0.4 V 3.0 V 0.4 V 200 ±1.0 500 uA uA 0.8 2.0 mA ±0.5 ±5.0 uA －150 mA 100 －100 uA uA Max 11 Unit ns 1.8 RL＝100Ω VIN＝Vcc,GND,VIH or VIL IOUT ＝ 0 VIN ＝Vcc or uA GND VIN ＝ 2.4V or 0.5V （Note 1） VOUT＝Vcc or GND ＝VIL ＝VIH VIN＝Vcc or GND （Note 2） Vcc ＝ VOUT＝6 V 0 V VOUT= -0.25 V 0.5 Output Short －30 Circuit Current IOFF Output Leakage Current Power Off Note 1：Measured per input. All other inputs at VCC or GND. Note 2：Short one output each time. Switching Characteristics VCC = 5V ±10%, tr = 6 ns, tf = 6 ns Symbol Parameter TPLH，TPHL Propagation Delays Input to Output Skew Skew is defined as the difference in propagation delays between complementary outputs at the 50% point. TTLH，TTHL Differential Output Rise And Fall Times TPZH Output Enable Time TPZL Output Enable Time TPHZ Output Disable Time TPLZ Output Disable Time CPD Power Dissipation Capacitance http://www.belling.com.cn Conditions S1 Open Min 2 Typ 6 S1 Open 0.5 2.0 ns S1 Open 6 10 ns 11 13 5 7 50 19 21 9 11 ns ns ns ns pF S1 S1 S1 S1 Close Close Close Close -3Total 6 Pages 8/28/2006 Wrote by 2006 BL1501 CIN Input Capacitance 6 pF AC Test Circuit： Circuit： AC Test Circuit Note: C1 = C2 = C3 = 40 pF (Including Probe and Jig Capacitance), R1 = R2 = 50 Ω, R3 = 500Ω. Wave Form Propagation Delays 50% Output Skew Output 50% Skew http://www.belling.com.cn -4Total 6 Pages 8/28/2006 Wrote by 2006 BL1501 Differential Rise and Fall Times Enable and Disable Times ·Typical Applications: Rt=100 Ω ( When the transmission line is short, Rt could be omitted.) ·Package dimension: inches (millimeters) Narrow SOP Pin16 package http://www.belling.com.cn -5Total 6 Pages 8/28/2006 Wrote by 2006 BL1501 http://www.belling.com.cn -6Total 6 Pages 8/28/2006 Wrote by 2006