DS3896_09 NSC | Alldatasheet
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■ 8 bit DS3896 transceiver provides high package density ■ 4 bit DS3897 transceiver provides separate driver input and receiver output pins ■ BTL compatible ■ Less than 5 pF output capacitance for minimal bus loading ■ 1 Volt bus signal swing reduces power consumption ■ Trapezoidal driver waveforms (tr, tf ≃ 6 ns typical) reduce noise coupling to adjacent lines ■ Temperature insensitive receiver thresholds track the bus logic high level to maximize noise immunity in both high and low states ■ Guaranteed A.C. specifications on noise immunity and propagation delay over the specified temperature and supply voltage range ■ Open collector driver output allows wire-or connection ■ Advanced low power schottky technology ■ Glitch free power up/down protection on driver and receiver outputs ■ TTL compatible driver and control inputs and receiver outputs Trapezoidal™ is a trademark of National Semiconductor Corporation. © 2009 National Semiconductor Corporation 8510 www.national.com
8510 Version 6 Revision 2 Print Date/Time: 2009/07/20 16:46:54
DS3896/DS3897 BTL Trapezoidal Transceivers
DS3896N, M 851001 DS3897N, M 851002 Order Numbers DS3896M, DS3896N, DS3897M or DS3897N See NS Package Number M20B or N20A www.national.com 2
Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 6V Control Input Voltage 5.5V Driver Input and Receiver Output 5.5V Receiver Input and Driver Output 2.5V Power Dissipation at 70°C N Package 1480 mW M Package TBD mW Storage Temperature Range −65°C to +150°C Lead Temperature (Soldering, 4 sec.) 260°C Recommended Operating Conditions Min Max Units Supply Voltage, VCC 4.75 5.25 V Bus Termination Voltage 1.90 2.10 V Operating Free Air Temperature 0 70 °C Electrical Characteristics: (Notes 2, 3) (0°C ≤ TA ≤ 70°C, 4.75V ≤ VCC ≤ 5.25V unless otherwise specified) Symbol Parameter Conditions Min Typ Max Units Driver and Control Inputs: (An, Dn, En, CD, T/R , RE , TE ) VIH Logical “1” Input Voltage 2.0 V VIL Logical “0” Input Voltage 0.8 V II Logical “1” Input Current An = Dn = En = VCC 1 mA IIH Logical “1” Input Current An = Dn = En = 2.4V 40 μA IIHC Logical “1” Input Current CD = T/R = RE = TE = 2.4V 80 μA IIL Logical “0” Input Current An = Dn = En = 0.4V −1 −1.6 mA IILC Logical “0” Input Current CD = T/R = RE = TE = 0.4V −180 −400 μA VCL Input Diode Clamp Voltage Iclamp = −12 mA −0.9 −1.5 V Driver Output/Receiver Input: (Bn) VOLB Low Level Bus Voltage An = Dn = En = T/R = 2V, VL = 2V 0.75 1.0 1.2 V RL = 18.5Ω, CD = TE = 0.8V (Figure 1) IIHB Maximum Bus Current (Power On) An = Dn = En = 0.8V, VCC = 5.25V 10 100 μA Bn = 2V IILB Maximum Bus Current (Power Off) An = Dn = En = 0.8V, VCC = 0V 100 μA Bn = 2V VTH Receiver Input Threshold VCC = 5V 1.47 1.55 1.62 V Receiver Output: (An, Rn) VOH Logical “1” Output Voltage Bn = 1.2V, IOH = −400 μA 2.4 3.2 V CD = T/R = RE = 0.8V VOL Logical “0” Output Voltage Bn = 2V, IOL = 16 mA 0.35 0.5 V CD = T/R = RE = 0.8V IOS Output Short Circuit Current Bn = 1.2V −20 −70 −100 mA CD = T/R = RE = 0.8V ICC Supply Current (DS3896) VCC = 5.25V 90 135 mA ICC Supply Current (DS3897) VCC = 5.25V 50 80 mA Note 1: “Absolute maximum ratings” are those beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The table of “Electrical Characteristic” provide conditions for actual device operation. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. Note 3: All typicals are given for VCC = 5V and Ta = 25°C. DS3896 Switching Characteristics (0°C ≤ TA ≤ 70°C, 4.75V ≤ VCC ≤ 5.25V unless otherwise specified) Symbol Parameter Conditions Min Typ Max Units Driver: tDLH An to Bn CD = 0.8V, T/R = 2.0V, VL = 2V 5 9 15 ns tDHL (Figure 2) 5 9 15 ns 3 www.national.com
Symbol Parameter Conditions Min Typ Max Units Driver: tDLHC CD to Bn An = T/R = 2.0V, VL = 2V 5 10 18 ns tDHLC (Figure 2) 5 12 20 ns tDLHT T/R to Bn VCI = An, VC = 5V, ( Figure 5) 5 15 25 ns tDHLT CD = 0.8V, RC = 390Ω, CL = 30 pF 5 22 35 ns RL1 = 18Ω, RL2 = NC, VL = 2V tR Driver Output Rise Time CD = 0.8V, T/R = 2V, VL = 2V 3 6 10 ns tF Driver Output Fall Time (Figure 2) 3 6 10 ns Receiver: tRLH Bn to An CD = 0.8V, T/R = 0.8V 5 12 18 ns tRHL (Figure 3) 5 10 18 ns tRLZC CD to An Bn = 2.0V, T/R = 0.8V, CL = 5 pF 5 10 18 ns RL1 = 390Ω, RL2 = NC, VL = 5V ( Figure 4) tRZLC Bn = 2.0V, T/R = 0.8V, CL = 30 pF 5 8 15 ns RL1 = 390Ω, RL2 = 1.6k, VL = 5V ( Figure 4) tRHZC Bn = 0.8V, T/R = 0.8V, VL = 0V, 2 4 8 ns RL1 = 390Ω, RL2 = NC, CL = 5 pF (Figure 4) tRZHC Bn = 0.8V, T/R = 0.8V, VL = 0V, 3 7 12 ns RL1 = NC, RL2 = 1.6k, CL = 30 pF ( Figure 4) tRLZT T/R to An VCI = Bn, VC = 2V, RC = 18Ω, 5 10 18 ns CD = 0.8V, VL = 5V, RL1 = 390Ω, RL2 = NC, CL = 5 pF ( Figure 5) tRZLT VCI = Bn, VC = 2V, RC = 18Ω, 14 24 40 ns CD = 0.8V, VL = 5V, RL1 = 390Ω, RL2 = 1.6k, CL = 30 pF ( Figure 5) tRHZT VCI = Bn, VC = 0V, RC = 18Ω, 2 4 8 ns CD = 0.8V, VL = 0V, RL1 = 390Ω, RL2 = NC, CL = 5 pF ( Figure 5) tRZHT VCI = Bn, VC = 0V, RC = 18Ω, 2 8 15 ns CD = 0.8V, VL = 0V, RL1 = NC RL2 = 1.6k, CL = 30 pF ( Figure 5) tNR Receiver Noise (Figure 6) 3 6 ns Rejection Pulse Width Note: NC means open DS3897 Switching Characteristics (0°C ≤ TA ≤ 70°C, 4.75V ≤ VCC ≤ 5.25V unless otherwise specified) Symbol Parameter Conditions Min Typ Max Units Driver: tDLH Dn, En to Bn TE = 0.8V, RE = 2.0V, VL = 2V 5 9 15 ns tDHL (Figure 2) 5 9 15 ns tDLHT TE to Bn An = RE = 2.0V, VL = 2V, ( Figure 2) 5 10 18 ns tDHLT RC = 390Ω, VCI = An, VC = 5V, CL = 30 pF 5 12 20 ns RL1 = 18Ω, RL2 = NC, VL = 2V ( Figure 5) tR Driver Output Rise Time CD = 0.8V, T/R = 2V, VL = 2V 3 6 10 ns tF Driver Output Fall Time (Figure 2) 3 6 10 ns www.national.com 4
FIGURE 1. Driver Output Low Voltage Test FIGURE 2. Driver Propagation Delays
FIGURE 3. Receiver Propagation Delays FIGURE 4. Propagation Delay from CD pin to An
FIGURE 5. Propagation Delay from T/R pin to An or Bn FIGURE 6. Receiver Noise Immunity: “No Response at Output” Input Waveforms
FIGURE 7. Driver Plus Receiver Delays
Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead (0.300″ Wide) Molded Small Outline Package, JEDEC (M) Order Number DS3896M or DS2897M Molded Dual-In-Line Package (N) Order Number DS3896N or DS3897N 9 www.national.com
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