BH9595

Mulimedia ICs SCSI active terminator BH9595FP-Y / BH9596FP-Y These SCSI active terminators, developed as a substitute for conventional discrete terminators, maintain good consistency between VM level (2.85V) and GND level (0V) and between VM level and VDD level, and have extremely low power consumption, dropping to a maximum of 90 milliwatts at standby (compared to the maximum of 990 milliwatts used by conventional resistance terminators). These SCSI active terminators electrically control SCSI lines, connecting and disengaging the terminating resistor by electrically controlling the enable pin. (The enable pin is enabled at the HIGH level and switched to the High-Z state by the LOW level in the BH9595 and by the HIGH level in the BH9596, completely disconnecting the SCSI line from the SCSI terminator.) These SCSI active terminators allow for the configuration of flexible, energy-saving SCSI networks, and are ideal for notebook computers, hard disk drives and a wide range of other products with SCSI capabilities. •Applications drives, optical disk drives, CD-ROM driCompact disk ves, tape drives, personal computers (including laptop computers and notebook computers), workstations, mainframes, laser printers, plotters •Features 2.85V power supply and push-pull opera1) Internal tion, for good consistency at all signal levels. 2) Enable pin for terminator enabling and disconnecting, facilitating SCSI network construction. 3) Low power consumption, ideal for energy-saving systems. Power consumption during standby : 90mW (compared to 990mW for conventional resistor terminators)Power consumption at 25% duty : 614mW (compared to 1,360mW for convention resistor terminators)Significant reductions in power consumption are possible. 4) Wide operating range. TERM power : 4.0 ~ 5.5V (Transient : 6.0V) 5) Thin, microminiature design, ideal for space-saving applications. Package body size : 13.6 × 5.4 × 1.9mm 6) Active termination of 18-line SCSI. 7) Internal thermal shutdown circuit. 8) Compatibility with SCSI-I and SCSI-II. 1 Mulimedia ICs BH9595FP-Y / BH9596FP-Y •Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage DC Output current ∗1 DC Output current ∗2 Input voltage Power dissipation ∗3 Operating temperature Storage temperature Symbol VDD1 ISLD ISLS Vi Pd Topr Tstg Limits – 0.3 ~ + 7.0 – 30 35 – 0.6 ~ (VDD1 + 0.6) 1.45 0 ~ + 75 – 55 ~ + 125 Unit V mA mA V W °C °C •Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Input voltage Input voltage SCSI Line voltage Symbol VDD1 VIH VIL VSLX Min. 4.0 VDD1 – 0.6 – 0.3 – 0.3 Typ. 4.5 — — — Max. 5.5∗ VDD1 + 0.6 0.8 VDD1 + 0.3 Unit V V V V ∗1 Drain Current (from Module to SCSI Line) / Line ∗2 Sink Current (from SCSI Line to Module) / Line ∗3 When mounted to a 90 × 50 × 1.6 mm glass epoxy board •Block diagram ∗ Not to be used (N.C.) “H”: ENABLE “L”: DISCONNECT EN 1 2 TSD MODE CONTROL to SW POW POW POW 25 TSD 24 VM 23 SCSI LINE 14 22 SCSI LINE 13 21 SCSI LINE 12 20 SCSI LINE 11 POW (PUSH - PULL) GND 110Ω Resistors 19 SCSI LINE 10 POW (PUSH - PULL) POW (PUSH - PULL) 18 SCSI LINE 17 SCSI LINE (PUSH - PULL) 2.85V SUPPLY POW 2.85V GENERATER POW (PUSH - PULL) BH9595FP-Y 16 SCSI LINE 15 SCSI LINE 14 VDD1 9 8 7 6 POW (PUSH - PULL) GND SCSI LINE 15 3 SCSI LINE 16 4 SCSI LINE 17 5 SCSI LINE 18 6 ∗ Transient 6V GND 7 SCSI LINE 1 8 SCSI LINE 2 9 SCSI LINE 3 10 SCSI LINE 4 11 SCSI LINE 5 12 VDD1 13 (TRMPWR) Schottky barrier diodes SYSTEM POWER 5.0V 0.1µ + 2.2µ – For BH9596 ∗“L”: ENABLE “H”: DISCONNECT 2 Mulimedia ICs BH9595FP-Y / BH9596FP-Y •Pin descriptions Pin No. 1 2 3 4 5 6 — 7 8 9 10 11 12 13 Pin name (N.C.) Not to be used EN (Output enable) SCSI Line 15 SCSI Line 16 SCSI Line 17 SCSI Line 18 GND GND SCSI Line 1 SCSI Line 2 SCSI Line 3 SCSI Line 4 SCSI Line 5 VDD1 Pin No. 14 15 16 17 18 19 — 20 21 22 23 24 25 VDD1 SCSI Line 6 SCSI Line 7 SCSI Line 8 SCSI Line 9 SCSI Line 10 GND SCSI Line 11 SCSI Line 12 SCSI Line 13 SCSI Line 14 VM TSD (TSD signal output) Pin name •Electrical characteristics otherwise noted, Ta = 25°C) DC characteristics (unless Parameter Input leakage current SCSI line leakage current SCSI line short current ∗1 SCSI line short current ∗2 VM voltage Standby current ∗1 SCSI total sink current SCSI total drain current SCSI equivalent resistance Pin capacity ∗3 Symbol IIL IIH ISLZ ISLD ISLS VM IDDSTB ISLS ISLD RSL PC Min. 50 –1 –1 15 7 2.700 — 300 300 105 — Typ. 110 — — 25 20 2.85 1.0 — — — 5.0 Max. 200 1 1 30 30 3.000 2.0 550 550 115 6.0 Unit µA µA µA mA mA V mA mA mA Ω pF Conditions Vi = GND, VDD1 = 5.5V Vi = VDD1, VDD1 = 5.5V EN = ENABLE∗4, VDD1 = 5.5V EN = DISABLE∗5, SCSI Line = GND, 4.0 VDD1 5.5V EN = DISABLE∗5, SCSI Line = VDD1 4.0 VDD1 5.5V 4.0 VDD1 5.5V VDD1 5.5V EN = ENABLE∗4, 4.0V EN = DISABLE∗5, 18 SCSI Line = GND 4.0 VDD1 5.5V EN = DISABLE∗5, 18 SCSI Line = VDD1 4.0 VDD1 5.5V EN = DISABLE∗5, SCSI Line: VDD1 = 4.7V EN = ENABLE∗4 ∗1 Drain Current (from Module to SCSI Line) / Line ∗2 Sink Current (from SCSI Line to Module) / Line ∗3 Guaranteed performance ∗4 BH9595FP-Y: EN = GND, BH9595FP-Y: EN = VDD1 ∗5 BH9696FP-Y: EN = VDD1, BH9696FP-Y: EN = GND 3 Mulimedia ICs Transient characteristics (unless otherwise noted, Ta = 25°C) Parameter Load Transient Voltage 2.85V→GND Load Transient 1 / 10 decay Time 2.85V→GND Load Transient Voltage GND→2.85V Load Transient 1 / 10 decay Time GND→2.85V Load Transient Voltage 2.85V→VDD1 Load Transient Voltage 2.85V→VDD1 Load Transient Voltage VDD1→2.85V Load Transient Voltage VDD1→2.85V Symbol ∆VMTD1 τTD1 ∆VMTD2 τTD2 ∆VMTS1 τTS1 ∆VMTS2 τTS2 Min. – 100 — – 100 — – 100 — – 100 — Max. 100 100 100 100 100 100 100 100 Unit mV µs mV µs mV µs mV µs BH9595FP-Y / BH9596FP-Y Conditions EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: 2.85V→GND Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: 2.85V→GND Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: GND→2.85V Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: GND→2.85V Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: 2.85V→VDD1 Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: 2.85V→VDD1 Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: VDD1→2.85V Level EN = DISABLE∗, 4.0 VDD1 5.5V All SCSI Lines: VDD1→2.85V Level ∗ BH9595FP-Y: EN = VDD1, BH9596FP-Y: GND The transient characteristics are guaranteed design values. SCSI Line Potential VDD1 Level 2.85V GND Level tτ = 50ns – 5.5V – 2.85V 0V ∆VMTD1 ∆VMTD2 ∆VMTS1 ∆VMTS2 VM τ TD1 τ TD2 τ TS1 τ TS1 VDD1 SCSI Line #1 SCSI Active Terminator + #18 – Same Voltage as VDD1 – + VM Fig. 1 Measurement of transient characteristics 4 Mulimedia ICs BH9595FP-Y / BH9596FP-Y •Application example System Power TERMPWR Line System Power 2.2µ + – VDD1 SCSI Active Terminator VDD1 SCSI Active Terminator SCSI Line SCSI Line #1 #1 SCSI DATA LINES + 2.2µ – EN GND VM #18 #18 VM EN GND Fig. 2 5 Mulimedia ICs BH9595FP-Y / BH9596FP-Y •Mode selection table Mode Disable Enable BH9595FP - Y L H BH9596FP - Y H L •Thermal reduction curve 2.5 POWER DISSIPATION: P (W) 1.50 1.45W Duty64% 1.00 •Thermal shutdown at 175°C (typically). (1) All outputs are opened (2) Temperature hysteresis is approximately 20°C. (3) Thermal shutdown output table Conditions Normal Shutdown Level “Low” “High” 0.50 0 25 50 75 100 125 150 175 AMBIENT TEMPERATURE: Ta (°C) Fig. 3 •Operation notes operational range includes har(1) This terminator's monic frequencies. Mount to minimize ground impedance. (2) Connect the VDD1 pin (TERMPWR) to a grounded 2.2µF bypass capacitor. ∗1 ∗2 ∗3 When mounted on a 90 × 50 × 1.6 (mm) glass epoxy board. Reduced by 11.6mW for each increase in Ta of 1°C over 25°C. Can withstand continuous use of 64% duty, at 25°C. •External dimensions (Units: mm) BH9595FP-Y BH9596FP-Y 13.6 ± 0.2 2.75 ± 0.1 25 7.8 ± 0.3 5.4 ± 0.2 14 1 1.9 ± 0.1 13 1.95 ± 0.1 0.11 0.8 0.36 ± 0.1 0.3Min. 0.15 HSOP25 6 0.25 ± 0.1