AN8612NSB PANASONIC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 7

Technical content

ICs for Information Equipment AN8612NSB SCSI active terminator IC n Overview The AN8612NSB is a terminator IC conformed to standard interface specification (SCSI-I/II) for personal computers, workstations and various types of information equipment. So far configured with a fixed resistor and a regulator, it has recently been integrated onto a single chip with built-in standby function. It is easy to satisfy 25 pF of the maximum pin capacitance in SCSI-II specification due to its small output pin capacitance. It can sapport 10 Mbyte/s of SCSI-II and 20 Mbyte/s of FAST-20. n Features

  • Active termination for 18-signal line
  • Low power consumption due to its standby func- tion (100 mA at standby).
  • Small output pin capacitance: 3.8 pF (typ.)
  • High precision regulator: 2.85 V–60 mV n Applications
  • SCSI interface board of PC
  • SCSI-compatible equipment such as CD-ROM, MO, PD, MD drive and printer HSOP030-P-0300 Unit: mm 12.63±0.20 (1.90) (1.05) 0.50±0.20 0° to 10° 24 19 18 13 16 7 (0.715) (3.20) 7.60±0.30 5.50±0.20 0.30+0.10 –0.05 0.80 Seating plane 0.20 +0.10–0.05

AN8612NSB ICs for Information Equipment n Block Diagram 18115 W REG out SG line1 17115 W SG line2 16115 W SG line3 15115 W SG line4 14115 W SG line5 11115 W SG line6 10115 W SG line7 9115 W SG line8 8115 W SG line9 7115 W SG line10 5115 W SG line11 4115 W Thermal shut down SG line12 3115 W SG line13 2115 W SG line14 23115 W SG line15 22115 W SG line16 21115 W SG line17 6GND 115 W SG line18 Standby 13TERMPWR 2.85 V Band gap reference 19GND

ICs for Information Equipment AN8612NSB n Pin Descriptions Pin No. Description

1 Standby *1

2 SG line14

3 SG line13

4 SG line12

5 SG line11

6 GND *2

Fin GND *2

7 SG line10

8 SG line9

9 SG line8

10 SG line7

11 SG line6

12 V CC (TERMPWR) *3

Pin No. Description

13 V CC (TERMPWR) *3

14 SG line5

15 SG line4

16 SG line3

17 SG line2

18 SG line1

Fin GND *2

19 GND *2

20 SG line18

21 SG line17

22 SG line16

23 SG line15

24 REG out

Note) *1: A standby pin input voltage becomes an active mode at VI < VTH and a standby mode at VI > VTH + . Likewise, a standby mode when standby pin is open. *2: Both ground pins of the pin 6 and pin 19 should be placed on the same pattern, and the pattern should be wide on the PCB. (We recommend that whole surface of one layer of a multi-layer PCB be GND.) *3: Connect the VCC to SCSI termination resistor power supply (TERMPWR). Parameter Symbol Range Unit Supply voltage V CC 4.0 to 5.5 V n Recommended Operating Range Parameter Symbol Rating Unit Supply voltage V CC 6.0 V Supply current I CC 550 mA Power dissipation *2 PD 412 mW Operating ambient temperature *1 Topr -20 to +75 °C Storage temperature *1 T stg -55 to +150 °C n Absolute Maximum Ratings Note) *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: Ta = 75°C. For the independent IC without a heat sink. Refer to "n Application Notes".

AN8612NSB ICs for Information Equipment n Electrical Characteristics at VCC = 5.0 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Supply current 1 I CC1 Standby = low, all SG line = open ¾ 44 54 mA Supply current 2 I CC2 Standby = low, All SG line = 0.2 V ¾ 458 530 mA Supply current 3 I CC3 Standby = open ¾ 100 200 mA Standby pin low-level input ISTBYL V CC = 5.5 V, VI = 0 V -150 -50 ¾m A current Standby pin high-level input ISTBYH V CC = 5.5 V, VI = 5.5 V ¾¾ 1 mA current Standby pin positive direction VTH + 1.3 1.5 1.7 V threshold voltage Standby pin negative direction VTH - 1.1 1.3 1.5 V threshold voltage Maximum output current I SG V SG = 0.2 V 19.8 23.0 26.2 mA SG line1 to SG line18 Output leak current 1 I LK1 V CC = 5.5 V -1 ¾¾ m A SG line1 to SG line18 Standby = open, VSG = 0 V Output leak current 2 I LK2 V CC = 5.5 V, VSG = 2.85 V -1 ¾1 m A SG line1 to SG line18 Standby = open REG output voltage 2 V REG2 V CC = 3.2 V, all SG line = open 2.00 ¾¾ V Termination resistance value RSG ISG = 5 mA to 15 mA 107 115 123 W SG line1 to SG line18 SG line1 to SG line18

  • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Min Typ Max Unit Standby pin hysteresis width VHYS ¾ 200 ¾ mV Output pin capacitance C SG ¾ 3.8 4.5 pF Thermal shutdown temperature TTSD ¾ 170 ¾° C Pin No. Symbol Equivalent circuit

1 Standby

n Terminal Equivalent Circuits 100 kW V CC GND

ICs for Information Equipment AN8612NSB Pin No. Symbol Equivalent circuit

2 Pin 2: SG line14

3 Pin 3: SG line13

4 Pin 4: SG line12

5 Pin 5: SG line11

6 GND ¾

Fin GND ¾

7 Pin 7: SG line10

8 Pin 8: SG line9

9 Pin 9: SG line8

10 Pin 10: SG line7

11 Pin 11: SG line6

12 Pin 12: V CC (TERMPWR)

13 Pin 13: V CC (TERMPWR)

14 Pin 14: SG line5

15 Pin 15: SG line4

16 Pin 16: SG line3

17 Pin 17: SG line2

18 Pin 18: SG line1

n Terminal Equivalent Circuits (continued) 115 W V CC REG out Standby GND Pin 2 115 W V CC REG out Standby GND Pin 7 GND 115 W V CC REG out Standby GND Pin 14

AN8612NSB ICs for Information Equipment Pin No. Symbol Equivalent circuit Fin GND ¾

19 GND ¾

20 Pin 20: SG line18

21 Pin 21: SG line17

22 Pin 22: SG line16

23 Pin 23: SG line15

n Terminal Equivalent Circuits (continued) n Application Notes

  • PD ¾ Ta curves of HSOP030-P-0300 PD ¾ Ta 115 W V CC REG out Standby GND Pin 20 20 kW V CC Standby GND 1400 1344 1200 1000 600 400 200 686 800 00 25 50 75 100 125 150 R th(j-C) = 29.5°C/W Ambient temperature Ta (°C) Power dissipation PD (W) Mounted on standard board (glass epoxy: 50 mm · 50 mm · t0.8 mm) R th(j-a) = 93°C/W PD = 1 344 mW (25°C) Independent IC without a heat shink R th(j-a) = 182°C/W PD = 686 mW (25°C)

ICs for Information Equipment AN8612NSB n Application Circuit Example SCSI equipment V CC REG out Standby GND SG line1 TERMPWR SCSI cable SG line18 SCSI equipment V CC REG out Standby GND SG line1 TERMPWR SCSI cable SG line18 SCSI equipment V CC REG out Standby GND AN8612NSB Terminator: Active Terminator: Standby Terminator: Active AN8612NSB AN8612NSB SG line1 SG line18