DatasheetsPDF.com

S21S07ACTR Dataheets PDF



Part Number S21S07ACTR
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description SCSI TERMINATOR
Datasheet S21S07ACTR DatasheetS21S07ACTR Datasheet (PDF)

ST21S07A SCSI TERMINATOR s s s s s s s s s s FULLY COMPLIANT WITH SCSI, SCSI-2 AND EMERGING SCSI-E STANDARDS PROVIDES ACTIVE TERMINATION FOR NINE SIGNAL LINES LOW DROPOUT (0.5V) VREGS:2.85V FACTORY TRIMMED TERMINATION 110Ω (±2%) POWER DOWN MODE ISOLATES TERMINATION RESISTORS FROM THE BUS FULLY SUPPORTS ACTIVELY NEGATED SCSI SIGNALS COMPATIBLE TO THE DS2107, DS2107A AND DS21S07 ONBOARD THERMAL SHUTDOWN CIRCUITRY AVAILABLE IN SO-16L AND TSSOP20 SCSI BUS HOT PLUG-COMPATIBLE SOP TSSOP DES.

  S21S07ACTR   S21S07ACTR


Document
ST21S07A SCSI TERMINATOR s s s s s s s s s s FULLY COMPLIANT WITH SCSI, SCSI-2 AND EMERGING SCSI-E STANDARDS PROVIDES ACTIVE TERMINATION FOR NINE SIGNAL LINES LOW DROPOUT (0.5V) VREGS:2.85V FACTORY TRIMMED TERMINATION 110Ω (±2%) POWER DOWN MODE ISOLATES TERMINATION RESISTORS FROM THE BUS FULLY SUPPORTS ACTIVELY NEGATED SCSI SIGNALS COMPATIBLE TO THE DS2107, DS2107A AND DS21S07 ONBOARD THERMAL SHUTDOWN CIRCUITRY AVAILABLE IN SO-16L AND TSSOP20 SCSI BUS HOT PLUG-COMPATIBLE SOP TSSOP DESCRIPTION The SCSI-2 and SCSI-3 standards recommend the use of active terminations at both ends of every cable segment in a SCSI system with a single-ended drivers and reveivers. The ST21S07A SCSI terminator, which is fully ORDERING CODES Type ST21S07ACW ST21S07ACWR S21S07ACTR (*) (*) Available on request compliant with these standands, enables the designer to gain the benefits of active termination: greater immunity to voltages drop on the TERMPWR (TERMination PoWeR) line, enhanced high level noise immunity, intrinsic TERMPWR decouplig, and very low quiescent current consumption. The ST21S07A integrates a regulator and nine precise switched 110Ω termination resistors into a monolithic IC. The ST21S07A can be electrically isolatesd from the SCSI bus without physical removal from the SCSI device. Temperature Range 0 to 70 °C 0 to 70 °C 0 to 70 °C Package SO-16L (Tube) SO-16L (Tape & Reel) TSSOP20 (Tape & Reel) Comments 49parts per tube / 25tube per box 1000 parts per reel 2500 parts per reel February 2001 1/10 ST21S07A PIN CONFIGURATION SO-16L TSSOP20 PIN DESCRIPTION PlN N° (TSSP20) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10 11 12 13 14 2 3 4 5 6 PlN N° (SO-16L) 1 SYMBOL NAME AND FUNCTION 7 8 9 15 16 TERMPWR1 Termination Power 1: Should be connected to the SCSI TERMPWR line. Must be decoupled with either a 2.2µF or 4.7µF. See Fig. 2. HS-GND Heat Sink Ground: Internally connected to the mounting pad. Should be either grounded or electrically isolated from the other circuitry. R1 Signal Termination 1: 110 Ω Termination R2 Signal Termination 2: 110 Ω Termination R3 Signal Termination 3: 110 Ω Termination R4 Signal Termination 4: 110 Ω Termination R5 Signal Termination 5: 110 Ω Termination HS-GND Heat Sink Ground: Internally connected to the mounting pad. Should be either grounded or electrically isolated from the other circuitry. Reference Voltage 1: Must be external connected directly to the VREF2 VREF1 pin. Must be decoupoled with 4.7µF capacitor as shown in Figure 2 GND Ground: Signal groud: 0V TERMPWR Termination Power21: Should be connected to the SCSI TERMPWR line. Must be decoupled with either a 2.2µF or 4.7µF. See Fig. 2. HS-GND Heat Sink Ground: Internally connected to the mounting pad. Should be either grounded or electrically isolated from the other circuitry. R6 Signal Termination 6: 110 Ω Termination R7 Signal Termination 7: 110 Ω Termination R8 Signal Termination 8: 110 Ω Termination R9 Signal Termination 9: 110 Ω Termination NC Not connected: Do not connect any signal to this pin HS-GND Heat Sink Ground: Internally connected to the mounting pad. Should be either grounded or electrically isolated from the other circuitry. Reference Voltage 2: Must be external connected directly to the VREF1 VREF2 pin. Must be decoupoled with 4.7µF capacitor PD Power Down: When tied low, the ST21S07A enters a power down mode. Contains an internal 60K pull-up. Strap low to deactivate the ST21S07A, leave open circuited to activate the ST21S07A 2/10 ST21S07A ABSOLUTE MAXIMUM RATINGS Symbol VPIN Tstg Top Parameter Voltage on Any Pin Relative to Ground Storage Temperature Range Operating Junction Temperature Range Value -1 to 7 -55 to +150 0 to +70 Unit V °C °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. RECOMMENDED OPERATING CONDITIONS Symbol VTP VPDA VPDI Parameter TERMPWR Voltage PD Active PD Inactive Test Conditions Min. 4 -0.3 2 Typ. Max. 5.5 0.8 VTP+0.3 Unit V V V DC CHARACTERISTICS (T A = 0 to 70°C, unless otherwise specified.) Symbol ITP IPD RTERM TSD CPD HPD IIH IIL Parameter TERMPWR Current Power Down Current Termination Resistance Die Thermal Shutdown Power Down TermniatioN Capacitance Power Down Hysteresis Input Leackage High Input Leackage Low Test Conditions (note 1, 3) (note 1, 4) (note 1, 2, 5) (note 1, 2) (note 1, 6) (note 1, 2, 5, 6) (note 1) (note 1, 8) (note 1, 7) -1 1 108 150 Min. Typ. 1.5 70 110 170 3 280 5 Max. 250 8 150 112 Unit mA mA µA Ω °C pF mV µA µA REGULATOR CHARACTERISTICS (TA = 0 to 70°C, unless otherwise specified.) Symbol VREF vDROP LIREG ILIM ISINK IOUT Parameter Output Voltage Drop-out Voltage Line Regulation Current Limit Sink Current Output Current (note 1, 2) (note 3, 6) (note 1, 4) (note 1, 2) (note 1) (note 1) (note9) 200 25.2 Test Conditions Min. 2.79 Typ. 2.85 0.3 0.25 0.5 450 Max. 2.93 0.75 2 3 Unit V V % % mA mA mA LOREG Load Regulatio Note 1: TERMPWR = 4V .


S21MT2 S21S07ACTR S22


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)