Data Communications UltraSCSI Terminator Family Design for UltraSCSI Performance! ◆ FAST–20 SCSI Operation ◆ New Adaptive, Non-Linear Architecture ◆ 35MHz Bandwidth – High signal integrity – Lower error rate ◆ Eliminate Costly Capacitors ◆ Dallas, Linfinity and Unitrode Pin-compatible ISO 9001 Registered Data Communications Non-Linear Terminator Family 9-Channel TERM POWER THERMAL LIMITING DISC (5111, 5115, 5219) DISC (5112) CURRENT BIASING 24mA CURRENT LIMITING DATA OUT PIN DB(0) – + + 1.4V 2.85V ◆ ◆ ◆ ◆ ◆ ◆ (5218) Upgrade DS21S07A designs (IMP5115) Sleep-mode current under 275µA (IMP5111) 3.3/3.5V operation Less than 3pF output capacitance Hot-swap compatible 16-SOIC/16-SOWB/20-TSSOP packages DISC 1 DISC 2 1 OF 9 CHANNELS 18-Channel TERM POWER THERMAL LIMITING CURREN T BIASING IMP5226 24mA CURRENT LIMITING DATA OUTPUT PIN DB(0) DISCONNECT 2.85V IMP5225 DISCONNECT 1 DISCONNECT 2 ◆ ◆ ◆ ◆ ◆ ◆ Sleep-mode current under 200µA (IMP5226) Sleep-mode current under 275µA (IMP5225) 3.5V operation Less than 4pF output capacitance Hot-swap compatible 28-SSOP/28-SOWB packages 1.4V 1 OF 18 CHANNELS 27-Channel TERM POWER THERMAL LIMITING CURRENT BIASING 24mA CURRENT LIMITING DATA OUTPUT PIN DB(0) VCC 2.85V DISC1 DISC2 1.4V 1 OF 27 CHANNELS IMP5121 ◆ Split dual disconnect and logic for 16/18-bit bus mixing ◆ Plug-and-Play ◆ Less than 3pF output capacitance ◆ Superior pin-for-pin replacement for UCC5621 ◆ Hot-swap compatible ◆ 44-SSOP/56-TSSOP packages Data Communications Non-Linear Architecture Advantages Higher Speed and Performance IDEAL 2.85V Vn V2 Non-Linear Terminator Maximizes Continuous Bus Current VOut Fast, Reliable Transition Vn = Zc ITERM V2 = V1 + Zc ITERM Vn=1 = Vn + Zc ITERM Zc = Line Z Linear Load Line ITERM V1 24mA Maximum Continuous Bus Current High Current Gives First-Step De-Assertion Advantage 3.0 V 3.0 V Slow Unreliable Transition Linear Terminator Fast Response 0.8V 0.8V Γ= Positive Γ Linear Terminator Poorly Matches Loaded Cable Z –Z ZTERM + ZC TERM C ––––––––––––––– Negative Γ Assertion Advantage: Non-Linear Terminator Matches “Real World” System Impedance Fewer Components VC • No Capacitors • 35MHz Bandwidth Linear CS CS= Stability capacitor CF= Frequency capacitor Adaptive Non-Linear Circuitry CF 60 ohms Non-Linear Terminator Eliminates Capacitors Linear Terminators Require Extra Components High-Bandwidth Terminator Eliminates Capacitors and Lowers Cost Data Communications Package Options 5111, 5112 TSSOP 5111, 5112 SOIC T7 T8 1 2 T9 HS/GND GND DISC* 3 4 5 6 T1 T2 7 8 DP 16 15 T6 T5 14 13 12 11 NC HS/GND HS/GND VTERM 10 9 T4 T3 T7 T8 T9 NC GND HS/GND HS/GND HS/GND HS/GND 1 2 3 4 5 6 7 8 9 10 11 12 DISC* T1 T2 *DISC for the IMP5112 & DISC for the IMP5111 PWP 24 23 22 21 20 19 18 17 16 15 14 13 5115 SOIC T6 T5 NC NC HS/GND HS/GND HS/GND HS/GND NC VTERM T4 T3 TPWR D0 1 2 D1 D2 D3 D4 3 4 5 6 NC GND 7 8 D 16 15 DIS NC 14 13 12 11 D8 D7 D6 D5 10 9 NC NC *DISC for the IMP5112 & DISC for the IMP5111 5115 SOWB TPWR D0 16 15 DIS NC 14 3 4 DW 13 12 5 11 6 NC D8 D7 D6 10 9 D5 NC 1 2 D1 D2 D3 D4 NC GND 5115 TSSOP 7 8 TPWR HS/GND D0 D1 D2 D3 D4 HS/GND NC GND 1 2 3 4 5 6 7 8 9 10 5121 SSOP DIS NC HS/GND NC D8 D7 D6 D5 HS/GND NC 20 19 18 17 16 15 14 13 12 11 PWP T19 T20 T1 1 2 3 44 43 42 T27 T26 T25 T2 W1 4 5 41 40 T18 N1 W2 T3 T4 T5 GND GND 6 7 8 9 10 11 39 38 37 36 35 34 T17 T16 T15 NC GND GND GND GND DISC1 DISC2 T6 T7 T8 12 13 14 15 16 17 18 33 32 31 30 29 28 27 GND GND VT T14 T13 T12 NC DISC1 T1 T2 T3 T4 T5 HS/GND GND HS/GND T6 T7 T8 T9 VTERM 1 2 3 4 5 6 7 8 9 DB 10 11 12 13 14 5225 SOWB 28 27 26 25 24 23 22 21 20 19 18 17 16 15 DISC2 T18 T17 T16 T15 T14 HS/GND HS/GND HS/GND T13 T12 T11 T10 NC DISC1 T1 T2 T3 T4 T5 1 2 3 28 27 26 4 25 5 24 6 23 HS/GND GND HS/GND T6 T7 T8 7 22 T9 VTERM Daily Silver IMP Revision : A Issue Date: 08/08/05 DISC2 T18 T17 T16 T15 T14 10 19 11 12 18 17 13 16 T10 14 15 NC ISO 9001 Registered www.ds-imp.com.cn Phone: (086)-574-87906358 Fax: (086) -574-87908866 26 25 24 23 NC T11 T24 T23 T19 T20 T1 T2 W1 W2 T3 T4 T5 GND GND HS HS HS HS HS HS GND GND DISC1 DISC2 T6 T7 T8 T9 T10 T21 T22 5226 SSOP HS/GND HS/GND HS/GND T13 T12 T11 8 DWP 21 9 20 DB 19 20 21 22 T9 T10 T21 T22 5225 SSOP 5121 TSSOP DISC T1 T2 T3 T4 T5 HS/GND GND HS/GND T6 T7 T8 T9 VTERM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DB 1 56 2 3 4 55 54 53 5 52 6 51 7 8 9 10 11 50 49 48 47 46 12 13 PW 45 44 14 15 43 42 16 41 17 18 19 20 21 40 39 38 37 36 22 23 35 34 24 25 33 32 26 31 27 28 30 29 T27 T26 T25 T18 N1 T17 T16 T15 NC GND GND HS HS HS HS HS HS GND GND VT T14 T13 T12 NC NC T11 T24 T23 5226 SOWB 28 27 26 25 24 23 22 21 20 19 18 17 16 15 GND T18 T17 T16 T15 T14 HS/GND HS/GND HS/GND T13 T12 T11 T10 NC DISC T1 T2 T3 T4 T5 HS/GND GND HS/GND T6 T7 T8 T9 VTERM 1 2 3 28 27 26 4 25 5 24 6 23 7 22 8 DWP 21 9 20 10 19 11 12 18 17 13 16 14 15 GND T18 T17 T16 T15 T14 HS/GND HS/GND HS/GND T13 T12 T11 T10 NC