SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 D D D D D D D D D D D Improved Speed and Package Replacement for the SN75LBC976 Designed to Operate at up to 20 Million Data Transfers per Second (Fast-20 SCSI) Nine Differential Channels for the Data and Control Paths of the Small Computer Systems Interface (SCSI) and Intelligent Peripheral Interface (IPI) SN75976A Packaged in Shrink Small-Outline Package with 25-Mil Terminal Pitch (DL) and Thin Shrink Small-Outl
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 description (continued) In addition to speed improvements, the ’976A can withstand electrostatic discharges exceeding 12 kV using the human-body model, and 600 V using the machine model of MIL-PRF-38535, Method 3015.7 on the RS-485 I/O terminals. This is six times the industry standard and provides protection from the noise that can be coupled into external cables.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 Terminal Functions TERMINAL NAME NO. Logic g Level I/O Termination DESCRIPTION 1A to 9A 4,6,8,10, 19,21,23, 25,27 TTL I/O Pullup 1A to 9A carry data to and from the communication controller. 1B – to 9B – 29,31,33, 35,37,.46, 48,50,52 RS-485 I/O Pulldown 1B – to 9B – are the inverted data signals of the balanced pair to/from the bus.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 logic diagram (positive logic) CDE0 CDE1 BSR 1A 1DE/RE 2A 2DE/RE 3A 3DE/RE 4A 4DE/RE CDE2 CRE 5A 5DE/RE 6A 6DE/RE 7A 7DE/RE 8A 8DE/RE 54 55 2 30 4 29 5 6 7 8 9 10 11 Channel 2 Channel 3 Channel 4 9DE/RE 4 32 31 34 33 36 35 2B+ 2B– 3B+ 3B– 4B+ 4B– 56 3 38 19 37 5B+ 5B– 20 21 22 23 24 25 26 Channel 6 Channel 7 Channel 8 2 9A 1B+ 1B– 27 BSR 3 BSR 47 46 49 48 51 50 6B+ 6B– 7B+ 7B– 8B+ 8
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 schematics of inputs and outputs DE/RE, CRE, BSR, AND A Inputs CDE0, CDE1, AND CDE2 Inputs VCC VCC 100 kΩ 1 kΩ 1 kΩ Input Input 100 kΩ 8V 8V B + Input B – Input VCC 100 kΩ 16 V VCC 2 kΩ 2 kΩ 16 V 18 kΩ Input 18 kΩ Input 100 kΩ 4 kΩ 4 kΩ 16 V 16 V B + AND B – Outputs VCC A Output VCC 2 kΩ 40 Ω 16 V 18 kΩ Output Output 8V 4 kΩ 16 V POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 6 V Bus voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 recommended operating conditions Supply voltage, VCC High-level input voltage, VIH Except nB+, nB–† Low-level input voltage, VIL Except nB+, nB–† Voltage at any bus terminal (separately or common common-mode), mode) VO, VI, or VIC nB+ or nB – MIN NOM MAX UNIT 4.75 5 5.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER S1 to A, VODH VODL VOH VOL Driver differential highlevel output out ut voltage Driver D i diff differential ti l lowl level output out ut voltage High-level output voltage Low-level output voltage SN55976A TYP† MAX TEST CONDITIONS VT = 5 V, See Figure 1 SN75976A TYP† MAX UNIT MIN MIN 0.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 driver switching characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS SN75976A TYP† MAX MIN 2.5 13.5 ns 3 11 ns 5 13 ns 4.5 11.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 receiver switching characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS ’976A1 tpd d Propagation g delay y time,, tPHL or tPLH (see Figures 3 and 4) tsk(lim) k(li ) Skew limit,, maximum tpd d – minimum tpd d (see Note 5) ’976A2 VCC = 5 V, VCC = 5 V, TC = 25°C TC = 100°C SN75976A TYP† MAX MIN UNIT 7.5 16.5 ns 8.5 14.5 ns 8.6 13.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 PARAMETER MEASUREMENT INFORMATION SN75976A = 5 V SN55976A = 4.5 V A S1 B+ IO 15 pF II A Input (see Note A) 165 Ω B 165 Ω 375 Ω VO VI 375 Ω 75 Ω VOD IO B– S2 VO † 15 pF † CDE0 and DE/RE are at 2 V, BSR is at 0.8 V and, for the SN75976A only, all others are open. ‡ For the SN75976A only, all nine drivers are enabled, similarly loaded, and switching. Figure 1.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 PARAMETER MEASUREMENT INFORMATION 3V Input B – 1.5 V 1.5 V Input B + 0V tPLH Output tPHL 90% 1.4 V 10% 90% tr VOH 1.4 V 10% VOL tf Figure 4. Receiver Delay and Transition Time Waveforms 4.5 V A S1 B+ 50 pF A 0 V or 3 V 165 Ω B 165 Ω 375 Ω 75 Ω VOD 375 Ω B– DE/RE S2 50 pF† See Table 1 Input † Includes probe and jig capacitance in two places. Figure 5.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 PARAMETER MEASUREMENT INFORMATION VT 0 V or 3 V Input 3 V or 0 V 620 Ω B+ A Output DE/RE † 40 pF‡ B– † CDE0 is high, CDE1, CDE2, BSR, and CRE are low and, for the SN75976A only, all others are open. ‡ Includes probe and jig capacitance. Figure 7. Receiver Enable and Disable Time Test Circuit 3V Input 1.4 V 1.4 V 0V tPLZ Output tPZL 1.4 V VOD 1.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 TYPICAL CHARACTERISTICS AVERAGE SUPPLY CURRENT vs FREQUENCY LOGIC INPUT CURRENT vs INPUT VOLTAGE – 30 A, DE/RE,CRE,BSR – 25 200 I I – Logic Input Current – µ A I CC – Average Supply Current – mA 250 150 100 ÁÁ ÁÁ ÁÁ 9 Drivers 50 – 20 – 15 – 10 –5 9 Receivers 0 0.001 0.01 0.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 TYPICAL CHARACTERISTICS DRIVER DRIVER HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT AVERAGE DIFFERENTIAL OUTPUT VOLTAGE vs AVERAGE CASE TEMPERATURE |VOD | – Average Differential Output Voltage – V 4 VOH – High-Level Output Voltage – V 3.5 ÁÁ ÁÁ ÁÁ 3 2.5 2 1.5 1 0.5 0 0 – 20 – 40 – 60 – 80 IOH – High-Level Output Current – mA – 100 2.5 VOD(L), VCC = 5.25 V 2 1.5 VOD(L), VCC = 4.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 TYPICAL CHARACTERISTICS DRIVER OUTPUT CURRENT vs SUPPLY VOLTAGE 100 TA = 25°C 80 I O – Output Current – mA IOH 60 40 20 0 – 20 – 40 – 60 IOL – 80 0 1 2 3 4 VCC – Supply Voltage – V Figure 17 16 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 6
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION Table 2.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION Function Tables RECEIVER DRIVER B+ A INPUTS B+ A B– B– B +† B –† OUTPUT A INPUT A L H H L L H L H TRANSCEIVER OUTPUTS B+ B– L H H L DRIVER WITH ENABLE B+ A B+ B– A B– DE/RE DE/RE DE/RE L L H H INPUTS A B +† – – L H L H – – B –† A H L – – L H – – INPUTS DE/RE A OUTPUTS B– B+ – – L H L L H H – – H L WIRED-OR DRIVER L H L H OUTPUTS B– B+ Z Z L H Z Z H L
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION VCC VCC SCSI Connector 620 Ω † nB + nA I/O EN 620 Ω † + nB – – SCSI Connector 620 Ω † nB + nA I (b) ACTIVE-LOW BIDIRECTIONAL I/O WITH SEPARATE ENABLE VCC VCC 620 Ω † 620 Ω † I + nB – O – – nDE/RE (d) SEPARATE ACTIVE-HIGH INPUT, OUTPUT, AND ENABLE VCC VCC SCSI Connector nB + nA + nB – EN (c) WIRED-OR DRIVER AND ACTIVE-HIGH INPUT I O‡ SCSI Connector nB + nA O‡
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION channel logic configurations with control input logic The following logic diagrams show the positive-logic representation for all combinations of control inputs. The control inputs are from MSB to LSB; the BSR, CDE0, CDE1, CDE2, and CRE bit values are shown below the diagrams. Channel 1 is at the top of the logic diagrams; channel 9 is at the bottom of the logic diagrams.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Figure 24. 00101 Hi-Z Figure 25. 00110 Figure 26. 00111 Figure 28. 01001 Figure 27.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION Figure 32. 01101 Figure 29. 01010 22 Figure 30. 01011 Figure 31. 01100 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Figure 33.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Figure 34. 01111 Figure 35. 10000 and 10001 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Figure 36. 10010 and 10011 Figure 37. 10100 and 10101 Hi-Z Figure 38.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 APPLICATION INFORMATION Hi-Z Figure 39. 11000 and 11001 Hi-Z Figure 40. 11010 and 11011 Hi-Z Figure 41. 11100 and 11101 Hi-Z Figure 42.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 MECHANICAL INFORMATION DGG (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 48 PIN SHOWN PINS ** 48 56 64 A MAX 12,60 14,10 17,10 A MIN 12,40 13,90 16,90 DIM 0,27 0,17 0,50 48 0,08 M 25 6,20 6,00 8,30 7,90 0,15 NOM 1 Gage Plane 24 A 0,25 0°– 8° 0,75 0,50 Seating Plane 1,20 MAX 0,05 MIN 0,10 4040078 / D 08/96 NOTES: B. All linear dimensions are in millimeters. C.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 MECHANICAL INFORMATION DL (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 48 PIN SHOWN PINS ** 28 48 56 A MAX 0.380 (9,65) 0.630 (16,00) 0.730 (18,54) A MIN 0.370 (9,40) 0.620 (15,75) 0.720 (18,29) DIM 0.025 (0,635) 0.012 (0,305) 0.008 (0,203) 48 0.005 (0,13) M 25 0.006 (0,15) NOM 0.299 (7,59) 0.291 (7,39) 0.420 (10,67) 0.395 (10,03) Gage Plane 0.010 (0,25) 1 0°– 8° 24 0.040 (1,02) A 0.
SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 MECHANICAL INFORMATION WD (R-GDFP-F**) CERAMIC DUAL FLATPACK 48 PIN SHOWN NO. OF PINS** 0.120 (3,05) 0.075 (1,91) A MIN MAX 48 0.630 (16,00) 0.730 (18,54) 56 0.610 (15,49) 0.710 (18,03) 0.005 (0,13) NOM 1.200 (30,50) 0.950 (24,13) 0.390 (9,91) 0.370 (9,40) 1 48 0.025 (0,635) A 0.010 (0,25) TYP 24 25 4040176 / C 04/96 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters).
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN75976A1DGGR Package Package Pins Type Drawing TSSOP SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant DGG 56 2000 330.0 24.4 8.6 15.6 1.8 12.0 24.0 Q1 SN75976A1DLR SSOP DL 56 1000 330.0 32.4 11.35 18.67 3.1 16.0 32.0 Q1 SN75976A2DGGR TSSOP DGG 56 2000 330.0 24.4 8.6 15.6 1.8 12.0 24.
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN75976A1DGGR TSSOP DGG 56 2000 367.0 367.0 45.0 SN75976A1DLR SSOP DL 56 1000 367.0 367.0 55.0 SN75976A2DGGR TSSOP DGG 56 2000 367.0 367.0 45.0 SN75976A2DLR SSOP DL 56 1000 367.0 367.0 55.
MECHANICAL DATA MCFP010B – JANUARY 1995 – REVISED NOVEMBER 1997 WD (R-GDFP-F**) CERAMIC DUAL FLATPACK 48 LEADS SHOWN 0.120 (3,05) 0.075 (1,91) 0.009 (0,23) 0.004 (0,10) 1.130 (28,70) 0.870 (22,10) 0.370 (9,40) 0.250 (6,35) 0.390 (9,91) 0.370 (9,40) 0.370 (9,40) 0.250 (6,35) 48 1 0.025 (0,635) A 0.014 (0,36) 0.008 (0,20) 25 24 NO. OF LEADS** 48 56 A MAX 0.640 (16,26) 0.740 (18,80) A MIN 0.610 (15,49) 0.710 (18,03) 4040176 / D 10/97 NOTES: A. B. C. D. E.
MECHANICAL DATA MTSS003D – JANUARY 1995 – REVISED JANUARY 1998 DGG (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 48 PINS SHOWN 0,27 0,17 0,50 48 0,08 M 25 6,20 6,00 8,30 7,90 0,15 NOM Gage Plane 1 0,25 24 0°– 8° A 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 48 56 64 A MAX 12,60 14,10 17,10 A MIN 12,40 13,90 16,90 DIM 4040078 / F 12/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.