SN64BCT241 OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCBS046C – FEBRUARY 1990 – REVISED JULY 1998 D D D D D DW OR N PACKAGE (TOP VIEW) State-of-the-Art BiCMOS Design Substantially Reduces Standby Current 3-State Outputs Drive Bus Lines or Buffer-Memory Address Registers ESD Protection Exceeds 2000 V Per MIL-STD-883 Method 3015 High-Impedance State During Power Up and Power Down Package Options Include Small-Outline (DW) and Standard Plastic DIPs (N) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 description This octal buffer and line driver is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. With the SN64BCT240 and SN64BCT244, these devices provide the choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. The SN64BCT241 is characterized for operation from – 40°C to 85°C and 0°C to 70°C. FUNCTION TABLES INPUTS 1OE 1A OUTPUT 1Y L H H L L L H X Z INPUTS 2OE 2A OUTPUT 2Y H H H H L L L X Z Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 1998, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SN64BCT241 OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCBS046C – FEBRUARY 1990 – REVISED JULY 1998 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1 1OE EN 2 18 4 16 6 14 8 12 1Y1 1A1 2OE 2A1 2A2 2A3 2A4 18 4 16 6 14 8 12 1Y1 1Y2 1Y3 1A2 1Y2 1Y4 1A3 19 2 1Y3 EN 11 9 13 7 15 5 17 3 1A4 1Y4 2Y1 2Y2 2Y3 2OE 19 2Y4 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2A1 2A2 2A3 11 9 13 7 15 5 17 3 2A4 2Y1 2Y2 2Y3 2Y4 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . – 0.5 V to 5.5 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC Current into any output in the low state, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C ‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input negative voltage rating may be exceeded if the input clamp current rating is observed. 2. The package thermal impedance is calculated in acordane with JESD 51, except for through-hole packages, which use a trace length of zero. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN64BCT241 OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCBS046C – FEBRUARY 1990 – REVISED JULY 1998 recommended operating conditions (see Note 3) VCC VIH Supply voltage VIL IIK Low-level input voltage IOH IOL High-level input voltage MIN NOM MAX 4.5 5 5.5 2 UNIT V V 0.8 V Input clamp current –18 mA High-level output current – 15 mA Low-level output current 64 mA TA Operating free-air temperature – 40 85 °C NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VCC = 4 4.5 5V VOH VCC = 4.75 V, VCC = 4.5 V, VOL IOZH 1OE at 0.8 V,, 2OE at 2 V II IIH IIL 1OE or 2OE TYP† II = –18 mA IOH = – 3 mA 2.4 3.3 IOH = – 15 mA IOH = – 3 mA 2 3.1 2.7 0.42 VO = 0.5 V VCC = 0 to 2.3 V (power up) VCC = 1.8 V to 0 (power down) VO = 2 2.7 7 V or 0 0.5 5V V, VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V VCC = 5 5.5 5V V, VI = 0 0.5 5V IOS‡ ICCL VCC = 5.5 V, VCC = 5.5 V, VO = 0 Output open ICCH ICCZ VCC = 5.5 V, VCC = 5.5 V, Ci VCC = 5 V, VCC = 5 V, Any A input MIN IOH = 64 mA VO = 2.7 V VCC = 5.5 V, VCC = 5.5 V, IOZL IOZ TEST CONDITIONS UNIT –1.2 V V 0.55 V 50 µA – 50 µA " 50 " 50 mA 20 µA – 1.6 – 100 µA 0.1 –1 mA – 225 mA 23 43 mA Output open 53 85 mA Output open 4 10 mA VI = 2.5 V or 0.5 V VO = 2.5 V or 0.5 V 6 pF 11 pF Co † All typical values are at VCC = 5 V, TA = 25°C. ‡ Not more than one output should be tested at a time, and the duration of the test should not exceed one second. POST OFFICE BOX 655303 MAX • DALLAS, TEXAS 75265 3 SN64BCT241 OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCBS046C – FEBRUARY 1990 – REVISED JULY 1998 switching characteristics (see Figure 1) PARAMETER 4 FROM (INPUT) TO (OUTPUT) tPLH tPHL A Y tPZH tPZL 1OE or 2OE Y tPHZ tPLZ 1OE or 2OE Y POST OFFICE BOX 655303 VCC = 5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω TA = – 40°C to 85°C UNIT TA = 0°C to 70°C MIN MAX MIN MAX MIN MAX 0.5 4.5 0.5 5.2 0.5 4.9 1 5.4 1 6.3 1 5.9 1 7.8 1 9.1 1 8.7 1 8.6 1 10 1 9.4 1 6.8 1 8.4 1 8.1 1 8.1 1 11 1 9.9 • DALLAS, TEXAS 75265 ns ns ns SN64BCT241 OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCBS046C – FEBRUARY 1990 – REVISED JULY 1998 PARAMETER MEASUREMENT INFORMATION 7 V (tPZL, tPLZ, O.C.) S1 Open (all others) From Output Under Test Test Point CL (see Note A) R1 From Output Under Test R1 Test Point CL (see Note A) R2 LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR 3-STATE AND OPEN-COLLECTOR OUTPUTS High-Level Pulse (see Note B) 3V Timing Input (see Note B) 3V 1.5 V 1.5 V 0V 1.5 V tw 0V Data Input (see Note B) 3V th tsu Low-Level Pulse 3V 1.5 V 1.5 V 0V 1.5 V 1.5 V VOLTAGE WAVEFORMS PULSE DURATION 0V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3V 3V Input (see Note B) 1.5 V 1.5 V 0V tPLH In-Phase Output (see Note D) VOH 1.5 V 1.5 V VOL 1.5 V 1.5 V 1.5 V 0V tPLZ 1.5 V Waveform 1 (see Notes C and D) 3.5 V VOL tPHZ tPLH VOH 1.5 V tPZL tPHL tPHL Out-of-Phase Output (see Note D) Output Control (low-level enable) 0.3 V tPZH Waveform 2 (see Notes C and D) VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (see Note D) VOH 1.5 V 0.3 V 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, tr = tf ≤ 2.5 ns, duty cycle = 50%. C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. D. The outputs are measured one at a time with one transition per measurement. E. When measuring propagation delay times of 3-state outputs, switch S1 is open. Figure 1. Load Circuits and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 PACKAGE OPTION ADDENDUM www.ti.com 24-Jun-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN64BCT241DW OBSOLETE SOIC DW 20 TBD Call TI Call TI SN64BCT241N OBSOLETE PDIP N 20 TBD Call TI Call TI Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. 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