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| Octal Buffers/Drivers 54BCT244 Memory Logic Diagram FEATURES: * 3-state outputs drive bus lines or buffer memory address registers * RAD-PAK(R) radiation-hardened against natural space radiation * Total dose hardness: - >100 krad (Si), depending upon space mission * Package: - 20-pin RAD-PAK(R) flat package * Operating temperature range: -55 to 125C * P-N-P inputs reduce DC loading * Typical VOLP (output ground bounce) - < 0.8 V at VCC=3.3 V, TA=25C * ESD protection exceeds 2000 V DESCRIPTION: Maxwell Technologies' 54BCT244 octal buffers and line drivers features a greater than 100 krad (Si) total dose tolerance; depending upon space misssion. The 54BCT244 is organized as two 4-bit drivers with separate output enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high impedance state. Maxwell Technologies' patented RAD-PAK(R) packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or a space mission. In a GEO orbit, RAD-PAK provides true greater than 100 krad (Si) total radiation dose tolerance, dependent upon space mission. This product is available with packaging and screening up to Class S. 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 1 (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers TABLE 1. PINOUT DESCRIPTION PIN 1, 19 2, 4, 6, 8 3, 5, 7, 9 10 11, 13, 15, 17 12, 14, 16, 18 20 SYMBOL 1OE-2OE 1A1-1A4 2Y4-2Y1 GND 2A1-2A4 1Y4-1Y1 VCC Input Output Ground Input Output Power Supply DESCRIPTION Output Enables 54BCT244 TABLE 2. 54BCT244 ABSOLUTE MAXIMUM RATINGS 1 PARAMETER Supply Voltage Range Input Voltage Range2 Voltage Range Applied to any Output in the Disable or Power-Off State2 Voltage Range Applied to any Output in High State2 Current Into Any Output in the Low State Total Power Dissipation @ TA = +55 C 3 Operating Temperature Range Storage Temperature Range SYMBOL VCC VI VO VO IO PD TA TS MIN -0.5 -0.5 -0.5 -0.5 ---55 -65 MAX 7.0 7.0 5.5 VCC 96 651 125 150 UNIT V V V V mA mW C C Memory 1. Stresses above the absolute maximum rating may cause permanent damage to the device. Extended operation at the maximum levels may degrade performance and affect reliability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 3. Must be able to withstand the additional PD due to short circuit test, e.g. IDS. The PD number is based upon dc values. TABLE 3. DELTA LIMITS PARAMETER ICC(OP) IOZH IOZL VARIATION 10% of specified value on Table 5 10% of specified value on Table 5 10% of specified value on Table 5 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 2 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers PARAMETER Supply Voltage High-Level Input Voltage Low-Level Input Voltage High-Level Output Current Low-Level Output Current Input Clamp Current Thermal Impedance -- Flat Package Operating Temperature SYMBOL VCC VIH VIL IOH IOL IIK MIN 4.5 2.0 ------55 54BCT244 MAX 5.5 -0.8 -12 48 -18 5.56 125 UNIT V V V mA mA mA C/W C TABLE 4. 54BCT244 RECOMMENDED OPERATING CONDITIONS1 JC TA 1. All unused control inputs must be held high or low to ensure proper device operation. TABLE 5. 54BCT244 DC ELECTRICAL CHARACTERISTICS (VCC = 5V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Input Clamp Voltage High-Level Output Voltage Low-Level Output Voltage Input Current Off-State Output Current High-Level Voltage Applied Off-State Output Current Low-Level Voltage Applied High Level Input Current Low Level Input Current Short-circuit Output Current 1 Memory SYMBOL VIK VOH VOL II IOZH IOZL IIH1 IIH2 IIL IOS ICCH ICCL ICCZ TEST CONDITIONS VCC = 4.5 V VCC = 4.5 V VCC = 4.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V VCC = 5.5 V II = -18 mA IOH = -3 mA IOH = -12 mA IOL = 48 mA VI = 7 V VI = 2.7 V VO = 0.5 V VI = 7 V VI = 2.7 V VI = 0.5 V VO = 0.0 V Outputs Open Outputs Open Outputs Open MIN -2.4 2 -------100 ---- MAX -1.2 --0.55 0.1 50 -50 0.1 20 -1.0 -225 40 80 10 UNIT V V V mA A A mA A mA mA mA mA mA Supply Current, Outputs High Supply Current, Outputs Low Supply Current, Outputs Disabled to High Impedance State 1. Not more than one output should be shorted at one time and the duration of test shall not exceed one second. 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 3 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers TABLE 6. 54BCT244 AC ELECTRICAL CHARACTERISTICS (VCC = 5V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Propagation Delay Time An to Yn SYMBOL tPLH tPHL tPLH tPHL Output Enable Time OE to Yn tPZH tPZL tPZH tPZL Output Disable Time OE to Yn tPHZ tPLZ tPHZ tPLZ TEST CONDITIONS VCC = 4.5 to 5.5 V CL = 50 pF R1 = 500 R2 = 500 TA = -55 to +125 C VCC = 5.0 V CL = 50 pF R1 = 500 R2 = 500 TA = +25 C VCC = 4.5 to 5.5 V CL = 50 pF R1 = 500 R2 = 500 TA = -55 to +125 C VCC = 5.0 V CL = 50 pF R1 = 500 R2 = 500 TA= +25 C VCC = 4.5 to 5.5 V CL = 50 pF R1 = 500 R2 = 500 TA = -55 to +125 C VCC = 5.0 V CL = 50 pF R1 = 500 R2 = 500 TA= +25 C MIN 0.9 1.4 1.2 1.7 2 2 2 2 2 2 2 2 54BCT244 MAX 5.3 6 4.4 5 9 9.4 7.8 8.1 8 9.8 6.7 7.6 UNIT ns ns Memory ns TABLE 7. FUNCTION TABLE (EACH BUFFER) INPUTS OE l L H A H L X OUTPUT Y H L Z 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 4 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers FIGURE 1. LOAD CIRCUIT FOR OUTPUTS 54BCT244 FIGURE NOTE: 1. CL INCLUDES PROBE AND JOG CAPACITANCE PARAMETER MEASUREMENT INFORMATION TEST TPLH/TPHL TPLZ/TPZL TPHZ/TPZH S1 Open 6V GND Memory FIGURE 2. VOLTAGE WAVEFORMS PULSE DURATION FIGURE 3. OUTPUT ENABLE TIMING 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 5 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers FIGURE 4. VOLTAGE SETUP AND HOLD TIMES 54BCT244 FIGURE 5. PROPAGATION DELAY TIMES INVERTING AND NON-INVERTING OUTPUTS Memory Figure Notes: 2. All input pulses are supplied by generators having the following characteristics: PRR < 10 MHz, ZO = 50, tr < 2.5 ns, tf < 2.5 ns. 3. 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. 4.The outputs are measured one at a time with one transition per measurement. 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 6 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers 54BCT244 Memory 20 PIN RAD-PAK(R) FLAT PACKAGE SYMBOL MIN A b c D E E1 E2 E3 e L Q S1 N 0.370 0.035 0.005 0.128 0.015 0.003 0.470 0.287 -0.155 0.030 DIMENSION NOM 0.141 0.017 0.005 0.480 0.295 -0.160 0.068 0.050BSC 0.380 0.039 0.007 20 0.390 0.042 -MAX 0.154 0.022 0.009 0.490 0.303 0.333 --- F20-01 Note: All dimensions in inches 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 7 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers 54BCT244 Important Notice: These data sheets are created using the chip manufacturer's published specifications. Maxwell Technologies verifies functionality by testing key parameters either by 100% testing, sample testing or characterization. The specifications presented within these data sheets represent the latest and most accurate information available to date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no responsibility for the use of this information. Maxwell Technologies' products are not authorized for use as critical components in life support devices or systems without express written approval from Maxwell Technologies. Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Technologies. Maxwell Technologies' liability shall be limited to replacement of defective parts. Memory 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 8 (c)2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers Product Ordering Options 54BCT244 Model Number 54BCT244 RP F X Feature Option Details Screening Flow Monolithic S = Maxwell Class S B = Maxwell Class B E = Engineering (testing @ +25C) I = Industrial (testing @ -55C, +25C, +125C) Memory Package F = Flat Pack Radiation Feature RP = RAD-PAK(R) package Base Product Nomenclature Octal Buffers/Drivers 1000608 12.19.01 Rev 5 All data sheets are subject to change without notice 9 (c)2001 Maxwell Technologies All rights reserved. |
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