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| 54BCT245 Octal Buffers Transceiver 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 * Bi-CMOS design * ESD protection exceeds 2000V DESCRIPTION: Maxwell Technologies' 54BCT245 octal bus transceiver features a greater than 100 krad (Si) total dose tolerance. The 54BCT245 is designed specifically for asynchronous communication between data buses. The 54BCT245 transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated. 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 space mission. In a GEO orbit, RAD-PAK provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S. 7.25.02 REV 5 All data sheets are subject to change without notice 1 (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver TABLE 1. PINOUT DESCRIPTION PIN 1 2-9 10 11-18 19 20 SYMBOL DIR A1-A8 GND B8-B1 OE VCC DESCRIPTION Directional Control Input Bi-directional I/O's with Tri-State Ground Bi-directional I/O's with Tri-State Output Enable Supply Power 54BCT245 TABLE 2. 54BCT245 ABSOLUTE MAXIMUM RATINGS 1 PARAMETER Supply Voltage Range Input Voltage Range Control Input 3/I/O Ports2 I/O Ports3 Voltage Range Applied to any Output in the Disable or Power-Off State Voltage Range Applied to any Output in High State Current Into Any Output in the Low State Total Power Dissipation @ TA = +55 Input Clamp Current Operating Temperature Range Storage Temperature Range C 3 SYMBOL VCC VI MIN -0.5 -0.5 -0.5 MAX 7.0 7.0 5.5 7.0 VCC 96 651 -30 125 150 UNIT Memory V V VO VO IO PD IIK (VI < 0) TA TS -0.5 -0.5 ----55 -65 V V mA mW mA C C 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(OL) ICC(OH) ICC(OD) VARIATION 10% of specified value in Table 5 10% of specified value in Table 5 10% of specified value in Table 5 7.25.02 Rev 1 All data sheets are subject to change without notice 2 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver 54BCT245 TABLE 4. 54BCT245 RECOMMENDED OPERATING CONDITIONS1 PARAMETER Supply Voltage High-Level Input Voltage Low-Level Input Voltage High-Level Output Current A Port B Port Low-Level Output Current A Port B Port Input Clamp Current Thermal Impedance -- Flat Package Operating Temperature SYMBOL VCC VIH VIL IOH MIN 4.5 2.0 ---3 -12 IOL -20 48 IIK ---55 -18 5.56 125 mA C/W C MAX 5.5 -0.8 UNIT V V V mA mA JC TA Memory 1. All unused control inputs must be held high or low to ensure proper device operation. TABLE 5. 54BCT245 DC ELECTRICAL CHARACTERISTICS (VCC = 5V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Input Clamp Voltage High-Level Output Voltage SYMBOL VIK VOH VCC = 4.5 V VCC = 4.5 V Port A Port B Low-Level Output Voltage Input Current High Level Input Low Level Input Current1 Current2 2 TEST CONDITIONS II = -18.0 mA IOH = -1 mA IOH = -3 mA IOH = -3 mA IOH = -12 mA IOL = 20 mA IOL = 48 mA VI = 5.5V VI = 2.7 V VIN = 0.5 V VO = 0 V VCC = 5.5 V VCC = 5.5 V SUBGROUPS 1, 2, 3 1, 2, 3 MIN -2.5 2.4 2.4 2 MAX -1.2 ----0.5 0.55 1 0.1 UNIT V V VOL II IIH IIL IOS ICCH ICCL VCC = 4.5 V Port A Port B VCC = 5.5 V A or B Port Control Input VCC = 5.5 V A or B Port Control Input VCC = 5.5 V A or B Port Control Input VCC = 5.5 V A Port B Port A to B A to B 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 --- V mA A A mA mA mA mA ----60 -100 --- 70 20 -0.65 -1.2 -150 -225 57 90 Short-circuit Output Current Supply Current, Outputs High Supply Current, Outputs Low 7.25.02 Rev 1 All data sheets are subject to change without notice 3 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver TABLE 5. 54BCT245 DC ELECTRICAL CHARACTERISTICS (VCC = 5V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Supply Current, Outputs Disabled to High Impedance State Input Capacitance Input Output Capacitance SYMBOL ICCZ Ci3 Cio3 VCC = 5.5 V VI = 2.5 V or Control Input VCC = 5.5 V 0.5V VCC = 5.5 V A to B B to A VI = 2.5 V or 0.5 V TEST CONDITIONS SUBGROUPS 1, 2, 3 1, 2, 3 54BCT245 MIN -MAX 15 7 9 12 UNIT mA pF pF 1. For I/O ports, the parameters IIH and IIL include the off-state output current. 2. Not more than one output should be shorted at one time and the duration of test shall not exceed one second. 3. Guaranteed by design. TABLE 6. 54BCT245 AC ELECTRICAL CHARACTERISTICS Memory (VCC = 5V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Propagation Delay Time from A or B to B or A 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 R1 = 500 TA = -55 to +125 C VCC = 5.0 V R1 = 500 TA = +25 C VCC = 4.5 to 5.5 V R1 = 500 TA = -55 to +125 C VCC = 5.0 V R1 = 500 TA= +25 C VCC = 4.5 to 5.5 V R1 = 500 TA = -55 to +125 C VCC = 5.0 V R1 = 500 TA= +25 C CL = 50 pF R2 = 500 CL = 50 pF R2 = 500 9, 10, 11 CL = 50 pF R2 = 500 CL = 50 pF R2 = 500 9, 10, 11 CL = 50 pF R2 = 500 CL = 50 pF R2 = 500 SUBGROUPS 9, 10, 11 MIN 1 1.5 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 MAX 7.2 7.6 6 6.6 11.2 11.8 9.4 10.2 9.7 9.6 8.3 7.8 ns ns UNIT ns 7.25.02 Rev 1 All data sheets are subject to change without notice 4 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver TABLE 7. FUNCTION TABLE INPUTS OPERATION OE L L H DIR L H X B data to A bus A data to B bus Isolation 54BCT245 FIGURE 1. LOAD CIRCUIT FOR OUTPUTS Memory Figure Note: 1.CL includes probe and jig capacitance. PARAMETER MEASUREMENT INFORMATION TEST TPLH/TPHL TPLZ/TPZL TPHZ/TPZH S1 Open 6V GND FIGURE 2. VOLTAGE WAVEFORMS PULSE DURATION 7.25.02 Rev 1 All data sheets are subject to change without notice 5 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver FIGURE 3. OUTPUT ENABLE TIMING 54BCT245 FIGURE 4. VOLTAGE SETUP AND HOLD TIMES Memory FIGURE 5. PROPAGATION DELAY TIMES INVERTING AND NON-INVERTING OUTPUTS 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. 7.25.02 Rev 1 All data sheets are subject to change without notice 6 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver 54BCT245 Memory 20 PIN RAD-PACK(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 7.25.02 Rev 1 All data sheets are subject to change without notice 7 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver 54BCT245 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 7.25.02 Rev 1 All data sheets are subject to change without notice 8 (c)2002 Maxwell Technologies All rights reserved. Octal Buffers Transceiver Product Ordering Options Model Number 54BCT245 RP F X Feature 54BCT245 Option Details Screening Flow Monolithic S = Maxwell Class S B = Maxwell Class B I = Industrial (testing @ -55C, +25C, +125C) E = Engineering (testing @ +25C) Memory Package F = Flat Package Radiation Feature RP = RAD-PAK(R) package Base Product Nomenclature Octal Buffers Transceiver 7.25.02 Rev 1 All data sheets are subject to change without notice 9 (c)2002 Maxwell Technologies All rights reserved. |
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