54BCT245 Octal Buffers Transceiver Memory Logic Diagram FEATURES: DESCRIPTION: • 3-state outputs drive bus lines or buffer memory address registers • RAD-PAK® radiation-hardened against natural space radiation • Total dose hardness: - > 100 krad (Si), depending upon space mission • Package: - 20-pin RAD-PAK® flat package • Operating temperature range: -55 to +125°C • Bi-CMOS design • ESD protection exceeds 2000V 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® 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 (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com All data sheets are subject to change without notice 1 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver TABLE 1. PINOUT DESCRIPTION PIN SYMBOL DESCRIPTION 1 DIR 2-9 A1-A8 Bi-directional I/O’s with Tri-State 10 GND Ground 11-18 B8-B1 Bi-directional I/O’s with Tri-State 19 OE Output Enable 20 VCC Supply Power Directional Control Input TABLE 2. 54BCT245 ABSOLUTE MAXIMUM RATINGS 1 PARAMETER MIN MAX UNIT VCC -0.5 7.0 V -0.5 -0.5 7.0 5.5 Input Voltage Range Control Input 3/I/O Ports2 I/O Ports3 VI Voltage Range Applied to any Output in the Disable or Power-Off State VO -0.5 7.0 V Voltage Range Applied to any Output in High State VO -0.5 VCC V Current Into Any Output in the Low State IO -- 96 mA Total Power Dissipation @ TA = +55 ° C 3 PD -- 651 mW IIK (VI < 0) -- -30 mA Operating Temperature Range TA -55 125 °C Storage Temperature Range TS -65 150 °C Input Clamp Current Memory Supply Voltage Range SYMBOL V 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 VARIATION ICC(OL) ±10% of specified value in Table 5 ICC(OH) ±10% of specified value in Table 5 ICC(OD) ±10% of specified value in Table 5 7.25.02 Rev 1 All data sheets are subject to change without notice 2 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver TABLE 4. 54BCT245 RECOMMENDED OPERATING CONDITIONS1 PARAMETER SYMBOL MIN MAX UNIT Supply Voltage VCC 4.5 5.5 V High-Level Input Voltage VIH 2.0 -- V Low-Level Input Voltage VIL -- 0.8 V High-Level Output Current A Port B Port IOH -- Low-Level Output Current A Port B Port IOL Input Clamp Current IIK -- -18 mA ΘJC -- 5.56 °C/W TA -55 125 °C mA -3 -12 -- mA 20 48 Thermal Impedance — Flat Package Operating Temperature 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 SYMBOL TEST CONDITIONS SUBGROUPS MIN MAX UNIT Input Clamp Voltage VIK VCC = 4.5 V II = -18.0 mA 1, 2, 3 -- -1.2 V High-Level Output Voltage VOH VCC = 4.5 V Port A IOH = -1 mA 1, 2, 3 2.5 -- V IOH = -3 mA 2.4 -- IOH = -3 mA 2.4 -- IOH = -12 mA 2 -- -- 0.5 -- 0.55 Port B Low-Level Output Voltage VOL Input Current II VCC = 4.5 V Port A IOL = 20 mA Port B IOL = 48 mA VCC = 5.5 V A or B Port VI = 5.5V 1, 2, 3 1, 2, 3 1 Control Input High Level Input Current1 Low Level Input Current2 IIH VCC = 5.5 V A or B Port VCC = 5.5 V A or B Port VI = 2.7 V 1, 2, 3 VIN = 0.5 V 1, 2, 3 -- 70 µA -- 20 µA -- -0.65 mA Control Input Short-circuit Output Current 2 IOS VCC = 5.5 V A Port mA 0.1 Control Input IIL V -1.2 VO = 0 V 1, 2, 3 B Port -60 -150 -100 -225 mA Supply Current, Outputs High ICCH A to B VCC = 5.5 V 1, 2, 3 -- 57 mA Supply Current, Outputs Low ICCL A to B VCC = 5.5 V 1, 2, 3 -- 90 mA 7.25.02 Rev 1 All data sheets are subject to change without notice 3 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver TABLE 5. 54BCT245 DC ELECTRICAL CHARACTERISTICS (VCC = 5V ±10%, TA = -55 ° C TO 125 ° C, UNLESS OTHERWISE SPECIFIED) PARAMETER SYMBOL Supply Current, Outputs Disabled to High Impedance State ICCZ Input Capacitance Input Output Capacitance TEST CONDITIONS SUBGROUPS MIN MAX UNIT VCC = 5.5 V 1, 2, 3 -- 15 mA Ci3 VI = 2.5 V or Control Input VCC = 5.5 V 0.5V 1, 2, 3 Cio3 VCC = 5.5 V A to B 7 VI = 2.5 V or 0.5 V B to A pF 9 pF 12 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 SYMBOL Propagation Delay Time from A or B to B or A tPLH VCC = 4.5 to 5.5 V R1 = 500 Ω tPHL TA = -55 to +125 ° C tPLH VCC = 5.0 V R1 = 500 Ω tPHL TA = +25 ° C tPZH VCC = 4.5 to 5.5 V R1 = 500 Ω tPZL TA = -55 to +125 ° C tPZH VCC = 5.0 V R1 = 500 Ω tPZL TA= +25 ° C tPHZ VCC = 4.5 to 5.5 V R1 = 500 Ω tPLZ TA = -55 to +125 ° C tPHZ VCC = 5.0 V R1 = 500 Ω tPLZ TA= +25 ° C Output Enable Time OE to Yn Output Disable Time OE to Yn TEST CONDITIONS CL = 50 pF R2 = 500 Ω SUBGROUPS MIN MAX UNIT 9, 10, 11 1 7.2 ns 1.5 7.6 1 6 1.5 6.6 1.5 11.2 1.5 11.8 1.5 9.4 1.5 10.2 1.5 9.7 1.5 9.6 1.5 8.3 1.5 7.8 CL = 50 pF R2 = 500 Ω CL = 50 pF R2 = 500 Ω 9, 10, 11 CL = 50 pF R2 = 500 Ω CL = 50 pF R2 = 500 Ω CL = 50 pF R2 = 500 Ω 7.25.02 Rev 1 9, 10, 11 ns ns All data sheets are subject to change without notice 4 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver TABLE 7. FUNCTION TABLE INPUTS OPERATION OE DIR L L B data to A bus L H A data to B bus H X Isolation FIGURE 1. LOAD CIRCUIT FOR OUTPUTS Memory Figure Note: 1.CL includes probe and jig capacitance. PARAMETER MEASUREMENT INFORMATION TEST S1 TPLH/TPHL Open TPLZ/TPZL 6V TPHZ/TPZH GND FIGURE 2. VOLTAGE WAVEFORMS PULSE DURATION 7.25.02 Rev 1 All data sheets are subject to change without notice 5 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver FIGURE 3. OUTPUT ENABLE TIMING 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 = 50Ω, 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 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver Memory 20 PIN RAD-PACK® FLAT PACKAGE DIMENSION SYMBOL MIN NOM MAX A 0.128 0.141 0.154 b 0.015 0.017 0.022 c 0.003 0.005 0.009 D 0.470 0.480 0.490 E 0.287 0.295 0.303 E1 -- -- 0.333 E2 0.155 0.160 -- E3 0.030 0.068 -- e 0.050BSC L 0.370 0.380 0.390 Q 0.035 0.039 0.042 S1 0.005 0.007 -- N 20 F20-01 Note: All dimensions in inches 7.25.02 Rev 1 All data sheets are subject to change without notice 7 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver 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 ©2002 Maxwell Technologies All rights reserved. 54BCT245 Octal Buffers Transceiver Product Ordering Options Model Number 54BCT245 RP F X Option Details Feature Monolithic S = Maxwell Class S B = Maxwell Class B I = Industrial (testing @ -55°C, +25°C, +125°C) E = Engineering (testing @ +25°C) Package F = Flat Package Radiation Feature RP = RAD-PAK® package Base Product Nomenclature Octal Buffers Transceiver 7.25.02 Rev 1 All data sheets are subject to change without notice Memory Screening Flow 9 ©2002 Maxwell Technologies All rights reserved.