54BCT244 MAXWELL | Alldatasheet
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All data sheets are subject to change without notice (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com Octal Buffers/Drivers 54BCT244 ©2001 Maxwell Technologies All rights reserved.
12.19.01 Rev 51000608
FEATURES:
- 3-state outputs drive bus lines or buffer memory address registers
- R AD-PAK® radiation-hardened against natural space radia- tion
- Total dose hardness: - >100 krad (Si), depending upon space mission
- Package: - 20-pin RAD-PAK® flat package
- Operating temperature range: -55 to 125°C
- P-N-P inputs reduce DC loading
- T y p i c a l V OLP (output ground bounce) - < 0.8 V at VCC=3.3 V, TA=25°C
- ESD protection exceeds 2000 V DESCRIPTION: Maxwell Technologies’ 54BCT244 octal buffers and line driv- ers 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® packaging technol- ogy incorporates radiation shie lding in the microcircuit pack- age. 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, R AD-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. Logic Diagram
TABLE 1. PINOUT DESCRIPTION
10 GND Ground
TABLE 2. 54BCT244 ABSOLUTE MAXIMUM RATINGS 1
- Stresses above the absolute maximum rating may cause per manent damage to the device. Extended operation at the maxi-
mum levels may degrade performance and affect reliability.
- The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
TABLE 3. DELTA LIMITS
TABLE 4. 54BCT244 RECOMMENDED OPERATING CONDITIONS1
- All unused control inputs must be held high or low to ensure proper device operation.
TABLE 5. 54BCT244 DC ELECTRICAL CHARACTERISTICS
- Not more than one output should be shorted at one time and the duration of test shall not exceed one second.
TABLE 6. 54BCT244 AC ELECTRICAL CHARACTERISTICS TABLE 7. FUNCTION TABLE
FIGURE 1. LOAD CIRCUIT FOR OUTPUTS
- CL INCLUDES PROBE AND JOG CAPACITANCE
FIGURE 2. VOLTAGE WAVEFORMS PULSE DURATION FIGURE 3. OUTPUT ENABLE TIMING
FIGURE 4. VOLTAGE SETUP AND HOLD TIMES FIGURE 5. PROPAGATION DELAY TIMES INVERTING AND NON-INVERTING OUTPUTS
- All input pulses are supplied by generators having the following characteristics: PRR < 10 MHz, ZO = 50Ω , tr < 2.5 ns, tf < 2.5
- 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.
7All data sheets are subject to change without notice ©2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers 54BCT244 Note: All dimensions in inches
20 PIN RAD-PAK® FLAT PACKAGE
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 -- N2 0
8All data sheets are subject to change without notice ©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 Tech- nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.
9All data sheets are subject to change without notice ©2001 Maxwell Technologies All rights reserved. Octal Buffers/Drivers 54BCT244 Feature Option Details54BCT244 RP F X Screening Flow Package Radiation Feature Base Product Nomenclature Monolithic S = Maxwell Class S B = Maxwell Class B E = Engineering (testing @ +25°C I = Industrial (testing @ -55°C, +25°C, +125°C) F = Flat Pack RP = R AD-PAK® package Octal Buffers/Drivers