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| PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers 54LVTH244A Logic Diagram Memory FEATURES: * 3.3V ABT octal buffers/drivers with 3-state outputs * RAD-PAK(R) radiation-hardened against natural space radiation * Package: - 20 Pin RAD-PAK(R) flat package * Operating temperature range: -55 to 125C * Supports mixed-mode signal operation -5V Input and Output Voltages with 3.3V VCC * Supports mixed-mode signal operation - 5V input and output voltages with 3.3V VCC * Supports unregulated battery operation down to 2.7V * Typical VOLP (output ground bounce) < 0.8V at VCC=3.3V, TA=25C * Supports live insertion * Bus-hold data inputs eliminate the need for external pullup resistors DESCRIPTION: Maxwell Technologies' 54LVTH244A octal buffers/drivers micro-circuit is housed in a Rad-Pak(R) package. The 54LVTH244A is designed specifically for low voltage (3.3V) VCC operation, but with the capability to provide a TTL interface to a 5V system environment. The 54LVTH244A 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. The 54LVTH244A active bus hold circuitry is provided to prevent floating data inputs at a valid logic level and to eliminate the need for pullup resistors. 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. This product is available with packaging and screening up to Class S. 1000601 12.19.01 Rev 1 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. PRELIMINARY 3.3V ABT 8-Bit 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 IA1-IA4 2Y4-2Y1 GND 2A1-2A4 1Y4-1Y1 VCC Input Output Ground Input Output Supply Voltage DESCRIPTION Output Enable 54LVTH244A TABLE 2. 54LVTH244A ABSOLUTE MAXIMUM RATINGS1 PARAMETER Supply Voltage Range Input Voltage Range 2 SYMBOL VCC VI VO IO 3 MIN -0.5 -0.5 -0.5 ------55 -65 MAX 4.6 7.0 7.0 96 48 -50 -50 650 125 150 UNIT V V V mA mA mA mA Memory Voltage Range Applied to Any Output in the High State or Power-Off State Current into Any Output in the Low State Current Into Any Output in the High State Input Clamp Current (VI < 0) Output Clamp Current (VO < 0) Total Power Dissipation at TA = 55 Operating Temperature Storage Temperature Range C IO IIK IOK PD TA TS mW C C 1. 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 betond those indicated under "Recommended Operating Conditions" is not imp[lied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 3. This current flows only when the output is in the high state and VO > VCC. 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 2 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers TABLE 3. DELTA LIMITS PARAMETER ICC(OL) IOZH IOZL VARIATION 10% of specified value on Table 5 10% of specified value on Table 5 10% of specified value on Table 5 54LVTH244A TABLE 4. 54LVTH244A RECOMMENDED OPERATING CONDITIONS 1 PARAMETER Supply Voltage High-level Input Voltage Low-level Input Voltage Input Voltage High-level Output Current Low-level Output Current Input Transition Rise or Fall Rate Operating Temperature SYMBOL VCC VIH VIL VI IOH IOL TA MIN 2.7 2.0 ------55 MAX 3.6 -0.8 5.5 -24 48 10 125 UNIT V V V V mA mA ns/V C Memory t/v 1. All unused control inputs must be held high or low toensure proper device operation. TABLE 5. 54LVTH244A DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Input Clamp Voltage High-Level Output Voltage SYMBOL VIK VOH VCC = 2.7 VCC = 2.7V to 3.6V VCC = 2.7V VCC = 3V Low-Level Output Voltage VOL VCC = 2.7V VCC = 3V TEST CONDITIONS II = -18mA IOH = -100A IOH = -8mA IOH = 24mA IOL = 100A IOL = 24mA IOL = 16mA IOL = 32mA IOL = 32mA MIN -VCC -0.2 2.4 2.0 -----MAX -1.2 ---0.2 0.5 0.4 0.5 0.55 V UNIT V V 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 3 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers 54LVTH244A MIN Control Inputs Data Inputs Data Inputs ---75 -75 ----------MAX 10 1 1 -5 --5 -5 100 100 0.19 5 0.19 0.2 8 15 mA pF pF A A A A mA A UNIT A TABLE 5. 54LVTH244A DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V 10%, TA = -55 C TO 125 C, UNLESS OTHERWISE SPECIFIED) PARAMETER Input Current SYMBOL II VCC = 0 or 3.6V VCC = 3.6V VCC = 3.6V Hold Current Output Disabled Leakage Current - High Output Disabled Leakage Current - Low Power Up Current Power Down Current Supply Current II(HOLD) VCC = 3V IOZH IOZL IOZPU2 IOZPD ICC 2 TEST CONDITIONS VI = 5.5V VI = VCC or GND VI = VCC VI = 0 VI = 0.8V VI = 2V VCC = 3.6V, VO = 3V VCC = 3.6V, VO = 0.5V VCC = 0 to 1.5V, VO = 0.5V to 3V, OE = don't care VCC = 1.5V to 0, VO = 0.5V to 3V, OE = don't care VCC = 3.6V IO = 0 VI = VCC or GND Outputs high Outputs low Outputs disabled Memory Delta Supply Current Input Capacitance Input Output Capacitance ICC 1 VCC = 3V to 3.6V, One input at VCC -0.6V, Other inputs at VCC or GND CI2 CO 2 VI = 3V or 0 VO = 3V or 0 1. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. 2. Guaranteed by design. TABLE 6. 54LVTH244A AC ELECTRICAL CHARACTERISTICS (TA = -55 C TO 125 C, CL = 50 PF, UNLESS OTHERWISE SPECIFIED) PARAMETER SYMBOL VCC = 3.3V 0.3V MIN Propogation Delay Time A to Y Output Enable Time OE to Y Output Disable OE to Y tPLH tPHL tPZH tPZL tPHZ tPLZ ------MAX 4.7 4.4 6.9 5.4 6.2 5.5 12.19.01 Rev 1 VCC = 2.7V MIN ------MAX 4.1 3.9 6.0 5.4 5.8 4.8 UNIT ns ns ns 1000601 All data sheets are subject to change without notice 4 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers TABLE 7. FUNCTION TABLE (EACH BUFFER) INPUTS OE l L H A H L X OUTPUT Y H L Z 54LVTH244A FIGURE 1. LOAD CIRCUIT FOR OUTPUTS Memory Figure Note: 1. CL includes probe and jog capacitance PARAMETER MEASUREMENT INFORMATION TEST TPLH/TPHL TPLZ/TPZL TPHZ/TPZH S1 Open 6V GND FIGURE 2. PULSE DURATION 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 5 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers FIGURE 3. SETUP AND HOLD TIMES 54LVTH244A FIGURE 4.PROPAGATION DELAY TIMES INVERTING AND NON-INVERTING OUTPUTS Memory FIGURE 5. OUTPUT ENABLE TIMING 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. 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 6 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers 54LVTH244A 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 0.050 BSC 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 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 7 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers Important Notice: 54LVTH244A 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 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 8 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT 8-Bit Octal Buffers/Drivers Product Ordering Options Model Number 54LVTH244A RP F X Feature 54LVTH244A 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 3.3V ABT 8-Bit Octal Buffers/Drivers 1000601 12.19.01 Rev 1 All data sheets are subject to change without notice 9 (c)2001 Maxwell Technologies All rights reserved. |
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