54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers Memory Logic Diagram FEATURES: DESCRIPTION: • 3.3V ABT octal buffers/drivers with 3-state outputs • RAD-PAK® radiation-hardened against natural space radiation • Package: - 20 Pin RAD-PAK® flat package • Operating temperature range: -55 to 125° C • Supports mixed-mode signal operation - 5V input with 3.3V VCC • Supports unregulated battery operation down to 2.7V • Typical VOLP (output ground bounce) < 0.8V at VCC=3.3V, TA=25° C • Supports live insertion • Bus-hold data inputs eliminate the need for external pullup resistors Maxwell Technologies’ 54LVTH244A octal buffers/drivers micro-circuit is housed in a Rad-Pak® 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® 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. 01.19.07 Rev 1 (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com All data sheets are subject to change without notice 1 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers TABLE 1. PINOUT DESCRIPTION PIN SYMBOL DESCRIPTION 1, 19 1OE-2OE 2, 4, 6, 8 IA1-IA4 Input 3, 5, 7, 9 2Y4-2Y1 Output 10 GND Ground 11, 13, 15, 17 2A1-2A4 Input 12, 14, 16, 18 1Y4-1Y1 Output 20 VCC Output Enable Supply Voltage TABLE 2. 54LVTH244A ABSOLUTE MAXIMUM RATINGS1 SYMBOL MIN NOM MAX UNIT Supply Voltage Range VCC -0.5 -- 4.6 V Input Voltage Range 2 VI -0.5 -- 7.0 V Voltage Range Applied to Any Output in the High State or Power-Off State VO -0.5 -- 7.0 V Current into Any Output in the Low State IO -- -- 96 mA Current Into Any Output in the High State 3 IO -- -- 48 mA Input Clamp Current (VI < 0) IIK -- -- -50 mA Output Clamp Current (VO < 0) IOK -- -- -50 mA Total Power Dissipation at TA = 55 ° C PD -- -- 650 mW Thermal Resistance Tjc -- 11.46 -- -- Weight -- -- 5 -- -- Operating Temperature TA -55 -- 125 °C Storage Temperature Range TS -65 -- 150 °C Memory PARAMETER 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. 01.19.07 Rev 1 All data sheets are subject to change without notice 2 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers TABLE 3. DELTA LIMITS PARAMETER VARIATION ICC(OL) ±10% of specified value on Table 5 IOZH ±10% of specified value on Table 5 IOZL ±10% of specified value on Table 5 TABLE 4. 54LVTH244A RECOMMENDED OPERATING CONDITIONS 1 PARAMETER SYMBOL MIN Supply Voltage VCC High-level Input Voltage UNIT 2.7 3.6 V VIH 2.0 -- V Low-level Input Voltage VIL -- 0.8 V Input Voltage VI -- 5.5 V High-level Output Current IOH -- -24 mA Low-level Output Current IOL -- 48 mA ∆t/∆v -- 10 ns/V TA -55 125 °C Operating Temperature Memory MAX Input Transition Rise or Fall Rate NOM 1. All unused control inputs must be held high or low to ensure proper device operation. TABLE 5. 54LVTH244A DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±10%, TA = -55 ° C TO 125 ° C, UNLESS OTHERWISE SPECIFIED) PARAMETER SYMBOL TEST CONDITIONS MIN MAX UNIT II = -18mA -- -1.2 V IOH = -100µ A VCC -0.2 -- V VCC = 2.7V IOH = -8mA 2.4 -- VCC = 3V IOH = 24mA 2.0 -- VCC = 2.7V IOL = 100µ A -- 0.2 IOL = 24mA -- 0.5 IOL = 16mA -- 0.4 IOL = 32mA -- 0.5 IOL = 32mA -- 0.55 Input Clamp Voltage VIK VCC = 2.7 High-Level Output Voltage VOH VCC = 2.7V to 3.6V Low-Level Output Voltage VOL VCC = 3V 01.19.07 Rev 1 V All data sheets are subject to change without notice 3 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers TABLE 5. 54LVTH244A DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±10%, TA = -55 ° C TO 125 ° C, UNLESS OTHERWISE SPECIFIED) PARAMETER Input Current SYMBOL II TEST CONDITIONS VCC = 0 or 3.6V MIN VI = VCC UNIT 10 µA VCC = 3.6V VI = VCC or GND Control Inputs -- ±1 VCC = 3.6V VI = VCC Data Inputs -- 1 -- -5 75 -- -75 -- VI = 0 Hold Current MAX II(HOLD) VCC = 3V VI = 0.8V Data Inputs VI = 2V µA Output Disabled Leakage Current - High IOZH VCC = 3.6V, VO = 3V -- 5 µA Output Disabled Leakage Current - Low IOZL VCC = 3.6V, VO = 0.5V -- -5 µA IOZPU2 VCC = 0 to 1.5V, VO = 0.5V to 3V, OE = don’t care -- ±100 µA Power Down Current IOZPD2 VCC = 1.5V to 0, VO = 0.5V to 3V, OE = don’t care -- ±100 µA mA Supply Current ICC VCC = 3.6V Outputs high -- 0.19 IO = 0 Outputs low -- 5 Outputs disabled -- 0.19 -- 0.2 mA VI = VCC or GND Delta Supply Current ∆ICC 1 VCC = 3V to 3.6V, One input at VCC -0.6V, Other inputs Memory Power Up Current at VCC or GND Input Capacitance CI2 VI = 3V or 0 -- 8 pF Input Output Capacitance CO2 VO = 3V or 0 -- 15 pF 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 VCC = 2.7V UNIT MIN MAX MIN MAX Propogation Delay Time A to Y tPLH -- 4.7 -- 4.1 tPHL -- 4.4 -- 3.9 Output Enable Time OE to Y tPZH -- 6.9 -- 6.0 tPZL -- 5.4 -- 5.4 Output Disable OE to Y tPHZ -- 6.2 -- 5.8 tPLZ -- 5.5 -- 4.8 01.19.07 Rev 1 ns ns ns All data sheets are subject to change without notice 4 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers TABLE 7. FUNCTION TABLE (EACH BUFFER) INPUTS OUTPUT OE A Y L H H L L L H X Z FIGURE 1. LOAD CIRCUIT FOR OUTPUTS Memory Figure 1 Note: 1. CL includes probe and jog capacitance PARAMETER MEASUREMENT INFORMATION TEST S1 TPLH/TPHL Open TPLZ/TPZL 6V TPHZ/TPZH GND FIGURE 2. PULSE DURATION 01.19.07 Rev 1 All data sheets are subject to change without notice 5 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers FIGURE 3. SETUP AND HOLD TIMES 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 = 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. 01.19.07 Rev 1 All data sheets are subject to change without notice 6 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers Memory 20 PIN RAD-PAK® FLAT PACKAGE SYMBOL DIMENSION 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 0.050 BSC L 0.370 0.380 0.390 Q 0.035 0.039 0.042 S1 0.005 0.007 -- N 20 Note: All dimensions in inches 01.19.07 Rev 1 All data sheets are subject to change without notice 7 ©2007 Maxwell Technologies All rights reserved. 3.3V ABT 8-Bit Octal Buffers/Drivers 54LVTH244A 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 01.19.07 Rev 1 All data sheets are subject to change without notice 8 ©2007 Maxwell Technologies All rights reserved. 54LVTH244A 3.3V ABT 8-Bit Octal Buffers/Drivers Product Ordering Options Model Number 54LVTH244A 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 Pack Radiation Feature RP = RAD-PAK® package Base Product Nomenclature 3.3V ABT 8-Bit Octal Buffers/Drivers 01.19.07 Rev 1 All data sheets are subject to change without notice Memory Screening Flow 9 ©2007 Maxwell Technologies All rights reserved.