Revised November 1999 74ABT2244 Octal Buffer/Line Driver with 25Ω Series Resistors in the Outputs General Description Features The ABT2244 is an octal buffer and line driver designed to drive the capacitive inputs of MOS memory drivers, address drivers, clock drivers, and bus-oriented transmitters/receivers. ■ Guaranteed latchup protection ■ High impedance glitch-free bus loading during entire power up and power down cycle ■ Nondestructive hot insertion capability The 25Ω series resistors in the outputs reduce ringing and eliminate the need for external resistors. Ordering Code: Order Number 74ABT2244CSC 74ABT2244CSJ Package Number Package Description M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body M20D 74ABT2244CMSA MSA20 74ABT2244CMTC MTC20 74ABT2244CPC N20A 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Devices are also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Pin Descriptions Pin Names Schematic of Each Output Description OE1, OE2 Output Enable Input (Active LOW) I0–I7 Inputs O0–O7 Outputs Truth Table OE1 I0–3 O0–3 OE2 I4–7 O4–7 H X Z H X Z L H H L H H L L L L L L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance © 1999 Fairchild Semiconductor Corporation DS010991 www.fairchildsemi.com 74ABT2244 Octal Buffer/Line Driver with 25Ω Series Resistors in the Outputs May 1992 74ABT2244 Absolute Maximum Ratings(Note 1) Storage Temperature −65°C to +150°C Recommended Operating Conditions Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage −0.5V to +7.0V VCC Pin Potential to Ground Pin Input Voltage (Note 2) −0.5V to +7.0V Input Current (Note 2) −30 mA to +5.0 mA −40°C to +85°C +4.5V to +5.5V Minimum Input Edge Rate (∆V/∆t) Data Input 50 mV/ns Enable Input 20 mV/ns Voltage Applied to Any Output in the Disabled or Power-off State −0.5V to 5.5V in the HIGH State −0.5V to VCC Current Applied to Output in LOW State (Max) twice the rated IOL (mA) DC Latchup Source Current Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. −300 mA (Across Comm Operating Range) Over Voltage Latchup (I/O) 10V DC Electrical Characteristics Symbol Parameter Min Typ Max 2.0 Units VCC V Conditions VIH Input HIGH Voltage VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V Min IIN = −18 mA VOH Output HIGH V Min IOH = −3 mA V Min IOH = −32 mA VOL Output LOW Voltage 0.8 V Min IIH Input HIGH Current 1 2.5 2.0 1 IBVI Input HIGH Current Breakdown Test 7 IIL Input LOW Current −1 VID Input Leakage Test −1 IOZH Output Leakage Current IOZL Output Leakage Current IOS Output Short-Circuit Current ICEX 475 10 Recognized HIGH Signal Recognized LOW Signal µA Max µA Max µA Max V 0.0 IOL = 15 mA VIN = 2.7V (Note 4) VIN = VCC VIN = 7.0V VIN = 0.5V (Note 4) VIN = 0.0V IID = 1.9 µA All Other Pins Grounded µA 0 − 5.5V VOUT = 2.7V; OEn = 2.0V 0 − 5.5V VOUT = 0.5V; OEn = 2.0V −10 µA −275 mA Max VOUT = 0.0V Output HIGH Leakage Current 50 µA Max VOUT = VCC IZZ Bus Drainage Test 100 µA 0.0 VOUT = 5.5V; All Others GND ICCH Power Supply Current 50 µA Max All Outputs HIGH ICCL Power Supply Current 30 mA Max All Outputs LOW ICCZ Power Supply Current 50 µA Max OEn = V CC ICCT Additional Outputs Enabled 2.5 mA Outputs 3-STATE 2.5 mA Outputs 3-STATE 50 µA −100 All Others at VCC or GND ICC/Input VI = VCC − 2.1V Max Enable Input VI = VCC − 2.1V Data Input VI = VCC − 2.1V All Others at VCCor GND ICCD Dynamic ICC No Load mA/ (Note 4) 0.1 MHz Max Outputs OPEN OEn = GND (Note 3) One Bit Toggling, 50% Duty Cycle Note 2: Either voltage limit or current limit is sufficient to protect inputs. Note 3: For 8 bits toggling, ICCD < 0.8 mA/MHz. Note 4: Guaranteed, but not tested. www.fairchildsemi.com 2 (SOIC and SSOP Package) Symbol Parameter TA = +25°C TA = −40°C to +85°C VCC = +5V VCC = 4.5V–5.5V CL = 50 pF CL = 50 pF Min Typ Max Min tPLH Propagation 1.0 2.2 3.9 1.0 3.9 tPHL Delay Data to Outputs 1.0 2.9 4.4 1.0 4.4 tPZH Output Enable 1.5 3.7 6.0 1.5 6.0 tPZL Time 2.1 4.3 7.0 2.1 7.0 tPHZ Output Disable 1.7 3.5 5.8 1.7 5.8 tPLZ Time 1.7 3.7 5.8 1.7 5.8 Units Max ns ns ns Capacitance Symbol Parameter Typ Units Conditions TA = 25°C CIN Input Capacitance 5.0 pF VCC = 0V COUT (Note 5) Output Capacitance 9.0 pF VCC = 5.0V Note 5: COUT is measured at frequency f = 1 MHz, per MIL-STD-883, Method 3012. 3 www.fairchildsemi.com 74ABT2244 AC Electrical Characteristics 74ABT2244 AC Loading *Includes jig and probe capacitance FIGURE 2. Test Input Signal Levels FIGURE 1. Standard AC Test Load Amplitude Rep. Rate tw tr tf 3.0V 1 MHz 500 ns 2.5 ns 2.5 ns FIGURE 3. Test Input Signal Requirements AC Waveforms FIGURE 4. Propagation Delay Waveforms for Inverting and Non-Inverting Functions FIGURE 6. Propagation Delay, Pulse Width Waveforms FIGURE 5. 3-STATE Output HIGH and LOW Enable and Disable Times FIGURE 7. Setup Time, Hold Time and Recovery Time Waveforms www.fairchildsemi.com 4 74ABT2244 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body Package Number M20B 5 www.fairchildsemi.com 74ABT2244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D www.fairchildsemi.com 6 74ABT2244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA20 7 www.fairchildsemi.com 74ABT2244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 www.fairchildsemi.com 8 74ABT2244 Octal Buffer/Line Driver with 25Ω Series Resistors in the Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Package Number N20A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 9 www.fairchildsemi.com