Revised May 2005 MM74HC244 Octal 3-STATE Buffer General Description Features The MM74HC244 is a non-inverting buffer and has two active low enables (1G and 2G); each enable independently controls 4 buffers. This device does not have Schmitt trigger inputs. These 3-STATE buffers utilize advanced silicon-gate CMOS technology and are general purpose high speed non-inverting buffers. They possess high drive current outputs which enable high speed operation even when driving large bus capacitances. These circuits achieve speeds comparable to low power Schottky devices, while retaining the advantage of CMOS circuitry, i.e., high noise immunity, and low power consumption. All three devices have a fanout of 15 LS-TTL equivalent inputs. ■ Typical propagation delay: 14 ns ■ 3-STATE outputs for connection to system buses ■ Wide power supply range: 2–6V ■ Low quiescent supply current: 80 PA ■ Output current: 6 mA All inputs are protected from damage due to static discharge by diodes to VCC and ground. Ordering Code: Order Number Package Number MM74HC244WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MM74HC244SJ MM74HC244MTC MM74HC244N MTC20 N20A Package Description 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 also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Truth Table 1G 1A 1Y 2G 2A 2Y L L L L L L L H H L H H H L Z H L Z H H Z H H Z H HIGH Level L LOW Level Z High Impedance Top View © 2005 Fairchild Semiconductor Corporation DS005327 www.fairchildsemi.com MM74HC244 Octal 3-STATE Buffer September 1983 MM74HC244 Logic Diagram www.fairchildsemi.com 2 Recommended Operating Conditions 0.5 to 7.0V 1.5 to VCC 1.5V 0.5 to VCC 0.5V r 20 mA r 35 mA r 70 mA 65qC to 150qC Supply Voltage (VCC ) DC Input Voltage (VIN) DC Output Voltage (VOUT) Clamp Diode Current (IIK, IOK) DC Output Current, per pin (IOUT) DC VCC or GND Current, per pin (ICC) Storage Temperature Range (TSTG) Supply Voltage (VCC) 600 mW S.O. Package only 500 mW (VIN, VOUT) Operating Temperature Range (TA) Symbol VIH VIL Parameter Conditions V 85 qC (tr, tf) VCC 2.0V 1000 ns VCC 4.5V 500 ns VCC 6.0V 400 ns Note 2: Unless otherwise specified all voltages are referenced to ground. Note 3: Power Dissipation temperature derating — plastic “N” package: 12 mW/qC from 65qC to 85qC. VCC TA 25qC Typ TA 40 to 85qC TA 55 to 125qC Guaranteed Limits Units 2.0V 1.5 1.5 1.5 V Input Voltage 4.5V 3.15 3.15 3.15 V 6.0V 4.2 4.2 4.2 V Maximum LOW Level 2.0V 0.5 0.5 0.5 V 4.5V 1.35 1.35 1.35 V 6.0V 1.8 1.8 1.8 V Minimum HIGH Level VIN Output Voltage |IOUT | d 20 PA VIH or VIL 2.0V 2.0 1.9 1.9 1.9 V 4.5V 4.5 4.4 4.4 4.4 V 6.0V 6.0 5.9 5.9 5.9 VIH or VIL V V |IOUT | d 6.0 mA 4.5V 4.2 3.98 3.84 3.7 V |IOUT | d 7.8 mA 6.0V 5.7 5.4 5.34 5.2 V Maximum LOW Level VIN VIH or VIL Output Voltage |IOUT | d 20 PA VIN IIN VCC Minimum HIGH Level VIN VOL 0 40 (Note 4) Input Voltage VOH V Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur. 260qC DC Electrical Characteristics Units 6 Input Rise or Fall Times Lead Temperature (TL) (Soldering 10 seconds) Max 2 DC Input or Output Voltage Power Dissipation (PD) (Note 3) Min 2.0V 0 0.1 0.1 0.1 V 4.5V 0 0.1 0.1 0.1 V 6.0V 0 0.1 0.1 0.1 V V VIH or VIL |IOUT | d 6.0 mA 4.5V 0.2 0.26 0.33 0.4 |IOUT | d 7.8 mA 6.0V 0.2 0.26 0.33 0.4 V VIN VCC or GND 6.0V r 0.1 r 1.0 r1.0 PA Maximum 3-STATE VIN VIH, or VIL 6.0V r 0.5 r5 r10 PA Output Leakage VOUT 6.0V 8.0 80 160 PA Maximum Input Current IOZ ICC Current G Maximum Quiescent VIN Supply Current IOUT VCC or GND VIH VCC or GND 0 PA Note 4: For a power supply of 5V r 10% the worst case output voltages (VOH, and VOL) occur for HC at 4.5V. Thus the 4.5V values should be used when designing with this supply. Worst case VIH and VIL occur at VCC 5.5V and 4.5V respectively. (The VIH value at 5.5V is 3.85V.) The worst case leakage current (IIN, ICC, and IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used. 3 www.fairchildsemi.com MM74HC244 Absolute Maximum Ratings(Note 1) (Note 2) MM74HC244 AC Electrical Characteristics VCC 5V, TA 25qC, tr tf 6 ns Symbol tPHL, tPLH Parameter Conditions Maximum Propagation Typ Guaranteed Limit Units CL 45 pF 14 20 ns Maximum Enable Delay RL 1 k: 17 28 ns to Active Output CL 45 pF Maximum Disable Delay RL 1 k: 15 25 ns from Active Output CL 5 pF Delay tPZH, tPZL tPHZ, tPLZ AC Electrical Characteristics VCC 2.0V-6.0V, CL Symbol 50 pF, tr tf 6 ns (unless otherwise specified) Parameter tPHL, tPLH Maximum Propagation Delay tPZH, tPZL Maximum Output Enable Time tPHZ, tPLZ Maximum Output Disable Time Conditions Capacitance (Note 5) CIN 25qC TA 40 to 85qC TA 55 to 125qC Guaranteed Limits Units CL 50 pF 2.0V 58 115 145 171 150 pF 2.0V 83 165 208 246 ns CL 50 pF 4.5V 14 23 29 34 ns CL 150 pF 4.5V 17 33 42 49 ns CL 50 pF 6.0V 10 20 25 29 ns CL 150 pF 6.0V 14 28 35 42 ns RL 1 k: ns CL 50 pF 2.0V 75 150 189 224 ns CL 150 pF 2.0V 100 200 252 298 ns CL 50 pF 4.5V 15 30 38 45 ns CL 150 pF 4.5V 30 40 50 60 ns CL 50 pF 6.0V 13 26 32 38 ns CL 150 pF 6.0V 17 34 43 51 ns RL 1 k: 2.0V 75 150 189 224 ns CL 50 pF 4.5V 15 30 38 45 ns 6.0V 13 2.0V Rise and Fall Time Power Dissipation TA Typ CL tTLH, tTHL Maximum Output CPD VCC 26 32 38 ns 60 75 90 ns 4.5V 12 15 18 ns 6.0V 10 13 15 ns (per buffer) G VIH 12 G VIL 50 Maximum Input pF pF 5 10 10 10 pF 10 20 20 20 pF Capacitance COUT Maximum Output Capacitance Note 5: CPD determines the no load dynamic power consumption, PD IS CPD VCC f ICC. www.fairchildsemi.com CPD VCC2f ICC VCC, and the no load dynamic current consumption, 4 MM74HC244 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B 5 www.fairchildsemi.com MM74HC244 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 MM74HC244 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 7 www.fairchildsemi.com MM74HC244 Octal 3-STATE Buffer 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. 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