74AC244 Datasheet | STMicroelectronics

DESCRIPTION protection circuits against static discharge, giving The AC244 is an advanced CMOS OCTAL BUS them 2KV ESD immunity and transient excess .. BUFFER (3-STATE) fabricated with sub-micron voltage. 2 silicon gate and double-layer metal wiring C MOS technology. It is ideal for low power applications s HIGH SPEED: t PD = 4 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 µA (MAX.) at TA = 25 o C HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.) 50Ω TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 m A (MIN) BALANCED PROPAGATION DELAYS: t PLH ≅ t PHL OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V PIN AND FUNCTION PATIBLE WITH 74 SERIES 244 IMPROVED LATCH-UP IMMUNITY B M (Plastic Package) (Micro Package) ORDER CODES : 74AC244B 74AC244M PIN CONNECTION AND IEC LOGIC SYMBOLS April 1997 1/8 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 SYMBOL 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 1Y1 to 1Y4 2G GND VCC NAME AND F UNCTIO N Output Enable Input Data Inputs Data Outputs Data Inputs Data Outputs Output Enabel Input Ground (0V) Positive Supply Voltage TRUTH TABLE INPUT G L L H X: ”H” or ”L” Z: High impedance OUT PUT An L H X Yn L H Z ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO ICC or IGND Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current DC VCC or Ground Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 ± 20 ± 20 ± 50 ± 400 -65 to +150 300 Unit V V V m A m A m A m A o o Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. REMENDED OPERATING CONDITIONS Symbol VCC VI VO Top dt/dv Supply Voltage Input Voltage Output Voltage Operating Temperature: Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5 V(note 1) Parameter...