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74ACT244

STMicroelectronics
Part Number 74ACT244
Manufacturer STMicroelectronics
Description OCTAL BUS BUFFER
Published Apr 3, 2005
Detailed Description ® 74ACT244 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) s s s s s s s s s HIGH SPEED: tPD = 4.5 ns (TY...
Datasheet PDF File 74ACT244 PDF File

74ACT244
74ACT244

Overview
® 74ACT244 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) s s s s s s s s s HIGH SPEED: tPD = 4.
5 ns (TYP.
) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 µA (MAX.
) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.
8V (MAX) 50Ω TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC (OPR) = 4.
5V to 5.
5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244 IMPROVED LATCH-UP IMMUNITY M (Micro Package) B (Plastic Package) ORDER CODES : 74ACT244B 74ACT244M 74ACT244T T (TSSOP Package) DESCRIPTION The ACT244 is an advanced CMOS OCTAL BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.
It is ideal for low power applications mantaining high speed operation similar to equivalent Bipolar Schottky TTL.
G control output governs four BUS BUFFERs.
This device is desibned to be used with 3 state memory address drivers, etc.
The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels.
All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS February 1999 1/9 74ACT244 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 FUNCT ION 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 OUTPUT An L H X Yn L H Z ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO ICC orIGND 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 Temperat...


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