器件名称: 74VHCT244AM
功能描述: OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED
文件大小: 63.43KB 共8页
简 介:
74VHCT244A
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)
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HIGH SPEED: tPD = 3.9 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4 A (MAX.) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS: VIH = 2V (MIN), VIL = 0.8V (MAX) POWER DOWN PROTECTION ON INPUTS & OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 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 LOW NOISE VOLP = 0.9V (Max.)
M (Micro Package)
T (TSSOP Package)
ORDER CODES : 74VHCT244AM 74VHCT244AT
DESCRIPTION The 74VHCT244A is an advanced high speed CMOS OCTAL BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. G output enable governs four BUS BUFFERs.
This device is designed to be used with 3 state memory address drivers, etc. Power down protection is provided on all inputs and outputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V. 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
August 1999
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74VCHT244A
INPUT 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 FUN……
