器件名称:
M74HC590
功能描述:
8 BIT BINARY COUNTER REGISTER (3 STATE)
文件大小:
296.02KB 共14页
简 介:
M54HC590 M74HC590 8 BIT BINARY COUNTER REGISTER (3 STATE) . . . . . . . . HIGH SPEED fMAX = 62 MHz (TYP.) AT VCC = 5 V LOW POWER DISSIPATION ICC = 4 A (MAX.) AT TA = 25 °C HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS (for RCO) 15 LSTTL LOADS (for QA QH) SYMMETRICAL OUTPUT IMPEDANCE IOH= IOL = 6 mA (MIN.) FOR QA ~ QH OUTPUT IOH= IOL = 4 mA (MIN.) FOR RCO OUTPUT BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V PIN AND FUNCTION COMPATIBLE WITH 54/74LS590 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HC590F1R M74HC590M1R M74HC590B1R M74HC590C1R PIN CONNECTIONS (top view) DESCRIPTION The M54/74HC590 is a high speed CMOS 8-BIT BINARY COUNTER REGISTER (3-STATE) fabri2 cated in silicon gate C MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. These devices each contain an 8-bit binary counter that feeds an 8-bit storage register. The storage register has parallel outputs. Separate clocks are provided for both the binary counter and storage register. The binary counter features a direct clear input CCLR and a count enable input CCKEN. For cascading, a ripple carry output RCO is provided. Expansion is easily accomplished by tying RCO of the first stage to CCKEN of the second stage, etc. Both the counter and register clocks are positiveedge triggered. If the user wishes to connec……
