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M54HC690 数据表(PDF) 1 Page - STMicroelectronics |
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M54HC690 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 23 page  M54/74HC690/691 M54/74HC692/693 March 1993 HC691/693 4 BIT BINARY COUNTER/REGISTER (3-STATE) HC690/692 DECADE COUNTER/REGISTER (3-STATE) B1R (Plastic Package) ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) PIN CONNECTIONS (top view) NC = No Internal Connection . HIGH SPEED fMAX = 50 MHz (TYP.) at VCC =5 V . LOW POWER DISSIPATION ICC =4 µA (MAX.) at TA =25 °C . HIGH NOISE IMMUNITY VNIH =VNIL =28 % VCC (MIN.) . OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS (for QA to QD) 10 LSTTL LOADS (for RCO) . SYMMETRICAL OUTPUT IMPEDANCE IOH =IOL = 6 mA (MIN.) (for QA to QD) IOH =IOL = 4 mA (MIN.) (for RCO) . BALANCED PROPAGATION DELAYS tPLH =tPHL . WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V to 6 V . PIN AND FUNCTION COMPATIBLE WITH LSTTL 54/74LS690/691 The HC690/691/692/693 are high speed CMOS COUNTER/REGISTER fabricated in silicon gate C 2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power con- sumption. The internal circuit is composed of 3 stages includ- ing buffer output, which offers high noise immunity and stable output. These devices incorporate a syn- chronous counter, four-bit D-type register, and quadruple two-line to one-line multiplexers with three-state outputs in a single 20-pin package. The counter can be programmed from the data inputs and have enable P and enable T inputs and a ripple- carry output for easy expansion. The regis- ter/counter select input, R/C, selects the counter when low or the register when high for the three- state outputs, QA, QB, QC, and QD. If the LOAD input (LOAD) is held ”L” DATA input (A- D) are loaded in to the internal counter at positive edge of counter clock input (CCK). In the counter mode, internal counter counts up at the positive of the counter clock. If the counter clear input (CCLR) is held ”L”, the internal counter is cleared ( synchron- ously to the counter clock for HC692/HC693, and asynchronously for HC690/HC691). The internal DESCRIPTION 1/23 |
类似零件编号 - M54HC690 |
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类似说明 - M54HC690 |
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