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M74HC690

ST Microelectronics
Part Number M74HC690
Manufacturer ST Microelectronics
Description HC691/693 4 BIT BINARY COUNTER/REGISTER
Published May 6, 2005
Detailed Description M54/74HC690/691 M54/74HC692/693 HC690/692 DECADE COUNTER/REGISTER (3-STATE) HC691/693 4 BIT BINARY COUNTER/REGISTER (3-S...
Datasheet PDF File M74HC690 PDF File

M74HC690
M74HC690

Overview
M54/74HC690/691 M54/74HC692/693 HC690/692 DECADE COUNTER/REGISTER (3-STATE) HC691/693 4 BIT BINARY COUNTER/REGISTER (3-STATE) .
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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 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R DESCRIPTION The HC690/691/692/693 are high speed CMOS COUNTER/REGISTER fabricated in silicon gate C2MOS technology.
They have the same high speed performance of LSTTL combined with true CMOS low power consumption.
The internal circuit is composed of 3 stages including buffer output, which offers high noise immunity and stable output.
These devices incorporate a synchronous 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 ripplecarry output for easy expansion.
The register/counter select input, R/C, selects the counter when low or the register when high for the threestate outputs, QA, QB, QC, and QD.
If the LOAD input (LOAD) is held ”L” DATA input (AD) 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 ( synchronously to the counter clock for HC692/HC693, and asynchronously for HC690/HC691).
The internal March 1993 PIN CONNECTIONS (...


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