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M74HC590STN/a62avai8 BIT BINARY COUNTER REGISTER (3 STATE)


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M74HC590
8 BIT BINARY COUNTER REGISTER (3 STATE)
1/15August 2001 HIGH SPEED:
fMAX = 61 MHz (TYP.) at VCC = 6V LOW POWER DISSIPATION:
ICC = 4μA(MAX.) at TA=25°C HIGH NOISE IMMUNITY:NIH = VNIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE:OH | = IOL = 6mA (MIN) for QA ~ QH OUTPUT
|IOH| = IOL = 4mA (MIN) for RCO OUTPUT BALANCED PROPAGATION DELAYS: PLH ≅ t PHL WIDE OPERATING VOLTAGE RANGE:CC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 590
DESCRIPTION

The M74HC590 is an high speed CMOS 8-BIT
BINARY COUNTER REGISTER (3 STATE)
fabricated with silicon gate C2 MOS technology.
This device contains 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 positive
edge triggered. If the user wishes to connect both
clocks together, the counter state will always be
one count ahead of the register. Internal circuitry
prevents clocking from the clock enable. All inputs
are equipped with protection circuits against static
discharge and transient excess voltage.
M74HC590

8 BINARY COUNTER REGISTER
WITH 3 STATE OUTPUT
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
M74HC590
2/15
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE

X: Don’t Care
RCO = QA’·QB’·QC’·QD’·QE’·QF’·QG’·QH’ (QA’ to QH’ : INTERNAL OUTPUTS OF THE COUNTER)
LOGIC DIAGRAM
M74HC590
3/15
LOGIC DIAGRAM

This logic diagram has not be used to estimate propagation delays
M74HC590
4/15
TIMING CHART
M74HC590
5/15
ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
RECOMMENDED OPERATING CONDITIONS
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