M74HC590 查看數據表（PDF） - STMicroelectronics

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M74HC590

8 BIT BINARY COUNTER REGISTER (3 STATE)

STMicroelectronics 

M54HC590

M74HC590

8 BIT BINARY COUNTER REGISTER (3 STATE)

. HIGH SPEED

fMAX = 62 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

. 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)

M 1R

(Micro Package)

C1R

(Chip Carrier)

ORDER CODES :

M 54HC 59 0F 1R

M 74H C5 90 M1 R

M 74HC 59 0B 1R

M 74H C5 90 C1 R

PIN CONNECTIONS (top view)

DESCRIPTION

The M54/74HC590 is a high speed CMOS 8-BIT BI-

NARY COUNTER REGISTER (3-STATE) fabri-

cated in silicon gate C2MOS 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 reg-

ister has parallel outputs. Separate clocks are pro-

vided 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 pre-

vents clocking from the clock enable.

All inputs are equipped with protection circuits

against static discharge and transient excess volt-

age.

NC =

No Internal

Connection

March 1993

1/14

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