M74HCT688B1R Просмотр технического описания (PDF) - STMicroelectronics

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M74HCT688B1R

8 BIT EQUALITY COMPARATOR

STMicroelectronics 

M74HCT688

8 BIT EQUALITY COMPARATOR

s HIGH SPEED:

tPD = 21ns (TYP.) at VCC = 4.5V

s LOW POWER DISSIPATION:

ICC = 4µA(MAX.) at TA=25°C

s COMPATIBLE WITH TTL OUTPUTS :

VIH = 2V (MIN.) VIL = 0.8V (MAX)

s SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 4mA (MIN)

s BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 688

DESCRIPTION

The M74HCT688 is an high speed CMOS 8 BIT

EQUALITY COMPARATOR fabricated with silicon

gate C2MOS technology.

The M74HCT688 compares bit for bit two 8-bit

words applied on inputs P0 - P7 and inputs Q0 -

Q7 and indicates whether or not they are equal. A

single active low enable is provided to facilitate

DIP

SOP

TSSOP

ORDER CODES

PACKAGE

TUBE

T&R

DIP

SOP

TSSOP

M74HCT688B1R

M74HCT688M1R M74HCT688RM13TR

M74HCT688TTR

cascading several packages to enable

comparison of words greater than 8 bits.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

September 2001

1/9

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