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74ACT08中文资料

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April 2001s HIGH SPEED: t PD = 4.5ns (TYP.) at V CC = 5V s

LOW POWER DISSIPATION:I CC = 2μA(MAX.) at T A =25°C

COMPATIBLE WITH TTL OUTPUTS V IH = 2V (MIN.), V IL = 0.8V (MAX.)s

50? TRANSMISSION LINE DRIVING CAPABILITY

SYMMETRICAL OUTPUT IMPEDANCE:|I OH | = I OL = 24mA (MIN)

BALANCED PROPAGATION DELAYS:t PLH ? t PHL

OPERATING VOLTAGE RANGE:V CC (OPR) = 4.5V to 5.5V

PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 08

IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74ACT08 is an advanced high -speed CMOS QUAD 2-INPUT AND GATE fabricated with sub-micron silicon gate and double-layer metal wiring C 2MOS tecnology.

The internal circuit is composed of 2 stages including buffer output, which enables high noise immunity and stable output.

The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels.

All inputs and outputs are equipped with protec-tion circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.

74ACT08

QUAD 2-INPUT AND GATE

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE TUBE T & R DIP 74ACT08B SOP 74ACT08M

74ACT08MTR TSSOP

74ACT08TTR

74ACT08

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INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

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.

RECOMMENDED OPERATING CONDITIONS

1) V IN from 0.8V to 2.0V

PIN No SYMBOL NAME AND FUNCTION 1, 4, 9, 121A to 4A Data Inputs 2, 5, 10, 131B to 4B Data Inputs 3, 6, 8, 11

1Y to 4Y Data Outputs 7

GND Ground (0V)

V CC

Positive Supply Voltage

A B Y L L L L H L H L L H

Symbol Parameter

Value Unit V CC Supply Voltage -0.5 to +7V V I DC Input Voltage -0.5 to V CC + 0.5V V O DC Output Voltage -0.5 to V CC + 0.5

V I IK DC Input Diode Current ± 20mA I OK DC Output Diode Current ± 20mA I O

DC Output Current

± 50mA I CC or I GND DC V CC or Ground Current

± 200mA T stg

Storage Temperature -65 to +150

°C T L

Lead Temperature (10 sec)

300

°C

Symbol Parameter

Value Unit V CC Supply Voltage 4.5 to 5.5V V I Input Voltage 0 to V CC V V O Output Voltage 0 to V CC V T op Operating Temperature

-55 to 125

°C dt/dv

Input Rise and Fall Time V CC = 4.5 or 5.5V (note 1)

ns/V

74ACT08

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DC SPECIFICATIONS

2) Incident wave switching is guaranteed on trasmission lines with impedances as low as 50?

AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, R L = 500 ?, Input t r = t f = 3ns)

(*) Voltage range is 5.0V ± 0.5V

CAPACITIVE CHARACTERISTICS

1) C PD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I CC(opr) = C PD x V CC x f IN + I CC /4 (per gate)

Symbol

Parameter

Test Condition

Value Unit

V CC (V)T A = 25°C -40 to 85°C -55 to 125°C Min.Typ.Max.

Min.Max.

V IH High Level Input Voltage

4.5V O = 0.1 V or V CC -0.1V 2.0 1.5 2.0 2.0V

5.5 2.0

1.5

2.0

V IL Low Level Input Voltage

4.5V O = 0.1 V or V CC -0.1V 1.50.80.80.8

5.5 1.50.8

0.8

V OH

High Level Output Voltage

4.5I O =-50 μA 4.4 4.49 4.4 4.4

5.5I O =-50 μA 5.4 5.49

5.4 5.44.5I O =-24 mA 3.86 3.76 3.7V

5.5

I O =-24 mA 4.86

4.76

4.7

V OL

Low Level Output Voltage

4.5I O =50 μA 0.0010.10.10.1

5.5I O =50 μA 0.001

0.10.10.14.5I O =24 mA 0.360.440.55.5

I O =24 mA 0.360.440.5I I Input Leakage Cur-rent

5.5V I = V CC or GND ± 0.1

± 1± 1μA I CCT Max I CC /Input 5.5V I = V CC - 2.1V 0.6

1.5 1.6mA I CC Quiescent Supply Current

5.5V I = V CC or GND 2

2080μA I OLD Dynamic Output Current (note 1, 2)

5.5

V OLD = 1.65 V max 7550mA I OHD

V OHD = 3.85 V min

-75

-50

mA Symbol

Parameter

Test Condition

Value

Unit

V CC (V)

T A = 25°C -40 to 85°C -55 to 125°C Min.Typ.Max.Min.Max.Min.Max.t PLH t PHL Propagation Delay

Time

5.0(*)

1.5

4.5

8.0

1.0

9.0

1.0

9.0

Symbol

Parameter

Test Condition

Value Unit

V CC (V)T A = 25°C -40 to 85°C -55 to 125°C Min.

Typ.Max.

Min.

Max.

Min.

Max.

C IN Input Capacitance 5.04pF C PD

Power Dissipation Capacitance (note 1)

5.0

f IN = 10MHz

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TEST CIRCUIT

C L = 50pF or equivalent (includes jig and probe capacitance)R L = R 1 = 500? or equivalent

R T = Z OUT of pulse generator (typically 50?)

WAVEFORM: PROPAGATION DELAYS

(f=1MHz; 50% duty cycle)

74ACT08

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