Fairchild 74VHCT00A service manual

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74VHCT00A
Quad 2-Input NAND Gate

74VHCT00A Quad 2-Input NAND Gate

July 1997
Revised March 1999

General Description

The VHCT00A is an advanced hi gh-speed CMO S 2-Input
NAND Gate fabricated with silicon gate CMOS technology.
It achieves the high-speed operation similar to equi valent
Bipolar Schottky TTL while maintaining the CMOS low
power dissipation. The internal circuit is composed of 3
stages, including bu ffer output, which provide high noise
immunity and stable output.

Protection circuits ensu re that 0V to 7 V can be applied to
the input pins without reg ard to the supply voltage an d to
the output pins with V

device destruction due to mismatched supply and input/
output voltages. This dev ice can be use d to inte rfa ce 3V to

= 0V. These circuits prevent

CC

5V systems and two supply systems such as battery
backup.

Features

■ Hi gh spee d: tPD = 5.0 ns (typ) at TA = 25°C

■ High noise immunity: V

■ Power down protection is provided on all inputs and

outputs

■ Low noise: V

■ Low power dissipation:

I

CC

■ Pin and function compatible with 74HCT00

OLP

= 2 µA (max) at TA = 25°C

= 2.0V, VIL = 0.8V

IH

= 0.8V (max)

Ordering Code:

Order Number Package Number Package Description

74VHCT00AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
74VHCT00ASJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHCT00AMTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHCT00AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Surface mount pack ages are also available on Tape and Reel. Specify by appendi ng the suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

Pin Descriptions

Pin Names Description

, B

A

n

n

O

n

© 1999 Fairchild Semiconductor Corporation DS500023.prf www.fairchildsemi.com

Inputs
Outputs

Truth T able

ABO

LLH
LHH
HLH
HHL

Absolute Maximum Ratings(Note 1) Recommended Operating

Supply Voltage (VCC) −0.5V to +7.0V
DC Input Voltage (V
DC Output Voltage (V

74VHCT00A

(Note 2) −0.5V to V

) −0.5V to +7.0V

IN

)

OUT

(Note 3) −0.5V to 7.0V
Input Diode Current (I
Output Diode Current (I

) −20 mA

IK

)

OK

(Note 4) ±20 mA
DC Output Current (I

/GND Current (ICC) ±50 mA

DC V

CC

Storage Temperature (T
Lead Temperature (T

) ±25 mA

OUT

) −65°C to +150°C

STG

)

L

(Soldering, 10 seconds) 260°C

CC

+ 0.5V

Conditions

Supply Voltage (V
Input Voltage (V
Output Voltage (V

(Note 2) 0V to V

(Note 3) 0V to 5.5V
Operating Temperature (T
Input Rise and Fall Time (t

= 5.0V ± 0.5V 0 ns/V ∼ 20 ns/V

V

CC

Note 1: Absolute Maximum Ratings are values beyond which the device
may be damaged or ha ve its useful li fe impaire d. The datab ook specific a­tions should be met, without exception, to ensure that the system design is
reliable over its p ower supp ly, temperature, and ou tput/input loading vari­ables. Fairchild does not recom mend operation outs ide databook specifica­tions.

Note 2: HIGH or LOW state. I
observed.

Note 3: V
Note 4: V
Note 5: Unused inputs must be held HIGH or LOW. They may not float.

CC
OUT

= 0V.

(Note 5)

) 4.5V to 5.5V

CC

)0V to +5.5V

IN

)

OUT

) −40°C to +85°C

OPR

, tf)

r

absolute maximum rating must be

OUT

< GND, V

> VCC (Outputs Active)

OUT

DC Electrical Characteristics

Symbol Parameter

V

V

V

V

I
I
I

I

IH

IL

OH

OL

IN
CC
CCT

OFF

HIGH Level Input Voltage 4.5 2.0 2.0

LOW Level Input Voltage 4.5 0.8 0.8

HIGH Level Output Voltage 4.5 4.40 4.50 4.40 V VIN = VIHIOH = −50 µA

LOW Level Output Voltage 4.5 0.0 0.1 0.1 V VIN = VIHIOL = 50 µA

Input Leakage Current 0 − 5.5 ±0.1 ±1.0 µAVIN = 5.5V or GND
Quiescent Supply Current 5.5 2.0 20.0 µAVIN = VCC or GND
Maximum ICC/ Input

Output Leakage Current 0.0 0.5 5.0 µAV
(Power Down State)

V

CC

(V)

5.5 2.0 2.0

5.5 0.8 0.8

4.5 3.94 3.80 V or VILIOH = −8 mA

4.5 0.36 0.44 V or VILIOL = 8 mA

5.5 1.35 1.50 mA

TA = 25°CT

Min Typ Max Min Max

= −40°C to +85°C

A

Units Conditions

V

V

VIN = 3.4V
Other Inputs = VCC or GND

= 5.5V

OUT

CC

Noise Characteristics

V

Symbol Parameter

V

OLP

(Note 6)
V

OLV

(Note 6)
V

IHD

(Note 6)
V

ILD

(Note 6)

Note 6: Paramete r guaranteed by design.

Quiet Output Maximum Dynamic V

Quiet Output Minimum Dynamic V

Minimum HIGH Level Dynamic Input Voltage

Maximum LOW Level Dynamic Input Voltage

OL

OL

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CC

(V)

5.0 0.4 0.8 V CL = 50 pF

5.0 −0.4 −0.8 V CL = 50 pF

5.0 2.0 V CL = 50 pF

5.0 0.8 V CL = 50 pF

TA = 25°C

Typ Limit

Units Conditions