Fairchild Semiconductor 74VCX16827MTDX, 74VCX16827MTD, 74VCX16827MEAX Datasheet

March 1998
Revised April 1999

74VCX16827 Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs

© 1999 Fairchild Semiconductor Corporation DS500131.prf www.fairchildsemi.com

74VCX16827
Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant

Inputs and Outputs

General Description

The VCX16827 contai ns twenty non-invert ing buffers with
3-STATE outputs to be employed as a memory and
address driver, clock driver, or bus oriented transmitter/
receiver carrying parity. The device is byte controlled. Each
byte has NOR output enables for maximum control flexibil­ity.

The 74VCX16827 is designed for low voltage (1.65V to

3.6V) V

CC

applications with I/O capability up to 3.6V.

The 74VCX16827 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain­ing low CMOS power dissipation.

Features

■ 1.65V–3.6V VCC supply operation

■ 3.6V tolerant inputs and outputs

■ t

PD

2.5 ns max for 3.0V to 3.6V V

CC

3.0 ns max for 2.3V to 2.7V VCC

6.0 ns max for 1.65V to 1.95V V

CC

■ Power-off high impedance inputs and outputs

■ Supports live insertion and withdrawal (Note 1)

■ Static Drive (I

OH/IOL

)

±24 mA @ 3.0V V

CC

±18 mA @ 2.3V V

CC

±6 mA @ 1.65V V

CC

■ Uses patented noise/EMI reduction circuitry

■ Latch-up performance exceeds 300 mA

■ ESD performance:

Human body model > 2000V
Machine model > 200V

Note 1: To ensure the high-impedance state d uring power up or power
down, OE

should be tied to VCC through a pull-up r esistor; the min imum
value of the res istor is d eter mine d by the cu rre nt-sou rcin g ca pa bility of t he
driver.

Ordering Code:

Devices also availab le on Tape and Reel. Specify by appendin g t he s uffix letter “X” to the ordering code.

Logic Symbol Pin Descriptions

Order Number Package Number Package Description

74VCX16827MTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Pin Names Description

OE

n

Output Enable Input (Active LOW)

I

0–I19

Inputs

O

0–O19

Outputs

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74VCX16827

Connection Diagram Tr uth Tables

H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial (HIGH or LOW, inputs may not float)
Z = High Impedance

Functional Description

The 74VCX16827 contains twenty non-inverting buffers
with 3-STATE outputs. The de vice is byte controlled with
each byte functioning i dentically, but independent of each
other. The control pins may be sh orted together to obtai n
full 16-bit operation. The 3-STA TE outputs are controlled by
Output Enable (OE

n

) inputs. When OE1, and OE2 are

LOW, O

0—O10

are in the 2- state mode. When e ither OE

1

or OE2 are HIGH, the standard outputs are in the high
impedance mode but this does not int erfere with enter ing

new data into the inpu ts. The same applies for byte two
with OE

3

and OE4.

Logic Diagrams

Inputs Outputs

OE

1

OE

2

I0–I

9

O0–O

9

LL L L
LL H H
HX X Z
XH X Z

Inputs Outputs

OE

3

OE

4

I0–I

9

O10–O

19

LL L L
LL H H
HX X Z
XH X Z

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74VCX16827

Absolute Maximum Ratings(Note 2) Recommended Operating

Conditions

(Note 4)

Note 2: The Absolute Maximum Ratings are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the Absolute Maximum Rat-

ings. The “Recommended Operating Conditions” table will define the condi­tions for actual device operation.

Note 3: I

O

Absolute Maximum Rating must be observed.

Note 4: Floating or unused inputs m us t be held HIGH or LOW.

DC Electrical Characteristics (2.7V < VCC ≤ 3.6V)

Note 5: Outputs disab led or 3-STATE only.

Supply Voltage (VCC) −0.5V to +4.6V
DC Input Voltage (V

I

) −0.5V to +4.6V

Output Voltage (V

O

)
Outputs 3-STATE −0.5V to +4.6V
Outputs Active (Note 3) −0.5V to V

CC

+ 0.5V

DC Input Diode Current (I

IK

) VI < 0V −50 mA

DC Output Diode Current (I

OK

)

V

O

< 0V −50 mA

V

O

> V

CC

+50 mA

DC Output Source/Sink Current

(I

OH/IOL

) ±50 mA

DC V

CC

or GND Current per

Supply Pin (I

CC

or GND) ±100 mA

Storage Temperature Range (T

STG

) −65°C to +150°C

Power Supply

Operating 1.65V to 3.6V

Data Retention Only 1.2V to 3.6V
Input Voltage −0.3V to +3.6V
Output Voltage (V

O

)

Output in Active States 0V to V

CC

Output in 3-State 0.0V to 3.6V
Output Current in I

OH/IOL

VCC = 3.0V to 3.6V ±24 mA

V

CC

= 2.3V to 2.7V ±18 mA

V

CC

= 1.65V to 2.3V ±6 mA

Free Air Operating Temperature

(T

A

) −40°C to +85°C

Minimum Input Edge Rate (∆t/∆V)

V

IN

= 0.8V to 2.0V, VCC = 3.0V 10 ns/V

Symbol Parameter Conditions

V

CC

Min Max Units

(V)

V

IH

HIGH Level Input Voltage 2.7 − 3.6 2.0 V

V

IL

LOW Level Input Voltage 2.7 − 3.6 0.8 V

V

OH

HIGH Level Output Voltage IOH = −100 µA2.7 − 3.6 VCC − 0.2 V

IOH = −12 mA 2.7 2.2 V
IOH = −18 mA 3.0 2.4 V
IOH = −24 mA 3.0 2.2 V

V

OL

LOW Level Output Voltage IOL = 100 µA2.7 − 3.6 0.2 V

IOL = 12 mA 2.7 0.4 V
IOL = 18 mA 3.0 0.4 V
IOL = 24 mA 3.0 0.55 V

I

I

Input Leakage Current 0 ≤ VI ≤ 3.6V 2.7 − 3.6 ±5.0 µA

I

OZ

3-STATE Output Leakage 0 ≤ VO ≤ 3.6V

2.7 − 3.6 ±10 µA

VI = VIH or V

IL

I

OFF

Power-OFF Leakage Current 0 ≤ (VI, VO) ≤ 3.6V 0 10 µA

I

CC

Quiescent Supply Current VI = VCC or GND 2.7 − 3.6 20 µA

VCC ≤ (VI, VO) ≤ 3.6V (Note 5) 2.7 − 3.6 ±20 µA

∆I

CC

Increase in ICC per Input VIH = VCC −0.6V 2.7 − 3.6 750 µA