Fairchild Semiconductor 74VCX16244MTDX, 74VCX16244MTD, 74VCX16244CW, 74ALVC16244MTDX, 74ALVC16244MTD Datasheet
October 1996
Revised April 1999
74VCX16244 Low Voltage 16-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs
© 1999 Fairchild Semiconductor Corporation DS012168.prf www.fairchildsemi.com
74VCX16244
Low Voltage 16-Bit Buffer/Line Driver with 3.6V Tolerant
Inputs and Outputs
General Description
The VCX16244 contai ns sixteen n on-invertin g buffers w ith
3-STATE outputs to be employed as a memory and
address driver, clock driver, or bus oriented transmitter/
receiver. The device is nibble (4-bit) controlled. Each nibble
has separate 3-STATE control inputs which can be shorted
together for full 16-bit operation.
The 74VCX16244 is designed for low voltage (1.65V to
3.6V) V
CC
applications with I/O capability up to 3.6V.
The 74VCX16244 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 @ 1.8V 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 in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering cod e.
Logic Symbol Pin Descriptions
Order Number Package Number Package Description
74VCX16244MTD MTD48 48-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–I15
Inputs
O
0–O15
Outputs
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74VCX16244
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 74VCX16244 contains sixteen non-inverting buffers
with 3-STATE outputs. T he device is nibble (4 bits) controlled with each nibble fun cti on ing ide nti ca lly, but independent of each other. The control pins may be shorted
together to obtain full 16- bit operation.The 3-STATE out-
puts are controlled by an Output Enable (OE
n
) input. When
OE
n
is LOW, the outputs are in the 2-state mode. When
OE
n
is HIGH, the standard outputs are in the high imped-
ance mode but this does not inte rfere with entering new
data into the inputs.
Logic Diagram
Inputs Outputs
OE
1
I0–I
3
O0–O
3
LL L
LH H
HX Z
Inputs Outputs
OE
3
I8-I
11
O8–O
11
LL L
LH H
HX Z
Inputs Outputs
OE
2
I4-I
7
O4-O
7
LL L
LH H
HX Z
Inputs Outputs
OE
4
I12-I
15
O12-O
15
LL L
LH H
HX Z
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74VCX16244
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) −0.5 V to +4.6V
DC Input Voltage (V
I
) −0.5V to +4.6V
Output Voltage (V
O
)
Outputs 3-STATED −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 µA 2.7–3.6 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 µA 2.7–3.6 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
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