SEMICONDUCTOR TECHNICAL DATA
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The MC74LCX16244 is a high performance, non–inverting 16–bit
buffer operating from a 2.7 to 3.6V supply. The device is nibble controlled.
Each nibble has separate Output Enable inputs which can be tied
together for full 16–bit operation. High impedance TTL compatible inputs
significantly reduce current loading to input drivers while TTL compatible
outputs offer improved switching noise performance. A VI specification of
5.5V allows MC74LCX16244 inputs to be safely driven from 5V devices.
The MC74LCX16244 is suitable for memory address driving and all TTL
level bus oriented transceiver applications.
4.5ns maximum propagation delays support high performance
applications. Current drive capability is 24mA at the outputs. The Output
Enable (OEn) inputs, when HIGH, disable the outputs by placing them in
a HIGH Z condition.
•
•
•
•
•
•
•
•
•
LOW–VOLTAGE
CMOS 16–BIT BUFFER
Designed for 2.7 to 3.6V VCC Operation
4.5ns Maximum tpd
5V Tolerant — Interface Capability With 5V TTL Logic
Supports Live Insertion and Withdrawal
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1201–01
IOFF Specification Guarantees High Impedance When VCC = 0V
LVTTL Compatible
LVCMOS Compatible
24mA Balanced Output Sink and Source Capability
Near Zero Static Supply Current in All Three Logic States (20µA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V;
Machine Model >200V
The MC74LCX16244 contains sixteen non–inverting buffers with
3–state 5V–tolerant outputs. The device is nibble controlled with each
nibble functioning identically, but independently. The control pins may be
tied together to obtain full 16–bit operation. The 3–state outputs are
controlled by an Output Enable (OEn) input for each nibble. When OEn is
LOW, the outputs are on. When OEn is HIGH, the outputs are in the high
impedance state.
PIN NAMES
Pins
Function
OEn
D0–D15
O0–O15
Output Enable Inputs
Inputs
Outputs
10/96
Motorola, Inc. 1996
1
REV 1
MC74LCX16244
OE1 1
48 OE2
O0 2
47 D0
O1 3
46 D1
GND 4
LOGIC DIAGRAM
45 GND
O2 5
44 D2
O3 6
43 D3
VCC 7
OE1
OE2
1
OE3
48
OE4
25
24
42 VCC
O4 8
41 D4
O5 9
40 D5
GND 10
D0:3
O0:3
D8:11
O8:11
D4:7
O4:7
D12:15
O12:15
39 GND
O6 11
38 D6
O7 12
37 D7
O8 13
36 D8
O9 14
35 D9
GND 15
34 GND
O10 16
33 D10
O11 17
32 D11
VCC 18
31 VCC
O12 19
30 D12
O13 20
29 D13
GND 21
28 GND
O14 22
27 D14
O15 23
26 D15
OE4 24
25 OE3
One of Four
OE1
D0:3
O0:3
OE2
D4:7
O4:7
OE3
D8:11
O8:11
OE4
D12:15
O12:15
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
L
H
H
L
H
H
L
H
H
H
X
Z
H
X
Z
H
X
Z
H
X
Z
H = High Voltage Level; L = Low Voltage Level; Z = High Impedance State; X = High or Low Voltage Level and Transitions Are Acceptable, for ICC
reasons, DO NOT FLOAT Inputs
MOTOROLA
2
LCX DATA
BR1339 — REV 2
MC74LCX16244
ABSOLUTE MAXIMUM RATINGS*
Symbol
Parameter
VCC
DC Supply Voltage
VI
DC Input Voltage
VO
DC Output Voltage
Value
Condition
Unit
–0.5 to +7.0
V
–0.5 ≤ VI ≤ +7.0
V
–0.5 ≤ VO ≤ +7.0
Output in 3–State
V
–0.5 ≤ VO ≤ VCC + 0.5
Note 1.
V
IIK
DC Input Diode Current
–50
VI < GND
mA
IOK
DC Output Diode Current
–50
VO < GND
mA
+50
VO > VCC
mA
IO
DC Output Source/Sink Current
±50
mA
ICC
DC Supply Current Per Supply Pin
±100
mA
IGND
DC Ground Current Per Ground Pin
±100
mA
TSTG
Storage Temperature Range
–65 to +150
°C
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is not implied.
1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Operating
Data Retention Only
Min
Typ
Max
Unit
2.0
1.5
3.3
3.3
3.6
3.6
V
0
5.5
V
0
0
VCC
5.5
V
VCC
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH
HIGH Level Output Current, VCC = 3.0V – 3.6V
–24
mA
IOL
LOW Level Output Current, VCC = 3.0V – 3.6V
24
mA
IOH
HIGH Level Output Current, VCC = 2.7V – 3.0V
–12
mA
IOL
LOW Level Output Current, VCC = 2.7V – 3.0V
12
mA
TA
Operating Free–Air Temperature
∆t/∆V
Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V,
VCC = 3.0V
(HIGH or LOW State)
(3–State)
–40
+85
°C
0
10
ns/V
DC ELECTRICAL CHARACTERISTICS
TA = –40°C to +85°C
Symbol
Characteristic
VIH
HIGH Level Input Voltage (Note 2.)
VIL
LOW Level Input Voltage (Note 2.)
VOH
HIGH Level Output Voltage
VOL
LOW Level Output Voltage
Condition
Min
2.7V ≤ VCC ≤ 3.6V
2.0
2.7V ≤ VCC ≤ 3.6V
Max
V
0.8
2.7V ≤ VCC ≤ 3.6V; IOH = –100µA
VCC – 0.2
VCC = 2.7V; IOH = –12mA
2.2
VCC = 3.0V; IOH = –18mA
2.4
VCC = 3.0V; IOH = –24mA
2.2
Unit
V
V
2.7V ≤ VCC ≤ 3.6V; IOL = 100µA
0.2
VCC = 2.7V; IOL= 12mA
0.4
VCC = 3.0V; IOL = 16mA
0.4
VCC = 3.0V; IOL = 24mA
0.55
V
2. These values of VI are used to test DC electrical characteristics only.
LCX DATA
BR1339 — REV 2
3
MOTOROLA
MC74LCX16244
DC ELECTRICAL CHARACTERISTICS (continued)
TA = –40°C to +85°C
Symbol
Characteristic
Condition
Min
Max
Unit
II
Input Leakage Current
2.7V ≤ VCC ≤ 3.6V; 0V ≤ VI ≤ 5.5V
±5.0
µA
IOZ
3–State Output Current
2.7 ≤ VCC ≤ 3.6V; 0V ≤ VO ≤ 5.5V;
VI = VIH or V IL
±5.0
µA
IOFF
Power–Off Leakage Current
VCC = 0V; VI or VO = 5.5V
10
µA
ICC
Quiescent Supply Current
2.7 ≤ VCC ≤ 3.6V; VI = GND or VCC
20
µA
2.7 ≤ VCC ≤ 3.6V; 3.6 ≤ VI or VO ≤ 5.5V
±20
µA
2.7 ≤ VCC ≤ 3.6V; VIH = VCC – 0.6V
500
µA
∆ICC
Increase in ICC per Input
AC CHARACTERISTICS (tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
TA = –40°C to +85°C
VCC = 3.0V to 3.6V
Symbol
Parameter
VCC = 2.7V
Waveform
Min
Max
Max
Unit
tPLH
tPHL
Propagation Delay
Input to Output
1
1.5
1.5
4.5
4.5
5.2
5.2
ns
tPZH
tPZL
Output Enable Time to
High and Low Level
2
1.5
1.5
5.5
5.5
6.3
6.3
ns
tPHZ
tPLZ
Output Disable Time From
High and Low Level
2
1.5
1.5
5.4
5.4
5.7
5.7
ns
tOSHL
tOSLH
Output–to–Output Skew
(Note 3.)
1.0
1.0
ns
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (tOSHL) or LOW–to–HIGH (tOSLH); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25°C
Symbol
Characteristic
Condition
VOLP
Dynamic LOW Peak Voltage (Note 4.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
Min
Typ
0.8
Max
Unit
V
VOLV
Dynamic LOW Valley Voltage (Note 4.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
0.8
V
4. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
CIN
Input Capacitance
COUT
Output Capacitance
CPD
Power Dissipation Capacitance
MOTOROLA
Condition
Typical
Unit
VCC = 3.3V, VI = 0V or VCC
7
pF
VCC = 3.3V, VI = 0V or VCC
8
pF
10MHz, VCC = 3.3V, VI = 0V or VCC
20
pF
4
LCX DATA
BR1339 — REV 2
MC74LCX16244
2.7V
Dn
1.5V
1.5V
0V
tPLH
tPHL
VOH
1.5V
On
1.5V
VOL
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
2.7V
1.5V
OEn
0V
tPZH
tPHZ
VCC
VOH – 0.3V
1.5V
On
≈ 0V
tPZL
tPLZ
≈ 3.0V
1.5V
On
VOL + 0.3V
GND
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 1. AC Waveforms
VCC
PULSE
GENERATOR
R1
DUT
CL
RT
TEST
6V
OPEN
GND
RL
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6V
Open Collector/Drain tPLH and tPHL
6V
tPZH, tPHZ
GND
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 2. Test Circuit
LCX DATA
BR1339 — REV 2
5
MOTOROLA
MC74LCX16244
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1201–01
ISSUE A
48X
K
K1
K REF
0.12 (0.005)
M
T U
S
V
ÉÉÉ
ÇÇÇ
ÇÇÇ
ÉÉÉ
S
T U
S
J J1
48
25
SECTION N–N
M
0.254 (0.010)
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH OR GATE BURRS
SHALL NOT EXCEED 0.15 (0.006) PER SIDE.
4. DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
5. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
6. DIMENSIONS A AND B ARE TO BE
DETERMINED AT DATUM PLANE –W–.
B
–U–
L
N
1
24
A
–V–
PIN 1
IDENT.
N
F
DETAIL E
D
C
M
0.25 (0.010)
–W–
0.076 (0.003)
–T– SEATING
DETAIL E
PLANE
G
DIM
A
B
C
D
F
G
H
J
J1
K
K1
L
M
MILLIMETERS
MIN
MAX
12.40
12.60
6.00
6.20
–––
1.10
0.05
0.15
0.50
0.75
0.50 BSC
0.37
–––
0.09
0.20
0.09
0.16
0.17
0.27
0.17
0.23
7.95
8.25
0_
8_
INCHES
MIN
MAX
0.488
0.496
0.236
0.244
–––
0.043
0.002
0.006
0.020
0.030
0.0197 BSC
0.015
–––
0.004
0.008
0.004
0.006
0.007
0.011
0.007
0.009
0.313
0.325
0_
8_
H
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◊
MOTOROLA
6
MC74LCX16244/D
LCX DATA
BR1339 — REV 2