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MC74HC244A Octal 3-State Noninverting Buffer/Line Driver/ Line Receiver
High-Performance Silicon-Gate CMOS
The MC74HC244A is identical in pinout to the LS244. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This octal noninverting buffer/line driver/line receiver is designed to be used with 3-state memory address drivers, clock drivers, and other bus-oriented systems. The device has noninverting outputs and two active-low output enables. The HC244A is similar in function to the HC240A.
http://onsemi.com MARKING DIAGRAMS
20 PDIP-20 N SUFFIX CASE 738
1
MC74HC244AN AWLYYWW 1 20
20
* * * * * * *
Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2 to 6 V Low Input Current: 1 A High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 136 FETs or 34 Equivalent Gates
LOGIC DIAGRAM
A1 A2 A3 A4 2 4 6 8 11 13 15 17 18 16 14 12 9 7 5 3 YA1 YA2 YA3
20 1
SOIC WIDE-20 DW SUFFIX CASE 751D 1 TSSOP-20 DT SUFFIX CASE 948G
HC244A AWLYYWW 20 HC 244A ALYW 1
20 1
A WL YY WW
= Assembly Location = Wafer Lot = Year = Work Week
PIN ASSIGNMENT
ENABLE A YA4 YB1 YB2 YB3 YB4 NONINVERTING OUTPUTS A1 YB4 A2 YB3 A3 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC ENABLE B YA1 B4 YA2 B3 YA3 B2 YA4 B1
DATA INPUTS
B1 B2 B3 B4
YB2 A4 YB1 GND
OUTPUT ENABLES
1 ENABLE A 19 ENABLE B
PIN 20 = VCC PIN 10 = GND
FUNCTION TABLE
Inputs Enable A, Enable B A, B Outputs YA, YB L H Z
ORDERING INFORMATION
Device MC74HC244AN MC74HC244ADW MC74HC244ADWR2 MC74HC244ADT MC74HC244ADTR2 1 Package PDIP-20 SOIC-WIDE SOIC-WIDE TSSOP-20 TSSOP-20 Shipping 1440 / Box 38 / Rail 1000 / Reel 75 / Rail 2500 / Reel
L L L H H X Z = high impedance
(c) Semiconductor Components Industries, LLC, 2000
March, 2000 - Rev. 8
Publication Order Number: MC74HC244A/D
MC74HC244A
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I III I I I I I II I I I I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I I I I II I I I I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIII I I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I IIIIIIIIIIIIIIIIIIIIIII III I II I I IIIIIIIIIIIIIIIIIIIII III I IIIIIIIIIIIIIIIIIIIIIII II I IIII I II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIIII II I II I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII II I
IIIIIIIIIIIIIIIIIIII II I IIII II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIII I II II I I I IIIIIIIIIIIIIIIIIIIIIII IIII IIIIIIIIIIIIIIIIIIIIIII II I II I I III II I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIIII II I III II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII IIIII I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I IIII IIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIII II IIIIIIIIIIIIIIIIIIIIIII
MAXIMUM RATINGS*
SymbolIIIIIIIIIIIIII Parameter VCC Vin DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) Value Unit - 0.5 to + 7.0III V V V - 0.5 to VCC + 0.5 - 0.5 to VCC + 0.5 20 35 75 750 500 450 Vout Iin DC Output Voltage (Referenced to GND) DC Input Current, per Pin mA mA mA Iout DC Output Current, per Pin ICC PD DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Plastic DIP SOIC Package TSSOP Package mW Tstg TL Storage Temperature - 65 to + 150 260
This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, Vin and Vout should be constrained to the range GND (Vin or Vout) VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open.
v
v
_C _C
Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP, SOIC, SSOP or TSSOP Package)
*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. Derating -- Plastic DIP: - 10 mW/_C from 65_ to 125_C SOIC Package: - 7 mW/_C from 65_ to 125_C TSSOP Package: - 6.1 mW/_C from 65_ to 125_C For high frequency or heavy load considerations, see Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D).
RECOMMENDED OPERATING CONDITIONS
Symbol VCC Parameter Min 2.0 0 Max 6.0 Unit V V
DC Supply Voltage (Referenced to GND)
Vin, Vout TA
DC Input Voltage, Output Voltage (Referenced to GND) Operating Temperature, All Package Types Input Rise and Fall Time (Figure 1)
VCC
- 55 0 0 0
+ 125 1000 500 400
_C
ns
tr, tf
VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
Guaranteed Limit
Symbol VIH
Parameter
Test Conditions
VCC V 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 2.0 4.5 6.0 3.0 4.5 6.0 2.0 4.5 6.0 3.0 4.5 6.0
- 55 to 25_C 1.5 2.1 3.15 4.2 0.5 0.9 1.35 1.8 1.9 4.4 5.9
v 85_C v 125_C
1.5 2.1 3.15 4.2 0.5 0.9 1.35 1.8 1.9 4.4 5.9 1.5 2.1 3.15 4.2 0.5 0.9 1.35 1.8 1.9 4.4 5.9 2.2 3.7 5.2 0.1 0.1 0.1 0.4 0.4 0.4
Unit V
Minimum High-Level Input Voltage
Vout = VCC - 0.1 V |Iout| 20 A
v v v
VIL
Maximum Low-Level Input Voltage
Vout = 0.1 V |Iout| 20 A
V
VOH
Minimum High-Level Output Voltage
Vin = VIH |Iout| 20 A Vin = VIH
V
|Iout| |Iout| |Iout|
v 2.4 mA v 6.0 mA v 7.8 mA v 2.4 mA v 6.0 mA v 7.8 mA
2.48 3.98 5.48 0.1 0.1 0.1
2.34 3.84 5.34 0.1 0.1 0.1
VOL
Maximum Low-Level Output Voltage
Vin = VIL |Iout| 20 A
v
V
Vin = VIL
|Iout| |Iout| |Iout|
0.26 0.26 0.26
0.33 0.33 0.33
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MC74HC244A
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
IIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I II IIIII II II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I III I I I I I II I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I I I I II I I II II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I III II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I I I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I III II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I I I I II I I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I I I II I I I I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I I I I II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIII I II I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIII I II II I I I II I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I III I I I I I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I
Guaranteed Limit Symbol Iin Parameter Test Conditions VCC V 6.0 6.0 - 55 to 25_C 0.1 0.5
v 85_C v 125_C
1.0 5.0 1.0 10
Unit A A
Maximum Input Leakage Current Maximum Three-State Leakage Current
Vin = VCC or GND
IOZ
Output in High-Impedance State Vin = VIL or VIH Vout = VCC or GND Vin = VCC or GND Iout = 0 A
ICC
Maximum Quiescent Supply Current (per Package)
6.0
4.0
40
160
A
NOTE: Information on typical parametric values and high frequency or heavy load considerations can be found in Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D).
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Guaranteed Limit
Symbol tPLH, tPHL
Parameter
VCC V 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 -- --
- 55 to 25_C 96 50 18 15
v85_C v125_C
115 60 23 20 135 70 27 23 165 80 33 28 165 80 33 28 90 32 18 15 10 15
Unit ns
Maximum Propagation Delay, A to YA or B to YB (Figures 1 and 3)
tPLZ, tPHZ
Maximum Propagation Delay, Output Enable to YA or YB (Figures 2 and 4)
110 60 22 19 110 60 22 19 60 23 12 10 10 15
140 70 28 24 140 70 28 24 75 27 15 13 10 15
ns
tPZL, tPZH
Maximum Propagation Delay, Output Enable to YA or YB (Figures 2 and 4)
ns
tTLH, tTHL
Maximum Output Transition Time, Any Output (Figures 1 and 3)
ns
Cin
Maximum Input Capacitance
pF pF
Cout
Maximum Three-State Output Capacitance (Output in High-Impedance State)
NOTE: For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D). Typical @ 25C, VCC = 5.0 V 34
CPD
Power Dissipation Capacitance (Per Buffer)*
pF
* Used to determine the no-load dynamic power consumption: P D = C PD V CC 2 f + I CC V CC . For load considerations, see Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D).
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MC74HC244A
SWITCHING WAVEFORMS
tr DATA INPUT A OR B tPLH OUTPUT YA OR YB tTLH 90% 50% 10% tTHL 90% 50% 10% tPHL OUTPUT Y tf VCC GND ENABLE A OR B 50% GND tPZL 50% tPZH OUTPUT Y 50% tPHZ 10% 90% tPLZ HIGH IMPEDANCE VOL VOH HIGH IMPEDANCE
VCC
Figure 1.
Figure 2.
TEST CIRCUITS
TEST POINT OUTPUT DEVICE UNDER TEST DEVICE UNDER TEST TEST POINT OUTPUT 1 k CONNECT TO VCC WHEN TESTING tPLZ AND tPZL. CONNECT TO GND WHEN TESTING tPHZ AND tPZH.
CL*
CL*
*Includes all probe and jig capacitance
*Includes all probe and jig capacitance
Figure 3. Test Circuit
Figure 4. Test Circuit
PIN DESCRIPTIONS
INPUTS A1, A2, A3, A4, B1, B2, B3, B4 (Pins 2, 4, 6, 8, 11, 13, 15, 17)
function as noninverting buffers. When a high level is applied, the outputs assume the high impedance state.
OUTPUTS YA1, YA2, YA3, YA4, YB1, YB2, YB3, YB4 (Pins 18, 16, 14, 12, 9, 7, 5, 3)
Data input pins. Data on these pins appear in noninverted form on the corresponding Y outputs, when the outputs are enabled.
CONTROLS Enable A, Enable B (Pins 1, 19)
Device outputs. Depending upon the state of the output-enable pins, these outputs are either noninverting outputs or high-impedance outputs.
Output enables (active-low). When a low level is applied to these pins, the outputs are enabled and the devices
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MC74HC244A
LOGIC DETAIL
TO THREE OTHER A OR B INVERTERS
ONE OF 8 INVERTERS VCC
DATA INPUT A OR B
YA OR YB
ENABLE A OR ENABLE B
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MC74HC244A
PACKAGE DIMENSIONS
PDIP-20 N SUFFIX PLASTIC DIP PACKAGE CASE 738-03 ISSUE E
11
-A-
20
B
1 10
C
L
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 0_ 15 _ 0.020 0.040 MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0_ 15_ 0.51 1.01
-T-
SEATING PLANE
K M E G F D
20 PL
N J 0.25 (0.010)
M 20 PL
0.25 (0.010) TA
M
M
TB
M
DIM A B C D E F G J K L M N
SO-20 DW SUFFIX CASE 751D-05 ISSUE F
D A
11 X 45 _
q
NOTES: 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS MIN MAX 2.35 2.65 0.10 0.25 0.35 0.49 0.23 0.32 12.65 12.95 7.40 7.60 1.27 BSC 10.05 10.55 0.25 0.75 0.50 0.90 0_ 7_
H
M
B
M
20
10X
0.25
E
1
10
h
20X
B 0.25
M
B TA
S
B
S
A
SEATING PLANE
DIM A A1 B C D E e H h L
L
18X
e
A1
q
T
C
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MC74HC244A
PACKAGE DIMENSIONS
20X
K REF
M
TSSOP-20 DT SUFFIX CASE 948E-02 ISSUE A
TU
S
0.15 (0.006) T U
S
0.10 (0.004)
V
S
K K1
2X
L/2
L
PIN 1 IDENT 1 10
B -U-
J J1
N 0.15 (0.006) T U
S
A -V- N F
C D 0.100 (0.004) -T- SEATING
PLANE
G
H
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IIII IIII IIII
SECTION N-N M DETAIL E DETAIL E
20
11
0.25 (0.010)
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. 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. 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE -W-. MILLIMETERS MIN MAX 6.40 6.60 4.30 4.50 --- 1.20 0.05 0.15 0.50 0.75 0.65 BSC 0.27 0.37 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 BSC 0_ 8_ INCHES MIN MAX 0.252 0.260 0.169 0.177 --- 0.047 0.002 0.006 0.020 0.030 0.026 BSC 0.011 0.015 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252 BSC 0_ 8_
-W-
DIM A B C D F G H J J1 K K1 L M
MC74HC244A
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PUBLICATION ORDERING INFORMATION
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