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74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
March 2007
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Features
ICC and IOZ reduced by 50% Guaranteed simultaneous switching noise level and
tm
General Description
The ACQ/ACTQ244 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver which provides improved PC board density. The ACQ/ ACTQ utilizes Fairchild Quiet SeriesTM technology to guarantee quiet output switching and improved dynamic threshold performance. FACT Quiet SeriesTM features GTOTM output control and undershoot corrector in addition to a split ground bus for superior performance.
dynamic threshold performance
Guaranteed pin-to-pin skew AC performance Improved latch-up immunity 3-STATE outputs drive bus lines or buffer memory
address registers Outputs source/sink 24mA Faster prop delays than the standard AC/ACT244
Ordering Information
Order Number
74ACQ244SC 74ACQ244SJ 74ACTQ244SC 74ACTQ244SJ 74ACTQ244QSC 74ACTQ244MSA
Package Number
M20B M20D M20B M20D MQA20 MSA20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Body 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Body 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter "X" to the ordering number.
Connection Diagram
Pin Description
Pin Names
OE1, OE2 I0-I 7 O0-O 7 Inputs Outputs
Description
3-STATE Output Enable Inputs
FACTTM, Quiet SeriesTM, FACT Quiet SeriesTM, and GTOTM are trademarks of Fairchild Semiconductor Corporation. (c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3 www.fairchildsemi.com
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Logic Symbol
IEE/IEC
Truth Tables
Inputs OE1
L L H
Outputs In
L H X
Pins 12, 14, 16, 18
L H Z
Inputs OE2
L L H
Outputs In
L H X
Pins 3, 5, 7, 9
L H Z
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 2
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Symbol
VCC IIK Supply Voltage DC Input Diode Current VI = -0.5V VI = VCC + 0.5V VI IOK DC Input Voltage DC Output Diode Current VO = -0.5V VO = VCC + 0.5V VO IO TSTG TJ DC Output Voltage
Parameter
Rating
-0.5V to +7.0V -20mA +20mA -0.5V to VCC + 0.5V -20mA +20mA -0.5V to VCC + 0.5V 50mA 50mA -65C to +150C 300mA 140C
DC Output Source or Sink Current Storage Temperature DC Latch-Up Source or Sink Current Junction Temperature
ICC or IGND DC VCC or Ground Current per Output Pin
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings.
Symbol
VCC Supply Voltage ACQ ACTQ VI VO TA V / t V / t Input Voltage Output Voltage Operating Temperature
Parameter
Rating
2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC -40C to +85C 125mV/ns 125mV/ns
Minimum Input Edge Rate, ACQ Devices: VIN from 30% to 70% of VCC, VCC @ 3.0V, 4.5V, 5.5V Minimum Input Edge Rate, ACTQ Devices: VIN from 0.8V to 2.0V, VCC @ 4.5V, 5.5V
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 3
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics for ACQ
TA = +25C Symbol
VIH
TA = -40C to +85C Units
V 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 2.46 3.76 4.76 0.1 0.1 0.1 0.44 0.44 0.44 1.0 75 -75 A mA mA A A V V V
Parameter
Minimum HIGH Level Input Voltage
VCC (V)
3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5
Conditions
VOUT = 0.1V or VCC - 0.1V VOUT = 0.1V or VCC - 0.1V IOUT = -50A
Typ.
1.5 2.25 2.75 1.5 2.25 2.75 2.99 4.49 5.49 2.1
Guaranteed Limits
3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 2.56 3.86 4.86
VIL
Maximum LOW Level Input Voltage
VOH
Minimum HIGH Level Output Voltage
VIN = VIL or VIH: 3.0 4.5 5.5 VOL Maximum LOW Level Output Voltage 3.0 4.5 5.5 VIN = VIL or VIH: 3.0 4.5 5.5 IIN
(3)
IOH = -12mA IOH = -24mA IOH = -24mA(1) 0.002 0.001 0.001 IOL = 12mA IOL = 24mA IOL = 24mA(1) VI = VCC, GND VOLD = 1.65V Max. VOHD = 3.85V Min. VIN = VCC or GND VI (OE) = VIL, VIH; VI = VCC, GND; VO = VCC, GND Figures 1 & 2(4) Figures 1 & 2(4)
(5)
IOUT = 50A
0.1 0.1 0.1 0.36 0.36 0.36 0.1
Maximum Input Leakage Current Minimum Dynamic Output Current(2) Maximum Quiescent Supply Current Maximum 3-STATE Leakage Current Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage
5.5 5.5 5.5 5.5 5.5
IOLD IOHD ICC(3) IOZ
4.0 0.25
40.0 2.5
VOLP VOLV VIHD VILD
5.0 5.0 5.0 5.0
1.1 -0.6 3.1 1.9
1.5 -1.2 3.5 1.5
V V V V
(5)
Notes: 1. All outputs loaded thresholds on input associated with output under test. 2. Maximum test duration 2.0ms, one output loaded at a time. 3. IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. 4. Max number of outputs defined as (n). Data Inputs are driven 0V to 5V. One output @ GND. 5. Max number of Data Inputs (n) switching. (n - 1) Inputs switching 0V to 5V (ACQ). Input-under-test switching: 5V to threshold (VILD), 0V to threshold (VIHD), f = 1MHz.
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3 www.fairchildsemi.com 4
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics for ACTQ
TA = +25C Symbol
VIH VIL VOH
TA = -40C to +85C Units
V V V 2.0 2.0 0.8 0.8 4.4 5.4 3.76 4.76 0.1 0.1 0.44 0.44 1.0 2.5 1.5 75 -75 A A mA mA mA A V V V V V
Parameter
Minimum HIGH Level Input Voltage Maximum LOW Level Input Voltage Minimum HIGH Level Output Voltage
VCC (V)
4.5 5.5 4.5 5.5 4.5 5.5
Conditions
VOUT = 0.1V or VCC - 0.1V VOUT = 0.1V or VCC - 0.1V IOUT = -50A VIN = VIL or VIH:
Typ.
1.5 1.5 1.5 1.5 4.49 5.49 2.0 2.0 0.8 0.8 4.4 5.4
Guaranteed Limits
4.5 5.5 VOL Maximum LOW Level Output Voltage 4.5 5.5
IOH = -24mA IOH = -24mA(6) 0.001 0.001 VIN = VIL or VIH: IOL = 24mA IOL = 24mA(6) VI = VCC, GND VI = VIL, VIH; VO = VCC, GND VI = VCC - 2.1V VOLD = 1.65V Max. VOHD = 3.85V Min. VIN = VCC or GND Figures 1 & 2(8) Figures 1 & 2(8)
(9)
3.86 4.86 0.1 0.1 0.36 0.36 0.1 0.25 0.6
IOUT = 50A
4.5 5.5 IIN
(3)
Maximum Input Leakage Current Maximum 3-STATE Leakage Current Maximum ICC/Input Minimum Dynamic Output Current(7) Maximum Quiescent Supply Current Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage
5.5 5.5 5.5 5.5 5.5 5.5 5.0 5.0 5.0 5.0
IOZ ICCT IOLD IOHD ICC
(3)
4.0 1.1 -0.6 1.9 1.2 1.5 -1.2 2.2 0.8
40.0
VOLP VOLV VIHD VILD
(9)
Notes: 6. All outputs loaded thresholds on input associated with output under test. 7. Maximum test duration 2.0ms, one output loaded at a time. 8. Max number of outputs defined as (n). Data Inputs are driven 0V to 3V. One output @ GND. 9. Max number of Data Inputs (n) switching. (n-1) Inputs switching 0V to 3V (ACTQ). Input-under-test switching: 3V to threshold (VILD), 0V to threshold (VIHD), f = 1 MHz.
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 5
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
AC Electrical Characteristics for ACQ
TA = +25C, CL = 50pF Symbol
tPHL, tPLH tPZL , tPZH tPHZ, tPLZ
TA = -40C to +85C, CL = 50pF Min.
2.0 1.5 2.5 1.5 1.0 1.0
Parameter
Propagation Delay Data to Output Output Enable Time Output Disable Time
VCC (V)(10)
3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0
Min.
2.0 1.5 2.5 1.5 1.0 1.0
Typ.
7.0 5.0 8.0 6.5 9.0 7.5 1.0 0.5
Max.
9.0 6.0 12.0 8.0 13.5 9.0 1.5 1.0
Max.
9.5 6.5 12.5 8.5 14.0 9.5 1.5 1.0
Units
ns ns ns ns
tOSHL, tOSLH Output to Output Skew Data to Output(11)
Note: 10. Voltage range 5.0 is 5.0V 0.5V. Voltage range 3.3 is 3.3V 0.3V. 11. 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.
AC Electrical Characteristics for ACTQ
TA = +25C, CL = 50pF Symbol
tPHL, tPLH tPZL, tPZH tPHZ, tPLZ
TA = -40C to +85C, CL = 50pF Min.
1.5 1.5 1.0
Parameter
Propagation Delay, Data to Output Output Enable Time Output Disable Time
VCC (V)(12)
5.0 5.0 5.0 5.0
Min.
1.5 1.5 1.0
Typ.
5.5 7.0 8.0 0.5
Max.
6.5 8.5 9.5 1.0
Max.
7.0 9.0 10.0 1.0
Units
ns ns ns ns
tOSHL, tOSLH Output to Output Skew, Data to Output(13) Notes: 12. Voltage range 5.0 is 5.0V 0.5V.
13. 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.
Capacitance
Symbol
CIN CPD
Parameter
Input Capacitance Power Dissipation Capacitance
Conditions
VCC = OPEN VCC = 5.0V
Typ.
4.5 70
Units
pF pF
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 6
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
FACT Noise Characteristics
The setup of a noise characteristics measurement is critical to the accuracy and repeatability of the tests. The following is a brief description of the setup used to measure the noise characteristics of FACT.
VOLP/VOLV and VOHP/V OHV:
Determine the quiet output pin that demonstrates the
Equipment:
Hewlett Packard Model 8180A Word Generator PC-163A Test Fixture Tektronics Model 7854 Oscilloscope
Procedure:
1. Verify Test Fixture Loading: Standard Load 50pF, 500. 2. Deskew the HFS generator so that no two channels have greater than 150ps skew between them. This requires that the oscilloscope be deskewed first. It is important to deskew the HFS generator channels before testing. This will ensure that the outputs switch simultaneously. 3. Terminate all inputs and outputs to ensure proper loading of the outputs and that the input levels are at the correct voltage. 4. Set the HFS generator to toggle all but one output at a frequency of 1MHz. Greater frequencies will increase DUT heating and effect the results of the measurement. 5. Set the HFS generator input levels at 0V LOW and 3V HIGH for ACT devices and 0V LOW and 5V HIGH for AC devices. Verify levels with an oscilloscope.
greatest noise levels. The worst case pin will usually be the furthest from the ground pin. Monitor the output voltages using a 50 coaxial cable plugged into a standard SMB type connector on the test fixture. Do not use an active FET probe. Measure VOLP and VOLV on the quiet output during the worst case active and enable transition. Measure VOHP and VOHV on the quiet output during the worst case active and enable transition. Verify that the GND reference recorded on the oscilloscope has not drifted to ensure the accuracy and repeatability of the measurements.
VILD and VIHD:
Monitor one of the switching outputs using a 50
coaxial cable plugged into a standard SMB type connector on the test fixture. Do not use an active FET probe. First increase the input LOW voltage level, VIL, until the output begins to oscillate or steps out a min of 2ns. Oscillation is defined as noise on the output LOW level that exceeds VIL limits, or on output HIGH levels that exceed VIH limits. The input LOW voltage level at which oscillation occurs is defined as VILD. Next decrease the input HIGH voltage level, VIH, until the output begins to oscillate or steps out a min of 2ns. Oscillation is defined as noise on the output LOW level that exceeds VIL limits, or on output HIGH levels that exceed VIH limits. The input HIGH voltage level at which oscillation occurs is defined as VIHD. Verify that the GND reference recorded on the oscilloscope has not drifted to ensure the accuracy and repeatability of the measurements.
Notes: 14. VOHV and VOLP are measured with respect to ground reference. 15. Input pulses have the following characteristics: f = 1MHz, tr = 3ns, tf = 3ns, skew < 150ps. Figure 1. Quiet Output Noise Voltage Waveforms Figure 2. Simultaneous Switching Test Circuit
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 7
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions
Dimensions are in inches (millimeters) unless otherwise noted.
Figure 3. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 8
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted.
Figure 4. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 9
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted.
Figure 5. 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide Package Number MQA20
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 10
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted.
Figure 6. 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 11
74ACQ244, 74ACTQ244 Quiet SeriesTM Octal Buffer/Line Driver with 3-STATE Outputs
TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx Across the board. Around the world. ActiveArray Bottomless Build it Now CoolFET CROSSVOLT CTLTM Current Transfer LogicTM DOME 2 E CMOS (R) EcoSPARK EnSigna FACT Quiet SeriesTM (R) FACT (R) FAST FASTr FPS (R) FRFET GlobalOptoisolator GTO
(R)
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Programmable Active Droop (R) QFET QS QT Optoelectronics Quiet Series RapidConfigure RapidConnect ScalarPump SMART START (R) SPM STEALTHTM SuperFET SuperSOT -3 SuperSOT -6 SuperSOT -8 SyncFETTM TCM (R) The Power Franchise
TM
TinyLogic TINYOPTO TinyPower TinyWire TruTranslation SerDes (R) UHC UniFET VCX Wire
(R)
TinyBoost TinyBuck
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD'S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only.
Rev. I24
2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
No Identification Needed
Full Production
Obsolete
Not In Production
(c)1989 Fairchild Semiconductor Corporation 74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com 12

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