Fairchild Semiconductor 74ACTQ245SC, 74ACTQ245QSCX, 74ACTQ245QSC, 74ACTQ245PC, 74ACTQ245MTCX Datasheet
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© 1999 Fairchild Semiconductor Corporation DS010236 www.fairchildsemi.com
July 1989
Revised November 1999
74ACQ245 • 74ACTQ245 Quiet Series Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs
74ACQ245 • 74ACTQ245
Quiet Series Octal Bidirectional Transceiver
with 3-STATE Inputs/Outputs
General Description
The ACQ/ACTQ245 contains eight non-inverting bidirectional bu ffers with 3-S TA T E o u t pu t s an d i s intended for b us oriented applications. Current sinking capability is 24 mA at
both the A and B p orts. The Transmit/Receive (T/R) input
determines the directi on of data flow through the b idirectional transceiver. Transmit (active-HIGH) enables data
from A Ports to B Ports; Receive (active-LOW) enables
data from B Ports to A Ports. The Output Enable input,
when HIGH, disables both A and B ports by placing them in
a HIGH Z condition.
The ACQ/ACTQ utilizes Fairchild Quiet Series technology to guarantee quiet output switching and improve
dynamic threshold perf ormance. FACT Quiet Series fe atures GTO output control and undershoot corrector in
addition to a split ground bus for superior performance.
Features
■ ICC and IOZ reduced by 5 0%
■ Guaranteed simultaneous switching noise level and
dynamic threshold performan ce
■ 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 24 mA
■ Faster prop delays than the standard ACT245
Ordering Code:
Device also available in Tape and Reel. Specify by appending s uffix let te r “X” to the ordering code.
FACT, Qui et Series , FACT Quiet Series, an d GTO are trademarks of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74ACQ245SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACQ245SJ M20D 20-Lead Small Outline Package (SOP) EIAJ TYPE II, 5.3mm Wide
74ACQ245PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACTQ245SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACTQ245SJ M20D 20-Lead Small Outline Package (SOP) EIAJ TYPE II, 5.3mm Wide
74ACTQ245QSC MQA20 20-Lead Quarter Size Outline Packag e (Q SOP ), JED EC MO -13 7, 0.15 0” Wide
74ACTQ245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACTQ245PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
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74ACQ245 • 74ACTQ245
Connection Diagram
Logic Symbols
IEEE/IEC
Pin Descriptions
Tr uth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Pin Names Description
OE Output Enable Input
T/R
Transmit/Receive Input
A
0–A7
Side A 3-STATE Inputs or 3-STATE Outputs
B
0–B7
Side B 3-STATE Inputs or 3-STATE Outputs
Inputs
Outputs
OE
T/R
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X HIGH-Z State
3 www.fairchildsemi.com
74ACQ245 • 74ACTQ245
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: Absolute max imum ratings are t hose values bey ond which damage
to the device may occu r. The databook spe cificatio ns shou ld be met, wit hout exception, to ensure that the system de sign is relia ble over its p ower
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACT circuits outside da t abook specifications.
DC Electrical Characteristics for ACQ
Supply Voltage (VCC) −0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= −0.5V −20 mA
V
I
= VCC + 0.5V +20 mA
DC Input Voltage (V
I
) −0.5V to VCC + 0.5V
DC Output Diode Current (I
OK
)
V
O
= −0.5V −20 mA
V
O
= VCC + 0.5V +20 mA
DC Output Voltage (V
O
) −0.5V to VCC + 0.5V
DC Output Source
or Sink Current (I
O
) ±50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
) ±50 mA
Storage Temperature (T
STG
) −65°C to +150°C
DC Latch-Up Source or
Sink Current ±300 mA
Junction Temperature (T
J
)
PDIP 140°C
Supply Voltage (V
CC
)
ACQ 2.0V to 6.0V
ACTQ 4.5V to 5.5V
Input Voltage (V
I
)0V to V
CC
Output Voltage (VO)0V to V
CC
Operating Temperature (TA) −40°C to +85°C
Minimum Input Edge Rate ∆V/∆t
ACQ Devices
V
IN
from 30% to 70% of V
CC
VCC @ 3.0V, 4.5V, 5.5V 125 mV/ ns
Minimum Input Edge Rate ∆V/∆t
ACTQ Devices
V
IN
from 0.8V to 2.0V
V
CC
@ 4.5V, 5.5V 125 mV/ns
Symbol Parameter
V
CC
TA = +25°CT
A
= −40°C to +85°C
Units Conditions
(V) Typ Guaranteed Limits
V
IH
Minimum HIGH Level 3.0 1.5 2.1 2.1 V
OUT
= 0.1V
Input Voltage 4.5 2.25 3.15 3.15 V or VCC − 0.1V
5.5 2.75 3.85 3.85
V
IL
Maximum LOW Level 3.0 1.5 0.9 0.9 V
OUT
= 0.1V
Input Voltage 4.5 2.25 1.35 1.35 V or VCC − 0.1V
5.5 2.75 1.65 1.65
V
OH
Minimum HIGH Level 3.0 2.99 2.9 2.9
Output Voltage 4.5 4.49 4.4 4.4 V I
OUT
= −50 µA
5.55.495.4 5.4
VIN = VIL or V
IH
3.0 2.56 2.46 IOH = −12 mA
4.5 3.86 3.76 V I
OH
= −24 mA
5.5 4.86 4.76 I
OH
= −24 mA (Note 2)
V
OL
Maximum LOW Level 3.0 0.002 0.1 0.1
Output Voltage 4.5 0.001 0.1 0.1 V I
OUT
= 50 µA
5.5 0.001 0.1 0.1
VIN = VIL or V
IH
3.0 0.36 0.44 IOL = 12 mA
4.5 0.36 0.44 V IOL = 24 mA
5.5 0.36 0.44 IOL = 24 mA (Note 2)
I
IN
Maximum Input
5.5 ±0.1 ±1.0 µAVI = VCC, GND
(Note 4) Leakage Current
I
OLD
Minimum Dynamic 5.5 75 mA V
OLD
= 1.65VMax
I
OHD
Output Current (Note 3) 5.5 −75 mA V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5 4.0 40.0 µA
VIN = V
CC
(Note 4) Supply Current or GND
I
OZT
Maximum I/O VI (OE) = VIL, V
IH
Leakage Current 5.5 ±0.3 ±3.0 µAVI = VCC, GND
VO = VCC, GND
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74ACQ245 • 74ACTQ245
DC Electrical Characteristics for ACQ (Continued)
Note 2: All outputs loaded; thresholds on input assoc iat ed with output under tes t.
Note 3: Maximum test duratio n 2. 0 ms, one output loaded at a time.
Note 4: I
IN
and ICC @ 3.0V are guaranteed to be less than or equa l to th e respective limit @ 5.5V VCC.
Note 5: DIP package .
Note 6: Max number of outputs defined as (n). Data Inputs are driven 0V to 5V; one output @ GND.
Note 7: Max number of Data Inputs (n) switching. (n−1) Inputs switching 0V to 5V (ACQ). Input-under-test switching: 5V to threshold (V
ILD
),
0V to threshold (V
IHD
), f = 1 MHz.
DC Electrical Characteristics for ACTQ
Note 8: All outputs loaded; thresholds on input assoc iat ed with output under tes t.
Note 9: Maximum test duratio n 2. 0 ms, one output loaded at a time.
Note 10: DIP package.
Note 11: Max number of outputs defined as (n). n−1 Data Inputs are driven 0V to 3V; one outp ut @ GND.
Note 12: Max number of Data Inputs (n) switching. (n−1) Inputs switching 0V to 3V (ACTQ). Input-under-test switching: 3V to threshold (V
ILD
),
0V to threshold (V
IHD
) f = 1 MHz.
Symbol Parameter
V
CC
TA = +25°CT
A
= −40°C to +85°C
Units Conditions
(V) Typ Guaranteed Limits
V
OLP
Quiet Output
5.0 1.1 1.5 V
Figure 1, Figure 2
Maximum Dynamic V
OL
(Note 5)(Note 6)
V
OLV
Quiet Output
5.0 −0.6 −1.2 V
Figure 1, Figure 2
Minimum Dynamic V
OL
(Note 5)(Note 6)
V
IHD
Minimum HIGH Level
5.0 3.1 3.5 V (Note 5)(Note 7)
Dynamic Input Voltage
V
ILD
Maximum LOW Level
5.0 1.9 1.5 V (Note 5)(Note 7)
Dynamic Input Voltage
Symbol Parameter
V
CC
TA = +25°CTA = −40°C to +85°C
Units Conditions
(V) Typ Guaranteed Limits
V
IH
Minimum HIGH Level 4.5 1.5 2.0 2.0
V
V
OUT
= 0.1V
Input Voltage 5.5 1.5 2.0 2.0 or V
CC
− 0.1V
V
IL
Maximum LOW Level 4.5 1.5 0.8 0.8
V
V
OUT
= 0.1V
Input Voltage 5.5 1.5 0.8 0.8 or V
CC
− 0.1V
V
OH
Minimum HIGH Level 4.5 4.49 4.4 4.4
VI
OUT
= −50 µA
Output Voltage 5.5 5.49 5.4 5.4
VIN = VIL or V
IH
4.5 3.86 3.76
V
IOH = −24 mA
5.5 4.86 4.76 IOH = −24 mA (Note 8)
V
OL
Maximum LOW Level 4.5 0.001 0.1 0.1
VI
OUT
= 50 µA
Output Voltage 5.5 0.001 0.1 0.1
VIN = VIL or V
IH
4.5 0.36 0.44
V
IOL = 24 mA
5.5 0.36 0.44 I
OL
= 24 mA (Note 8)
I
IN
Maximum Input Leakage Current 5.5 ±0.1 ±1.0 µAVI = VCC, GND
I
OZT
Maximum 3-STATE
5.5 ±0.3 ±3.0 µA
VI = VIL, V
IH
Leakage Current VO = VCC, GND
I
CCT
Maximum ICC/Input 5.5 0.6 1.5 mA VI = VCC − 2.1V
I
OLD
Minimum Dynamic 5.5 75 mA V
OLD
= 1.65V Max
I
OHD
Output Current (Note 9) 5.5 −75 mA V
OHD
= 3.85V Min
I
CC
Maximum Quiescent Supply Current 5.5 4.0 40.0 µAVIN = VCC or GND
V
OLP
Quiet Output
5.0 1.1 1.5 V
Figure 1, Figure 2
Maximum Dynamic V
OL
(Note 10)(Note 11)
V
OLV
Quiet Output
5.0 −0.6 −1.2 V
Figure 1, Figure 2
Minimum Dynamic V
OL
(Note 10)(Note 11)
V
IHD
Minimum HIGH Level Dynamic Input Voltage 5.0 1.9 2.2 V (Note 10)(Note 12)
V
ILD
Maximum LOW Level Dynamic Input Voltage 5.0 1.2 0.8 V (Note 10)(Note 12)
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