Fairchild Semiconductor 74AC540SJ, 74AC540SCX, 74AC540SC, 74AC540PC, 74AC540MTCX Datasheet
...
© 1999 Fairchild Semiconductor Corporation Ds009966 www.fairchildsemi.com
November 1988
Revised November 1999
74AC540 Octal Buffer/Line Driver with 3-STATE Outputs
74AC540
Octal Buffer/Line Driv e r wit h 3- S TATE Outputs
General Description
The AC540 is an octal buffer/line driv ers designed to be
employed as memory a nd address drivers, clock drivers
and bus oriented transmitter/receivers.
These devices are simila r in function to the AC240 while
providing flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes these
devices especially useful as outpu t ports for microprocessors, allowing ease of layout and greater PC board density.
Features
■ ICC and IOZ reduced by 5 0%
■ 3-STATE inverting outputs
■ Inputs and outputs opposite si de of package, allowing
easier interface to microprocessors
■ Output source/sink 24 mA
Ordering Code:
Device also available in Tape and Reel. Specify by appending s uffix let te r “X” to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
Truth Table
H = HIGH Voltage Level X = Immaterial
L = LOW Voltage Level Z = High Impedance
FACT is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74AC540SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74AC540SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC540MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC540PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Inputs
Outputs
OE
1
OE
2
I
LLH L
HXX Z
XHX Z
LLL H
www.fairchildsemi.com 2
74AC540
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power
supply, temperature, and ou tput/inp ut loadi ng varia bles. Fairchild does no t
recommend operat ion of FACT circuits outside da t abook specifications.
DC Electrical Characteristics
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 loade d 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.
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
Junction Temperature (T
J
)
PDIP 140°C
Supply Voltage (V
CC
) 2.0V to 6.0V
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) 125 mV/ns
V
IN
from 30% to 70% of V
CC
VCC @ 3.3V, 4.5V, 5.5V
Symbol Parameter
V
CC
TA = +25°CTA = −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
5.5 5.49 5.4 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 IOH = −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)
IIN Maximum Input
5.5 ±0.1 ±1.0 µAVI = VCC, GND
(Note 4) Leakage Current
I
OZ
Maximum 3-STATE VI (OE) = VIL, V
IH
Current 5.5 ±0.25 ±2.5 µAVI = VCC, GND
VO = VCC, GND
I
OLD
Minimum Dynamic 5.5 75 mA V
OLD
= 1.65V Max
I
OHD
Output Current (Note 3) 5.5 −75 mA V
OHD
= 3.85V Min
ICC Maximum Quiescent
5.5 4.0 40.0 µA
VIN = V
CC
(Note 4) Supply Current or GND
3 www.fairchildsemi.com
74AC540
AC Electrical Characteristics
Note 5: Voltage Range 3.3 is 3.3V ± 0.3V
Voltage Range 5.0 is 5.0V ± 0.5V
Capacitance
V
CC
TA = +25°CT
A
= −40°C to +85°C
Symbol Parameter (V)
C
L
= 50 pF CL = 50 pF
Units
(Note 5) Min Typ Max Min Max
t
PLH
Propagation Delay 3.3 1.5 5.5 7.5 1.0 8.0
ns
Data to Output 5.0 1.5 4.0 6.0 1.0 6.5
t
PHL
Propagation Delay 3.3 1.5 5.0 7.0 1.0 7.5
ns
Data to Output 5.0 1.5 4.0 5.5 1.0 6.0
t
PZH
Output Enable Time 3.3 3.0 8.5 11.0 2.5 12.0
ns
5.0 2.0 6.5 8.5 2.0 9.5
t
PZL
Output Enable Time 3.3 2.5 7.5 10.0 2.0 11.0
ns
5.0 2.0 6.0 7.5 1.5 8.5
t
PHZ
Output Disable Time 3.3 2.5 8.5 13.0 1.5 14.0
ns
5.0 1.5 7.5 10.5 1.0 11.0
t
PLZ
Output Disable Time 3.3 2.5 7.0 10.0 2.0 11.0
ns
5.0 1.5 6.0 8.0 1.5 9.0
Symbol Parameter Typ Units Conditions
C
IN
Input Capacitance 4.5 pF VCC = OPEN
C
PD
Power Dissipation Capacitance 30.0 pF VCC = 5.0V
Loading...