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74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
May 2007
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Features
5V tolerant input and outputs 2.3V-3.6V VCC specifications provided 6.5ns tPD max (VCC = 3.3V), 10A ICC max Power down high impedance inputs and outputs Supports live
tm
General Description
The LCX540 is an octal buffer/line driver designed to be employed as a memory and address driver, clock driver and bus oriented transmitter/receiver. This device is similar in function to the LCX240 while providing flow-through architecture (inputs on opposite side from outputs). This pinout arrangement makes this device especially useful as an output port for microprocessors, allowing ease of layout and greater PC board density. The LCX540 is designed for low voltage (2.5V or 3.3V) VCC applications with capability of interfacing to a 5V signal environment. The LCX540 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation.
insertion/withdrawal(1)
Implements patented noise/ EMI reduction circuitry Latch-up performance exceeds JEDEC 78 conditions ESD performance
- Human body model > 2000V - Machine model > 200V Leadless Pb-Free DQFN package
Ordering Information
Order Number
74LCX540WM 74LCX540SJ 74LCX540BQX(2) 74LCX540MSA 74LCX540MTC 74LCX540MTC_NL(3)
Package Number
M20B M20D
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MLP020B Pb-Free 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm MSA20 MTC20 MTC20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code. Pb-Free package per JEDEC J-STD-020B. Notes: 1. To ensure the high impedance state during power up or down, OE should be tied to VCC through a pull-up resistor: the minimum value of the resistor is determined by the current-sourcing capability of the driver. 2. DQFN package available in Tape and Reel only. 3. "_NL" indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Connection Diagrams
Pin Assignments for SOIC, SOP, SSOP, TSSOP
OE1 I0 I1 I2 I3 I4 I5 I6 I7 GND
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11
Logic Symbol
IEEE/IEC OE1 OE2 I0 I1 I2 I3 I4 I5 I6 I7 & EN
VCC OE2 O0 O1 O2 O3 O4 O5 O6 O7
O0 O1 O2 O3 O4 O5 O6 O7
Pad Assignment for DQFN
OE1 VCC
1 20 19 OE2 18 O0 17 O1 16 O2 15 O3 14 O4 13 O5 12 O6 10 11
Truth Table
Inputs OE1
L H X L
Outputs I
H X X L
I0 2 I1 3 I2 4 I3 5 I4 6 I5 7 I6 8 I7 9
OE2
L X H L
On
L Z Z H
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
GND O7
(Top View)
Pin Descriptions
Pin Names
OE1, OE2 I0-I7 O0-O7
Description
3-STATE Output Enable Inputs Inputs Outputs
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 2
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and 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 VI VO IIK IOK IO ICC IGND TSTG
Parameter
Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source/Sink Current DC Supply Current per Supply Pin DC Ground Current per Ground Pin Storage Temperature
Conditions
Value
-0.5 to +7.0 -0.5 to +7.0
Units
V V V mA mA mA mA mA C
Output in 3-STATE Output in HIGH or LOW VI < GND VO < GND VO > VCC State(4)
-0.5 to +7.0 -0.5 to VCC + 0.5 -50 -50 +50 50 100 100 -65 to +150
Recommended Operating Conditions(5)
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 VI VO IOH / IOL
Parameter
Supply Voltage Input Voltage Output Voltage Output Current Operating
Conditions
Data Retention HIGH or LOW State 3-STATE VCC = 3.0V - 3.6V VCC = 2.7V - 3.0V VCC = 2.3V - 2.7V
Min.
2.0 1.5 0 0 0
Max.
3.6 3.6 5.5 VCC 5.5 24 12 8
Units
V V V mA
TA t / V
Free-Air Operating Temperature Input Edge Rate VIN = 0.8V - 2.0V, VCC = 3.0V
-40 0
85 10
C ns / V
Notes: 4. IO Absolute Maximum Rating must be observed. 5. Unused inputs or I/O's must be held HIGH or LOW. They may not float.
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 3
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
DC Electrical Characteristics
TA = -40C to +85C Symbol
VIH VIL VOH
Parameter
HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage
Conditions
VCC (V)
2.3 - 2.7 2.7 - 3.6 2.3 - 2.7 2.7 - 3.6
Min.
1.7 2.0
Max.
Units
V
0.7 0.8 VCC - 0.2 1.8 2.2 2.4 2.2 0.2 0.6 0.4 0.4 0.55 5.0 5.0 10 10 10 500
V V
IOH = -100A IOH = -8mA IOH = -12mA IOH = -18mA IOH = -24mA
2.3 - 3.6 2.3 2.7 3.0 3.0 2.3 - 3.6 2.3 2.7 3.0 3.0 2.3 - 3.6 2.3 - 3.6 0 2.3 - 3.6 2.3 - 3.6 2.3 - 3.6
VOL
LOW Level Output Voltage
IOL = 100A IOL = 8mA IOL = 12mA IOL = 16mA IOL = 24mA
V
II IOZ IOFF ICC ICC
Input Leakage Current 3-STATE Output Voltage Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input
0 VI 5.5V 0 VO 5.5V, VI = VIH or VIL VI or VO = 5.5V VI = VCC or GND 3.6V VI, VO 5.5V(6) VIH = VCC - 0.6V
A A A A A
AC Electrical Characteristics
TA = -40C to +85C, RL = 500 VCC = 3.3V 0.3V CL = 50pF Symbol
tPHL, tPLH tPZL, tPZH tPLZ, tPHZ
VCC = 2.7V CL = 50pF Min.
1.5 1.5 1.5
VCC = 2.5V 0.2V CL = 30pF Min.
1.5 1.5 1.5
Parameter
Propagation Delay Output Enable Time Output Disable Time
Min.
1.5 1.5 1.5
Max.
6.5 8.5 7.5 1.0
Max.
7.5 9.5 8.5
Max.
7.8 10.5 9.0
Units
ns ns ns ns
tOSHL, tOSLH Output to Output Skew(7) Notes: 6. Outputs disabled or 3-STATE only.
7. 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).
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 4
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Dynamic Switching Characteristics
Symbol
VOLP VOLV
Parameter
Quiet Output Dynamic Peak VOL
Conditions
CL = 50pF, VIH = 3.3V, VIL = 0V CL = 30pF, VIH = 2.5V, VIL = 0V
VCC (V)
3.3 2.5 3.3 2.5
TA = 25C Typical
0.8 0.6 -0.8 -0.6 V
Units
V
Quiet Output Dynamic Valley VOL CL = 50pF, VIH = 3.3V, VIL = 0V CL = 30pF, VIH = 2.5V, VIL = 0V
Capacitance
Symbol
CIN COUT CPD
Parameter
Input Capacitance Output Capacitance Power Dissipation Capacitance
Conditions
VCC = Open, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC, f = 10 MHz
Typical
7 8 25
Units
pF pF pF
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 5
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
AC Loading and Waveforms (Generic for LCX Family)
VCC TEST SIGNAL 500
DUT
OPEN GND VI
tPLH, tPHL tPZH, tPHZ tPZL, tPLZ
CL
500
Figure 1. AC Test Circuit (CL includes probe and jig capacitance) Test
tPLH, tPHL tPZL, tPLZ tPZH, tPHZ
Switch
Open 6V at VCC = 3.3 0.3V VCC x 2 at VCC = 2.5 0.2V GND
DATA IN tpxx DATA OUT
Vmi tpxx Vmo
VCC GND
OUTPUT CONTROL tPZH DATA OUT Vmo tPHZ
Vmi
VCC GND VOH VY
Waveform for Inverting and Non-Inverting Functions
tW CONTROL IN Vmi trec CLOCK tPHL OUTPUT Vmo Vmi tPLH Vmo VCC GND
3-STATE Output High Enable and Disable Times for Logic
DATA IN tS CONTROL INPUT tS MR OR CLEAR trec Vmi tH Vmi Vmi VCC GND VCC GND
Propagation Delay, Pulse Width and trec Waveforms
OUTPUT CONTROL tPZL DATA OUT Vmo tPLZ Vmi VCC GND VX VOL
Setup Time, Hold Time and Recovery Time for Logic
tr tf VOH VOL
ANY OUTPUT
90% 10%
90% 10%
3-STATE Output Low Enable and Disable Times for Logic
trise and tfall
Figure 2. Waveforms (Input Characteristics; f = 1MHz, tr = tf = 3ns) Symbol
Vmi Vmo Vx Vy
3.3V 0.3V
1.5V 1.5V VOL + 0.3V VOH - 0.3V
VCC 2.7V
1.5V 1.5V VOL + 0.3V VOH - 0.3V
2.5V 0.2V
VCC / 2 VCC / 2 VOL + 0.15V VOH - 0.15V
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 6
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Schematic Diagram (Generic for LCX Family)
Input Stage
P2 P1 VCC
Data ESD D2 N+/P- N1 N2 GTOTM Input Stage P4 D6 N+/P- P5 X1 VDD
Output
P3 N5 Enable ESD D4 N+/P- N3
N4
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 7
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Tape and Reel Specification
Tape Format for DQFN Package Designator
BQX
Tape Section
Leader (Start End) Carrier Trailer (Hub End)
Number Cavities
125 (typ) 3000 75 (typ)
Cavity Status
Empty Filled Empty
Cover Tape Status
Sealed Sealed Sealed
Tape Dimensions inches (millimeters)
Reel Dimensions inches (millimeters)
Tape Size
12mm
A
13.0 (330.0)
B
0.059 (1.50)
C
0.512 (13.00)
D
0.795 (20.20)
N
2.165 (55.00)
W1
0.488 (12.4)
W2
0.724 (18.4)
www.fairchildsemi.com
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
8
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions inches (millimeters) unless otherwise noted
Figure 3. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 9
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued) millimeters unless otherwise noted
Figure 4. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 10
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued) millimeters unless otherwise noted
Figure 5. Pb-Free 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm Package Number MLP020B
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 11
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued) millimeters unless otherwise noted
Figure 6. 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 12
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued) millimeters unless otherwise noted
Figure 7. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 13
74LCX540 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
TRADEMARKS
The following are registered and unregistered trademarks and service marks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks ACEx(R) Build it NowTM CorePLUSTM CROSSVOLTTM CTLTM Current Transfer LogicTM EcoSPARK(R) FACT Quiet SeriesTM FACT(R) FAST(R) FastvCoreTM FPSTM FRFET(R) Global Power ResourceSM Green FPSTM Green FPSTM e-SeriesTM GTOTM i-LoTM IntelliMAXTM ISOPLANARTM MegaBuckTM MICROCOUPLERTM MicroPakTM Motion-SPMTM OPTOLOGIC(R) OPTOPLANAR(R) PDP-SPMTM Power220(R) Power247(R) POWEREDGE(R) Power-SPMTM PowerTrench(R) Programmable Active DroopTM QFET(R) QSTM QT OptoelectronicsTM Quiet SeriesTM RapidConfigureTM SMART STARTTM SPM(R) STEALTHTM SuperFETTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 SyncFETTM The Power Franchise(R) TM TinyBoostTM TinyBuckTM TinyLogic(R) TINYOPTOTM TinyPowerTM TinyPWMTM TinyWireTM SerDesTM UHC(R) UniFETTM VCXTM
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 significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design 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. I28
2.
A critical component is 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.
Preliminary
First Production
No Identification Needed
Full Production
Obsolete
Not In Production
(c)1995 Fairchild Semiconductor Corporation 74LCX540 Rev. 1.1
www.fairchildsemi.com 14

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