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74LCX27 Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
February 2001 Revised February 2005
74LCX27 Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
General Description
The LCX27 contains three 3-input NOR gates. The inputs tolerate voltages up to 7V allowing the interface of 5V systems to 3V systems. The 74LCX27 is fabricated with advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation.
Features
s 5V tolerant inputs s 2.3V-3.6V VCC specifications provided s 4.9 ns tPD max (VCC
3.3V), 10 PA ICC max 3.0V)
s Power down high impedance inputs and outputs s r24 mA output drive (VCC s Implements patented noise/EMI reduction circuitry s Latch-up performance exceeds 500 mA s ESD performance:
Human body model ! 2000V Machine model ! 200V
Ordering Code:
Order Number 74LCX27M 74LCX27SJ 74LCX27MTC 74LCX27MTCX_NL (Note 1) Package Number M14A M14D MTC14 MTC14 Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow Pb-Free 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Pb-Free 14-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. Note 1: "_NL" indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
(c) 2005 Fairchild Semiconductor Corporation
DS500454
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74LCX27
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names A n , B n , Cn On Description Inputs Outputs
Truth Table
On An Bn Cn Output Cn X X H L
LOW Voltage Level X
Inputs An H X X L
H HIGH Voltage Level
Bn X H X L
L
On L L L H
Immaterial
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2
74LCX27
Absolute Maximum Ratings(Note 2)
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 Value Conditions Units V V Output in HIGH or LOW State (Note 3) VI GND VO GND VO ! VCC V mA mA mA mA mA
0.5 to 7.0 0.5 to 7.0 0.5 to VCC 0.5 50 50 50 r50 r100 r100 65 to 150
qC
Recommended Operating Conditions (Note 4)
Symbol VCC VI VO IOH/IOL Supply Voltage Input Voltage Output Voltage Output Current HIGH or LOW State VCC VCC VCC TA Free-Air Operating Temperature Input Edge Rate, VIN 0.8V-2.0V, VCC 3.0V 3.0V 3.6V 2.7V - 3.0V 2.3V - 2.7V Parameter Operating Data Retention Min 2.0 1.5 0 0 Max 3.6 3.6 5.5 VCC Units V V V mA
r24 r12 r8 40
0 85 10
qC
ns/V
't/'V
Note 2: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Note 3: IO Absolute Maximum Rating must be observed. Note 4: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol VIH VIL VOH Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage IOH IOH IOH IOH IOH VOL LOW Level Output Voltage IOL IOL IOL IOL IOL II IOFF ICC Input Leakage Current Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input Conditions VCC (V) 2.3 2.7 2.7 3.6 2.3 2.7 2.7 3.6 TA Min 1.7 2.0 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 V V
40qC to 85qC
Max
Units
V V
100 PA 8 mA 12 mA 18 mA 24 mA
100 PA 8mA 12 mA 16 mA 24 mA 5.5V
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 0 2.3 3.6 2.3 3.6 2.3 3.6
0 d VI d 5.5V VI or VO VI VIH VCC or GND VCC 0.6V
r5.0
10 10
PA PA PA PA
3.6V d VI d 5.5V
r10
500
'ICC
3
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74LCX27
AC Electrical Characteristics
TA Symbol Parameter VCC 3.3V r 0.3V 50pF Max 4.9 4.9 1.0 1.0
40qC to 85qCF, RL
VCC CL Min 1.5 1.5 2.7V 50pF Max 5.8 5.8
500: VCC 2.5V r 0.2V 30pF Max 5.9 5.9 ns ns Units
CL Min tPHL tPLH tOSHL tOSLH Output to Output Skew (Note 5) Propagation Delay 1.5 1.5
CL Min 1.5 1.5
Note 5: 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).
Dynamic Switching Characteristics
Symbol VOLP VOLV Parameter Quiet Output Dynamic Peak VOL Quiet Output Dynamic Valley V OL CL CL CL CL 50 pF, VIH 30 pF, VIH 50 pF, VIH 30 pF, VIH Conditions 3.3V, VIL 2.5V, VIL 3.3V, VIL 2.5V, VIL 0V 0V 0V 0V VCC (V) 3.3 2.5 3.3 2.5 TA 25qC Typical 0.8 0.6 Unit V V
0.8 0.6
Capacitance
Symbol CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance Parameter VCC VCC VCC Open, VI 3.3V, VI 3.3V, VI Conditions 0V or VCC 0V or VCC 0V or VCC, f 10 MHz Typical 7 8 25 Units pF pF pF
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74LCX27
AC LOADING and WAVEFORMS Generic for LCX Family
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 r 0.3V VCC x 2 at VCC 2.5 r 0.2V GND
Waveform for Inverting and Non-Inverting Functions
3-STATE Output High Enable and Disable Times for Logic
Propagation Delay. Pulse Width and trec Waveforms
Setup Time, Hold Time and Recovery Time for Logic
3-STATE Output Low Enable and Disable Times for Logic FIGURE 2. Waveforms (Input Characteristics; f =1MHz, tr = tf = 3ns) Symbol Vmi Vmo Vx Vy VCC 3.3V r 0.3V 1.5V 1.5V VOL 0.3V VOH 0.3V 2.7V 1.5V 1.5V VOL 0.3V VOH 0.3V
trise and tfall
2.5V r 0.2V VCC/2 VCC/2 VOL 0.15V VOH 0.15V
5
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74LCX27
Schematic Diagram Generic for LCX Family
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74LCX27
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow Package Number M14A
7
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74LCX27
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D
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74LCX27 Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC14
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. 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 THE PRESIDENT 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 to the user. 9 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. www.fairchildsemi.com
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