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Part: 74LCX27
Category:
Logic
Description: Low Voltage Triple 3-Input NOR GATE With 5V Tolerant Inputs
Company: Fairchild Semiconductor
Datasheet: Download 74LCX27 datasheet File size : 201 kB
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74LCX27 Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
February 2001 Revised February 2001
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 2.3V3.6V VCC specifications provided s 4.9 ns tPD max (VCC = 3.3V), 10 µA ICC max s Power down high impedance inputs and outputs s ±24 mA output drive (VCC = 3.0V) 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 Package Number M14A M14D MTC14 Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 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
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
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 Inputs An H X X L
H = HIGH Voltage Level
Output Cn X X H L On L L L H
X = Immaterial
Bn X H X L
L = LOW Voltage Level
© 2001 Fairchild Semiconductor Corporation
DS500454
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74LCX27
Absolute Maximum Ratings(Note 1)
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 2) VI 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 ±50 ±100 ±100 -65 to +150
°C
Recommended Operating Conditions (Note 3)
Symbol VCC VI VO IOH/IOL Supply Voltage Input Voltage Output Voltage Output Current HIGH or LOW State VCC = 3.0V - 3.6V VCC = 2.7V - 3.0V VCC = 2.3V - 2.7V TA Free-Air Operating Temperature Input Edge Rate, VIN = 0.8V2.0V, VCC = 3.0V Parameter Operating Data Retention Min 2.0 1.5 0 0 Max 3.6 3.6 5.5 VCC Units V V V mA
±2 4 ±1 2 ±8 -40
0 85 10
°C
ns/V
t/V
Note 1: 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 "Recomm ended Operating Conditions" table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Note 3: 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 = -100 µA IOH = -8 mA IOH = -12 mA IOH = -18 mA IOH = -24 mA VOL LOW Level Output Voltage IOL = 100 µA IOL = 8mA IOL = 12 mA IOL = 16 mA IOL = 24 mA II IOFF ICC ICC Input Leakage Current Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input 0 VI 5.5V VI or VO = 5.5V VI = VCC or GND 3.6V VI 5.5V VIH = VCC -0.6V Conditions VCC (V) 2.3 - 2.7 2.7 - 3.6 2.3 - 2.7 2.7 - 3.6 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 VCC - 0.2 1.8 2.2 2.4 2.2 0 .2 0.6 0 .4 0 .4 0.55 ±5.0 10 10 ±10 500 µA µA µA µA V V TA = -40°C to +85°C Min 1 .7 2 .0 0 .7 0 .8 Max V V Units
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74LCX27
AC Electrical Characteristics
TA = -40°C to +85°CF, RL = 500 Symbol Parameter VCC = 3.3V ± 0.3V CL = 50pF Min tPHL tPLH tOSHL tOSLH Output to Output Skew (Note 4) Propagation Delay 1.5 1.5 M ax 4.9 4 .9 1.0 1.0 VCC = 2.7V CL = 50pF Min 1.5 1.5 Max 5.8 5.8 VCC = 2.5V ± 0.2V CL = 30pF Min 1.5 1.5 Max 5.9 5.9 ns ns Units
Note 4: 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 VOL Conditions CL = 50 pF, VIH = 3.3V, VIL = 0V CL = 30 pF, VIH = 2.5V, VIL = 0V CL = 50 pF, VIH = 3.3V, VIL = 0V CL = 30 pF, VIH = 2.5V, VIL = 0V VCC (V) 3.3 2.5 3.3 2.5 TA = 25°C Typical 0.8 0.6 -0.8 -0.6 Unit V V
Capacitance
Symbol CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance Parameter 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
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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 ± 0.3V VCC x 2 at VCC = 2.5 ± 0.2V G ND
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 Vm i Vm o Vx Vy VC C 3.3V ± 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 ± 0.2V VCC/2 VCC/2 VOL + 0.15V VOH - 0.15V
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74LCX27
Schematic Diagram Generic for LCX Family
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