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Details, datasheet, quote on part number:74LCX257MTR
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| Part: | 74LCX257MTR |
| Category: | Logic => LCX->Low Voltage HCMOS, 5V I/O Tolerant |
| Description: | Low Voltage Quad 2 Channel Multiplexer With 5V Tolerant Inputs And Outputs (3-STATE) |
| Company: | ST Microelectronics, Inc. |
| Datasheet: | Download 74LCX257MTR datasheet File size : 261 kB |
| Request For quote: | Find where to buy 74LCX257MTR
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Datasheet text preview:
74LCX257
LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS AND OUTPUTS (3-STATE)
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5V TOLERANT INPUTS AND OUTPUTS H IGH SPEED : tPD = 6.0 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) at VCC = 3V PCI BUS LEVELS GUARANTEED AT 24 mA BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 2.0V to 3.6V (1.5V Data Retention) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257 LATCH-UP PERFORMANCE EXCEEDS 500mA (JESD 17) ESD PERFORMANCE: HBM > 2000V (MIL STD 883 method 3015); MM > 200V
SOP
TSSOP
ORDER CODES
PACKAGE SOP TSSOP TUBE 74LCX257M T&R 74LCX257MTR 74LCX257TTR
DESCRIPTION The 74LCX257 is a low voltage CMOS QUAD 2 CH ANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for both inputs and outputs. PIN CONNECTION AND IEC LOGIC SYMBOLS
It is composed of four independent 2 channel multiplexers with common SELECT and ENABLE (OE) INPUT. The 74LCX257 is a non-inverting multiplexer. When the ENABLE INPUT is held "High", all outputs become in high impedance state. If SELECT INPUT is held "Low", "A" data is selected, when SELECT INPUT is "High", "B" data is chosen. It has same speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
June 2002
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74LCX257
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No 1 2, 5, 11, 14 3, 6, 10, 13 4, 7, 9, 12 15 8 16 SYMBOL SELECT 1A to 4A 1B to 4B 1Y to 4Y OE GND VCC NAME AND FUNCTION Common Data Select Inputs Data Inputs From Source A Data Inputs From Source B 3 State Multiplexer Outputs 3 State Output Enable Inputs (Active LOW) Ground (0V) Positive Supply Voltage
TRUTH TABLE
INPUTS OE H L L L L
X : Don't Care Z : High Impedance
OUTPUT A X L H X X B X X X L H Y Z L H L H
SELECT X L L H H
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74LCX257
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
AB SOLUTE MAXIMUM RATINGS
Symbol V CC VI VO VO IIK IOK IO ICC IGND Tstg TL Supply Voltage DC Input Voltage DC Output Voltage (OFF State) DC Output Voltage (High or Low State) (note 1) DC Input Diode Current DC Output Diode Current (note 2) DC Output Current DC Supply Current per Supply Pin DC Ground Current per Supply Pin Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7.0 -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC + 0.5 - 50 - 50 ± 50 ± 100 ± 100 -65 to +150 300 Unit V V V V mA mA mA mA mA °C °C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 1) IO absolute maximum rating must be observed 2) VO < GND
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74LCX257
RECOMMENDED OPERATING CONDITIONS
Symbol V CC VI VO VO IOH, IOL IOH, IOL Top dt/dv Supply Voltage (note 1) Input Voltage Output Voltage (OFF State) Output Voltage (High or Low State) High or Low Level Output Current (VCC = 3.0 to 3.6V) High or Low Level Output Current (VCC = 2.7V) Operating Temperature Input Rise and Fall Time (note 2) Parameter Value 2.0 to 3.6 0 to 5.5 0 to 5.5 0 to VCC ± 24 ± 12 -55 to 125 0 to 10 Unit V V V V mA mA °C ns/V
1) Truth Table guaranteed: 1.5V to 3.6V 2) VIN from 0.8V to 2V at VCC = 3.0V
DC SPECIFICATIONS
Test Condition Symbol Parameter VCC (V) -40 to 85 °C Min. 2.0 2.7 to 3.6 0.8 2.7 to 3.6 2.7 3.0 VOL Low Level Output Voltage 2.7 to 3.6 2.7 3.0 II Ioff I OZ Input Leakage Current Power Off Leakage Current High Impedance Output Leakage Current Quiescent Supply Current ICC incr. per Input 2.7 to 3.6 0 2.7 to 3.6 IO=-100 µA IO=-12 mA IO=-18 mA IO=-24 mA IO=100 µA IO=12 mA IO=16 mA IO=24 mA VI = 0 to 5.5V VI or VO = 5.5V VI = VIH or VIL VO = 0 to VCC VI = VCC or GND VI or VO= 3.6 to 5.5V VIH = VCC - 0.6V VCC-0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 ±5 10 VCC-0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 ±5 10 µA µA V V 0.8 V Max. Value -55 to 125 °C Min. 2.0 Max. V Unit
VIH VIL VO H
High Level Input Voltage Low Level Input Voltage High Level Output Voltage
±5
10 ± 10 500
±5
10 ± 10 500
µA
µA µA
ICC
ICC
2.7 to 3.6 2.7 to 3.6
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74LCX257
DYNAMIC SWITCHING CHARACTERISTICS
Test Condition Symbol Parameter VC C (V) 3.3 CL = 50pF VIL = 0V, VIH = 3.3V Value TA = 25 °C Min. Typ. 0.8 -0.8 Max. V Unit
VOLP VOLV
Dynamic Low Level Quiet Output (note 1)
1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state.
AC ELECTRICAL CHARACTERISTICS
Test Condition Symbol Parameter VCC (V) 2.7 3.0 to 3.6 2.7 3.0 to 3.6 2.7 3.0 to 3.6 2.7 3.0 to 3.6 3.0 to 3.6 CL (pF) 50 50 50 50 50 RL () 500 500 500 500 500 ts = tr (ns) 2.5 2.5 2.5 2.5 2.5 -40 to 85 °C Min. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Max. 6.5 6.0 8.5 7.0 8.5 7.0 6.0 5.5 1.0 Value -55 to 125 °C Min. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Max. 6.5 6.0 8.5 7.0 8.5 7.0 6.0 5.5 1.0 ns ns ns ns ns Unit
tPLH tPHL tPLH tPHL tPZL tPZH tPLZ tPHZ tOSLH tOSHL
Propagation Delay Time (A, B to Y) Propagation Delay Time (SELECT to Y) Output EnableTime Output DisableTime Output To Output Skew Time (note1, 2)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - t PLHn|, tOSHL = | tPHLm - tPHLn|) 2) Parameter guaranteed by design
CA PACITIVE CHARACTERISTICS
Test Condition Symbol Parameter VC C (V) 3.3 3.3 3.3 VIN = 0 to VCC VIN = 0 to VCC fIN = 10MHz VIN = 0 or VCC Value TA = 25 °C Min. Typ. 7 8 25 Max. pF pF pF Unit
CIN CO U T CPD
Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1)
1) CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/4 (per channel)
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