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Details, datasheet, quote on part number:74LCX157M
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| Part: | 74LCX157M |
| Category: | Logic => LCX->Low Voltage HCMOS, 5V I/O Tolerant |
| Description: | Low Voltage CMOS Quad 2 Channel Multiplexer With 5V Tolerant Inputs |
| Company: | ST Microelectronics, Inc. |
| Datasheet: | Download 74LCX157M datasheet File size : 258 kB |
| Request For quote: | Find where to buy 74LCX157M
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Datasheet text preview:
74LCX157
LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS
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5V TOLERANT INPUTS H IGH SPEED : tPD = 6.0ns (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 157 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 74LCX157M T&R 74LCX157MTR 74LCX157TTR
DESCRIPTION The 74LCX157 is a low voltage CMOS QUAD 2 CH ANNEL MULTIPLEXER 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 inputs.
It consists of four 2-input digital multiplexer with common select and strobe inputs. It is a non-inverting multiplexer. When the STROBE input is held high selection of data is inhibited and all the outputs become low. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. 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.
PIN CONNECTION AND IEC LOGIC SYMBOLS
September 2001
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74LCX157
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 STROBE GND VCC NAME AND FUNCTION Common Data Select Inputs Data Inputs From Source A Data Inputs From Source B Multiplexer Outputs Strobe Input Ground (0V) Positive Supply Voltage
TRUTH TABLE
INPUTS STROBE H L L L L
X : Don't Care
OUTPUT A X L H X X B X X X L H Y L L H L H
SELECT X L L H H
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74LCX157
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 (VCC = 0V) 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
RECOMMENDED OPERATING CONDITIONS
Symbol V CC VI VO VO IOH, IOL IOH, IOL Top dt/dv Supply Voltage (note 1) Input Voltage Output Voltage (VCC = 0V) 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
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74LCX157
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 IC C ICC Input Leakage Current Power Off Leakage Current Quiescent Supply Current ICC incr. per Input 2.7 to 3.6 0 2.7 to 3.6 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 = 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 10 ± 10 500 VCC-0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 ±5 10 10 ± 10 500 µA µA 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
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.
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74LCX157
AC ELECTRICAL CHARACTERISTICS
Test Condition Symbol Parameter VC C (V) 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 RL () 500 500 500 500 ts = t r (ns) 2.5 2.5 2.5 2.5 -40 to 85 °C Min. 1.5 1.5 1.5 Max. 6.5 6.0 8.0 7.0 8.0 7.0 1.0 Value -55 to 125 °C Min. Max. 7.5 6.9 9.2 8.0 9.2 8.0 1.0 ns ns ns ns Unit
tPLH tPHL tPLH tPHL tPLH tPHL tOSLH tOSHL
Propagation Delay Time A, B to Y Propagation Delay Time SELECT to Y Propagation Delay Time STROBE to Y 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 VIN = 0 to VCC fIN = 10MHz VIN = 0 or VCC Value TA = 25 °C Min. Typ. 6 25 Max. pF pF Unit
CIN CPD
Input 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)
TEST CIRCUIT
CL = 50 pF or equivalent (includes jig and probe capacitance) RL = 500 or equivalent RT = ZOUT of pulse generator (typically 50)
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