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74LV251D-74LV251PW
8-input multiplexer 3-State
Product specification
Supersedes data of 1997 Apr 10
IC24 Data Handbook
1998 May 20
Philips Semiconductors Product specification
74LV2518-input multiplexer (3-State)
FEATURES Optimized for low voltage applications: 1.0 to 3.6 V Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V,
Tamb = 25°C Typical VOHV (output VOH undershoot) > 2 V at VCC = 3.3 V,
Tamb = 25°C True and complement outputs Both outputs are 3-State for further multiplexer expansion Multifunction capability Permits multiplexing from n-lines to one line Output capability: standard ICC category: MSI
DESCRIPTIONThe 74LV251 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT251.
The 74LV251 is an 8-input multiplexer with 8 binary inputs (I0 to I7), an
output enable input (OE) and three select inputs (S0, S1, S2). One of
the eight binary inputs is selected by the select inputs and is routed to
the outputs (Y , Y). Both outputs are in the high impedance OFF-state
(Z) when the output enable input is HIGH, allowing multiplexer
expansion by tying the outputs.
QUICK REFERENCE DATAGND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5 ns
NOTE: CPD is used to determine the dynamic power dissipation (PD in μW)
PD = CPD × VCC2 × fi (CL × VCC2 × fo) where:
fi = input frequency in MHz; CL = output load capacitance in pF;
fo = output frequency in MHz; VCC = supply voltage in V;
(CL × VCC 2 × fo) = sum of the outputs.
ORDERING INFORMATION
Philips Semiconductors Product specification
74LV2518-input multiplexer (3-State)
PIN CONFIGURATION
PIN DESCRIPTION
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
FUNCTIONAL DIAGRAM
Philips Semiconductors Product specification
74LV2518-input multiplexer (3-State)
FUNCTION TABLE
NOTES:= HIGH voltage level= LOW voltage level= don’t care= high impedance OFF-state
RECOMMENDED OPERATING CONDITIONS
NOTE: The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V.
Philips Semiconductors Product specification
74LV2518-input multiplexer (3-State)
ABSOLUTE MAXIMUM RATINGS1, 2In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0 V).
NOTES: Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
DC ELECTRICAL CHARACTERISTICSOver recommended operating conditions. Voltages are referenced to GND (ground = 0 V).
Philips Semiconductors Product specification
74LV2518-input multiplexer (3-State)
DC ELECTRICAL CHARACTERISTICS (Continued)
NOTE: All typical values are measured at Tamb = 25°C.
AC CHARACTERISTICSGND = 0V; tr = tf = 2.5ns; CL = 50pF; RL = 1KΩ
NOTES: Unless otherwise stated, all typical values are measured at Tamb = 25°C Typical values are measured at VCC = 3.3 V.
