N74F253D ,Dual 4-bit input multiplexer (3-State)PIN CONFIGURATION• 3-State outputs for bus interface and multiplex expansionOEa 1 16 VCC• Common se ..
N74F257AD ,Quad 2-line to 1-line selector/multiplexer, non-inverting 3-StateINTEGRATED CIRCUITS74F257AQuad 2-line to 1-line selector/multiplexer,non-inverting (3-State)Product ..
N74F257AD ,Quad 2-line to 1-line selector/multiplexer, non-inverting 3-StatePIN CONFIGURATION• Industrial range available (–40°C to +85°C)S 1 16VCC• Multifunction capabilityI0 ..
N74F258AD ,Quad 2-line to 1-line selector/multiplexer, inverting 3-StatePIN CONFIGURATION• Multifunction capabilityS 1 16VCC• Non-inverting data pathI 2 15 OE0a• 3-State o ..
N74F258AD ,Quad 2-line to 1-line selector/multiplexer, inverting 3-StateINTEGRATED CIRCUITS74F258AQuad 2-line to 1-line selector/multiplexer,inverting (3-State)Product spe ..
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N74F253D
Dual 4-bit input multiplexer (3-State)
Product specification
IC15 Data Handbook
1988 Nov 29
Philips Semiconductors Product specification
74F253Dual 4-input multiplexer (3-State)
FEATURES 3-State outputs for bus interface and multiplex expansion Common select inputs Separate Output Enable Inputs
DESCRIPTIONThe 74F253 has two identical 4-input multiplexers with 3-State
outputs which select two bits from four sources selected by common
Select inputs (S0, S1). When the individual Output Enable (OEa,
OEb) inputs of the 4-input multiplexers are High, the outputs are
forced to a high impedance (Hi-Z) state.
The 74F253 is the logic implementation of a 2-pole, 4-position
switch; the position of the switch being determined by the logic
levels supplied to the two common Select inputs.
To avoid exceeding the maximum current ratings when the outputs
of the 3-State devices are tied together, all but one device must be
in the high-impedance state. Therefore, only one Output Enable
must be active at a time.
PIN CONFIGURATION
ORDERING INFORMATION
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
NOTE:One (1.0) FAST unit load is defined as: 20μA in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
Philips Semiconductors Product specification
74F253Dual 4-input multiplexer (3-State)
LOGIC DIAGRAM
FUNCTION TABLE
NOTES:= High voltage level= Low voltage level= Don’t care= High impedance “off” state
Philips Semiconductors Product specification
74F253Dual 4-input multiplexer (3-State)
ABSOLUTE MAXIMUM RATINGS(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
RECOMMENDED OPERATING CONDITIONS
Philips Semiconductors Product specification
74F253Dual 4-input multiplexer (3-State)
DC ELECTRICAL CHARACTERISTICS(Over recommended operating free-air temperature range unless otherwise noted.)
NOTES: For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. All typical values are at VCC = 5V, Tamb = 25°C. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
Philips Semiconductors Product specification
74F253Dual 4-input multiplexer (3-State)
AC ELECTRICAL CHARACTERISTICS
AC WAVEFORMSFor all waveforms, VM = 1.5V
Waveform 1. Propagation Deley, Data and Select to Output
Waveform 2. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
Waveform 3. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
