MC74HC251A: 8-Input Multiplexer (3-state)
The MC54/74HC251 is identical in pinout to the LS251. The deviceinputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.This device selects one of the eight binary Data Inputs, as determined by the Address Inputs. The Output Enable pin must be a low level for the selected data to appear at the outputs. If Output Enable is high, both the Y and the Y outputs are in the high impedance state. This 3 state feature allows the HC251 to be used in bus oriented systems. The HC251 is similar in function to the HC251 which does not have 3 state outputs.
Features- Output Drive Capability: 10 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2 to 6 V
- Low Input Current: 1 A
- High Noise Immunity Characteristic of CMOS Devices
- These are PbFree Devices
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Data Sheets (1)
Package Drawings (2)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| MC74HC251ADG | Active | Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tube | 48 | $0.1457 |
| MC74HC251ADR2G | Active | Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.1457 |
| MC74HC251ADTG | Active | Pb-free
Halide free | TSSOP-16 | 948F-01 | 1 | Tube | 96 | $0.1457 |
| MC74HC251ADTR2G | Active | Pb-free
Halide free | TSSOP-16 | 948F-01 | 1 | Tape and Reel | 2500 | $0.1457 |
| NLV74HC251ADR2G | Active | AEC Qualified
PPAP Capable
Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.3267 |
Specifications
| Product | Channels | VCC Min (V) | VCC Max (V) | tpd Max (ns) | IO Max (mA) |
|---|
| MC74HC251ADG | 1 | 2 | 6 | 48 | 5.2 |
| MC74HC251ADR2G | 1 | 2 | 6 | 48 | 5.2 |
| MC74HC251ADTG | 1 | 2 | 6 | 48 | 5.2 |
| MC74HC251ADTR2G | 1 | 2 | 6 | 48 | 5.2 |
| NLV74HC251ADR2G | 1 | 2 | 6 | 48 | 5.2 |
