These data selectors/multiplexers are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable () input is at a high logic level.
The SN54ALS257A and SN54ALS258A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS257A, SN74ALS258A, SN74AS257, and SN74AS258 are characterized for operation from 0°C to 70°C.
Part number | Order | Function | Technology Family | VCC (Min) (V) | VCC (Max) (V) | Channels (#) | Voltage (Nom) (V) | F @ nom voltage (Max) (MHz) | ICC @ nom voltage (Max) (mA) | tpd @ nom Voltage (Max) (ns) | Configuration | Type | IOL (Max) (mA) | IOH (Max) (mA) | Rating | Operating temperature range (C) | Package Group | Package size: mm2:W x L (PKG) | Bits (#) | Digital input leakage (Max) (uA) | ESD CDM (kV) | ESD HBM (kV) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SN74AS258 |
|
Encoder
Multiplexer |
AS | 4.5 | 5.5 | 4 | 5 | 125 | 25.2 | 8 | 2:1 | 3-State Output | 48 | -15 | Catalog | 0 to 70 |
PDIP | 16
SO | 16 |
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SO: 80 mm2: 7.8 x 10.2 (SO | 16) |
2 | 5 | 0.75 | 2 |