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The \x92FCT138T devices are 1-of-8 decoders. These devices accept three binary weighted inputs (A0, A1, A2) and, when enabled, provide eight mutually exclusive active-low outputs (O\0\x96O\7). The \x92FCT138T devices feature three enable inputs: two active low (E\1, E\2) and one active high (E3 ).
All outputs are high unless E\1 and E\2 are low and E3 is high. This multiple-enable function allows easy parallel expansion of the device to a 1-of-32 (five lines to 32 lines) decoder with just four \x92FCT138T devices and one inverter.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
| 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 Charged Device Model (kV) |
| ESD HBM (kV) |
| CY74FCT138AT | CY74FCT138CT | CY74FCT138T | CY54FCT138T |
|---|---|---|---|
| Decoder Demultiplexer | Decoder/Demultiplexer | ||
| FCT | FCT | FCT | FCT |
| 4.75 | 4.75 | 4.75 | 4.75 |
| 5.25 | 5.25 | 5.25 | 5.25 |
| 1 | 1 | 1 | 1 |
| 5 | 5 | 5 | 5 |
| 70 | 70 | 70 | 70 |
| 0.2 | 0.2 | 0.2 | 0.2 |
| 5.8 | 5 | 6 | 6 |
| 3:8 | 3:8 | 3:8 | 3:8 |
| Standard | Standard | ||
| 64 | 64 | 64 | 64/-32 |
| -32 | -32 | -32 | |
| Catalog | Catalog | Catalog | Military |
| -40 to 85 | -40 to 85 | -40 to 85 | -55 to 125 |
| SOIC SSOP | SOIC SSOP | SSOP | CDIP LCCC |
| 16SOIC: 106 mm2: 10.3 x 10.3(SOIC) 16SSOP: 29 mm2: 6 x 4.9(SSOP) | 16SOIC: 106 mm2: 10.3 x 10.3(SOIC) 16SSOP: 29 mm2: 6 x 4.9(SSOP) | 16SSOP: 29 mm2: 6 x 4.9(SSOP) | See datasheet (CDIP) 20LCCC: 79 mm2: 8.89 x 8.89(LCCC) |
| 8 | 8 | 8 | 8 |
| 5 | 5 | 5 | 5 |
| 0.75 | 0.75 | 0.75 | 0.75 |
| 2 | 2 | 2 | 2 |
| 无样片 | 无样片 |
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