The MC74LVX4245 is a 24-pin dual-supply octal translating transceiver designed to interface between a 5.0V bus and a 3.0V bus in a mixed 3.0V/5.0V supply environment, such as laptop computers using a 3.3V CPU and 5.0V LCD display. The A port interfaces with the 5V bus, and the B port interfaces with the 3.0V bus. The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (active-High) enables data from the A port to the B port. Receive (active-Low) enables data from the B port to the A port. The Output Enable (OE) input, when High, disables both A and B ports by placing them in 3-State.
The MC74LVX4245/DMC74LVX4245 is a dual‑supply, octal translating transceiver designed to interface a 5.0 V bus (A port) with a 3.0 V bus (B port) in mixed‑voltage systems such as notebook computers. Data direction is controlled by the Transmit/Receive (T/R) input, while the Output Enable (OE) input places both ports in a high‑impedance state when asserted high.
Key features include bi‑directional voltage translation, TTL‑compatible control inputs, 24 mA source/sink capability at 5 V and 12 mA at 3 V, guaranteed switching‑noise performance, and availability in SOIC‑24 and TSSOP‑24 packages. The device is functionally compatible with the 74‑series 245 family and is offered in Pb‑free options.
| Output Source/Sink Current | 24 mA at 5 V bus, 12 mA at 3 V bus |
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Each output can source or sink up to 24 mA when powered at 5 V and up to 12 mA when powered at 3 V.
It is offered in SOIC‑24 and TSSOP‑24 surface‑mount packages, both with Pb‑free options.