Electronic digital logic circuitry – Interface – Supply voltage level shifting
Patent
1996-04-23
1997-10-21
Westin, Edward P.
Electronic digital logic circuitry
Interface
Supply voltage level shifting
326 68, 326119, H03K 190185
Patent
active
056800630
ABSTRACT:
A bi-directional voltage translator (102) includes a first port (300/302), a second port (302/300), and a switch circuit (310). The first port (300/302) communicates a first signal at a first voltage or a second voltage (V.sub.1 /V.sub.2). The second port (302/300) communicates a second signal at the first voltage or a third voltage (V.sub.2 /V.sub.1). The second and third voltages (V.sub.1 /V.sub.2) are different. The switch circuit (310) is coupled to the first port (300/302) and the second port (302/300). The switch circuit (310), responsive to the first signal at the first voltage and the second signal at the third voltage (V.sub.2/ V.sub.1), communicates to the second port (302/300) the second signal at the first voltage. The switch circuit (310), responsive to the second signal at the first voltage and the first signal at the second voltage (V.sub.1 /V.sub.2), communicates to the first port (300/302) the first signal at the first voltage.
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Philips Semiconductors, Jul. 1994: Octal Dual Supply Transiating Transceiver; 3-State, 74 LVC4245, pp. 3-137-3-1542; 16-bit Bus Transciever With Direction Pin; 3-State, 74LVC16245, pp. 5-18-5-21.
U.S. Patent Application CE01288R-Ng et al, filed 3 Jan. 1996 by Motorola. Ser. No. 08/583,209.
Ludwig Thomas Richard
Ng Richard
Motorola Inc.
Patrick Mark D.
Santamauro Jon
Vaas Randall S.
Westin Edward P.
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