SCDS167A May 2004 – July 2022 SN74CB3Q16211
PRODUCTION DATA
The SN74CB3Q16211 device is organized as two 12-bit bus switches with separate output-enable (1 OE, 2 OE) inputs. It can be used as two 12-bit bus switches or as one 24-bit bus switch. When OE is low, the associated 12-bit bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the associated 12-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging current backflow through the device when it is powered down.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
INPUT OE |
INPUT/OUTPUT A |
FUNCTION |
---|---|---|
L | B | A port = B port |
H | Z | Disconnect |