Features: · Multiplexed Real-Time and Latched Data
· Byte Control for Byte-Write Applications
· Useful in NuBus Interface Applications
· Useful in Memory Interleave Applications
· BiCMOS Design Substantially Reduces
andby Current
· Dependable Texas Instruments Quality and eliabilityPinout
SpecificationsSupply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input voltage (all inputs and I/O ports) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65° to 150° C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other conditions beyond those indicated in the "recommended operating conditions" section of
this specification is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to GND.DescriptionThe 'BCT2423A and 'BCT2424A are general-purpose 16-bit bidirectional transceivers with data storage latches and byte control circuitry arranged for use in applications where two separate data paths must be multiplexed onto, or demultiplexed from, a single data path. Typical applications include multiplexing and/or demultiplexing of address and data information in microprocessor- or bus-interface applications. These devices are also useful in memory-interleaving applications. The 'BCT2423A and 'BCT2424A offer inverted and noninverted data paths, respectively.
The 'BCT2423A and 'BCT2424A were designed using Texas Instruments BiCMOS process, which features bipolar drive characteristics, but also greatly reduces the standby power of the device when disabled. This is valuable when the device is not performing an address or data transfer.
SN74BCT2424A Three 16-bit I/O ports, A15A0, B15B0, and AB15AB0 are available for address and/or data transfer. The AENM, AENL, BENM, BENL, ABENM, and ABENL inputs control the bus transceiver functions. These control signals also allow byte-control of the most significant byte and least significant byte for each bus. Address and/or data information can be stored using the internal storage latches. The ALE, BLE, ABLEA, and ABLEB inputs are active low, and are used to control data storage. When the latch enable input is low, the latch is transparent. When the latch enable input goes high, the data present at the inputs is latched, and remains latched until the latch enable input is returned low.
SN74BCT2424A Data on the 'A' bus and 'B' bus are multiplexed onto the 'AB' bus via the A /BSEL control line. When A /BSEL is low, A15A0 is mapped to the AB15AB0 outputs. When A /BSEL is high, B15B0 is mapped to the AB15AB0 outputs.
The SN74BCT2423A and SN74BCT2424A are characterized for operation from 0°C to 70°C.
SN74BCT2424A Data Sheet
