Packaging information
| Package | Pins SSOP (DL) | 56 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 1,000 | LARGE T&R |
Features for the 74ACT16652
- Members of the Texas Instruments WidebusTM Family
- Inputs Are TTL-Voltage Compatible
- Independent Registers and Enables for A and B Buses
- Multiplexed Real-Time and Stored Data
- Flow-Through Architecture Optimizes PCB Layout
- Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise
- EPICTM (Enhanced-Performance Implanted CMOS) 1-
m Process
- 500-mA Typical Latch-Up Immunity at 125°C
- Package Options Include Plastic 300-mil Shrink Small-Outline (DL) Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Spacings
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
Description for the 74ACT16652
The 'ACT16652 are 16-bit bus transceivers consisting of D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. The devices can be used as two 8-bit transceivers or one 16-bit transceiver.
Complementary output-enable (OEAB and 
) inputs are provided to control
the transceiver functions. Select-control (SAB and SBA) inputs are
provided to select whether real-time or stored data is transferred. A
low input level selects real-time data, and a high input level
selects stored data. The circuitry used for select control eliminates
the typical decoding glitch that occurs in a multiplexer during the
transition between stored and real-time data. Figure 1 illustrates
the four fundamental bus-management functions that can be performed
with the 'ACT16652.
Data on the A or B bus, or both, can be stored in the internal D
flip-flops by low-to-high transitions at the appropriate clock (CLKAB
or CLKBA) inputs, regardless of the levels on the select-control or
output-enable inputs. When SAB and SBA are in the real-time transfer
mode, it is also possible to store data without using the internal
D-type flip-flops by simultaneously enabling OEAB and. In this configuration, each
output reinforces its input. Thus, when all other data sources to the
two sets of bus lines are at high impedance, each set of bus lines
remains at its last state.
The 74ACT16652 is packaged in TI's shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area.
The 54ACT16652 is characterized for operation over the full military temperature range of -55°C to 125°C. The 74ACT16652 is characterized for operation from -40°C to 85°C.