SN74ABT16652

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 7 V
Input voltage range, V_I (except I/O ports) (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 7 V
Voltage range applied to any output in the high or power-off state, V_O  . . . . . . . . . . . . . . . . . . ....0.5 V to 5.5 V
Current into any output in the low state, I_O:SN54ABT16652 . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...... . . . . .96 mA 
                                                                      SN74ABT16652  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  ........128 mA
Input clamp current, I_IK (V_I < 0)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 mA
Output clamp current, I_OK (V_O < 0)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mA
Package thermal impedance, Q_JA (see Note 2): DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....74°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C .

The 'ABT16652 are 16-bit bus transceivers that consist 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. These devices can be used as two 8-bit transceivers or one 16-bit transceiver.

Output-enable (OEAB and OEBA) inputs of  'ABT16652  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. 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. A low input selects real-time data, and a high input selects stored data. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the 'ABT16652.

Data on the A- or B-data bus, or both, can be stored in the internal D-type flip-flops by low-to-high transitions at the appropriate clock (CLKAB or CLKBA)    inputs regardless of the select- or enable-control inputs. When SAB and SBA are in the real-time transfer mode, it is possible to store data without using the internal D-type flip-flops by simultaneously enabling OEAB and OEBA. In this configuration, each output reinforces its input. When all other data sources of  'ABT16652  to the two sets of bus lines are at high impedance, each set of bus lines remains at its last state.