| Part Numbert | Mfg | Packt | D/C | Descriptiont | Qty | Company/Contact |
PC74HC138P652 PC74HC138P652 PC74HC138P652 Datasheet
PC74HC138P652 PC74HC138P652 PC74HC138P652 Price Clock Generation TSYNC I Transmit synchronization clock. This signalis used to synchronize the transmit clocks and the converter clocks to an external terminal/ bit-rate clock. It is used in the V.32 TSYNC and Asynchronous TSYNC modes and is ignored in other operating modes. The frequency of the external clock must be programmed in Control Register 0. This pin must be tied high or low ifit is not being used. TBIT O Transmit bit rate clock. This is an output clock whose frequency is programmable via Control Register 3. It is synchronized with the TCONV clock. TBAUD O Transmit baud rate clock. This is an output clock whose frequency is programmable via Control Register 3. It is synchronized with the TCONV clock. PC74HC138P652 PC74HC138P652 PC74HC138P652 on stock
Instructions that involve data transactions on DQ3 1-0, and are therefore executed on a subsequent Read or Write cycle with the /AV line LOW, are all Read/Write Memory and Read/Write Register instructions, Read Validity, Write PA3-0. All other instructions are executed in a single cycle with the state of DQ13 being interpreted as the state ofthe /W line during the equivalent hardware control state. |
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