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SY2114A-4 Datasheet
Test conditions assume signal transition time of 5 ns or less timing reference levels of l.5V, input pulse levels of O t0 3.OV, and output loading of the specified IOL/IOH and 100-pF load capacitance. At any given temperature and voltage condition, tHZCE iS less than tLZCE, tHZOE iS less than ti_ZOE, and tHZWE iS less than tl_ZWE for any given device. tHZOE, tHZCE, and tHZWE are specifIed with CL = 5 pF as in part (b) ofAC Test Loads. Transition is measured +200 mV from steady-state voltage. The internal write time of the memory is defined by the overlap of CEi LOW, CE2 HIGH, and WE LOW. CEi and WE signals must be LOW and CE2 HIGH to initiate a write and either signal can terminate a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge ofthe signalthat terminates the write The minimum write cycle time for write cycle #3 (WE controlled, OE LOW) is the sum oftHZWE and tSD
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etxclk In 104MHz transmit byte clock. The Core samples all Utopia Transmit signals on txclk rising edge.
etxdata[15:0] ln Transmit data bus.
etxprty ln Transmit data bus parity. Standard odd or non-standard even parity can be optionally checked by the connected Slave. When the parity check is disabled during the Core configuration, or not used in the design, the pin txprty should be left open.
etxsoc ln Transmit start of cell. Asserted by the Master to indicate that the current word is the first word of a cell.
etxenb ln Active low transmit data transfer enable.
etxclav[0] Out Cell buffer available. Asserted in octet level transfers to indicate to the Master that the FIFO is almost full (Active low) or, in cell level transfers, to indicate to the Master that the PHY port FIFO has space to accept one cell.
etxclav[3:1] (0) Out Extra FIFO Full / Cell buffer available. In MPHY mode and when direct status indication is selected during the Core configuration, one txclav signal is implemented per PHY port. The maximum number of clav signals is limited to fou r.
etxaddr[4:0] ln Utopia transmit address. When the Core operates in MPHY mode, address bus used during polling and slave port selection. Bit 4 is the MSB. txaddr(4:0) becomes optional (And should be left open) when the Core does not operate in MPHY mode.


Switching system This low.level switching system was designed for switching low powers in electronic circuits. The switching system assures reliable switching of loads. Single.break momentary contact. as normally open or normally closed with 4 independent points of contact. Special features are the long life, extremely short rebound time and stable contact resistance.