70T653MS12BCGI datasheet(15/24 Pages) IDT

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IDT70T653M

High-Speed 2.5V 512K x 36 Asynchronous Dual-Port Static RAM

Industrial and Commercial Temperature Ranges

NOTES:

1. Port-to-port delay through RAM cells from writing port to reading port, refer to Timing Waveform of Write with Port-to-Port Read.

2. To ensure that the earlier of the two ports wins.

3. tBDD is a calculated parameter and is the greater of the Max. spec, tWDD – tWP (actual), or tDDD – tDW (actual).

4. To ensure that the write cycle is inhibited on port "B" during contention on port "A".

5. To ensure that a write cycle is completed on port "B" after contention on port "A".

AC Electrical Characteristics Over the

Operating Temperature and Supply Voltage Range

Symbol

Parameter

70T653MS10

Com'l Only

70T653MS12

Com'l

& Ind

70T653MS15

Com'l Only

Unit

Min.

Max.

Min.

Max.

Min.

Max.

BUSY

TIMING

tWB

BUSY

Input to Write(4)

____

tWH

Write Hold After BUSY(5)

____

PORT-TO-PORT DELAY TIMING

tWDD

Write Pulse to Data Delay(1)

____

tDDD

Write Data Valid to Read Data Delay(1)

____

5679 tbl 15

Symbol

Parameter

70T65M3S10

Com'l Only

70T653MS12

Com'l

& Ind

70T6539MS15

Com'l Only

Min.

Max.

Min.

Max.

Min.

Max.

SLEEP MODE TIMING (ZZx=VIH)

tZZS

Sleep Mode Set Time

____

tZZR

Sleep Mode Reset Time

____

tZZPD

Sleep Mode Power Down Time(4)

____

tZZPU

Sleep Mode Power Up Time(4)

____

5679 tbl 15a

AC Electrical Characteristics Over the

Operating Temperature and Supply Voltage Range(1,2,3)

NOTES:

1. Timing is the same for both ports.

2. The sleep mode pin shuts off all dynamic inputs, except JTAG inputs, when asserted. OPTx, INTx and the sleep mode pins themselves (ZZx) are not affected

during sleep mode. It is recommended that boundary scan not be operated during sleep mode.

3. These values are valid regardless of the power supply level selected for I/O and control signals (3.3V/2.5V). See page 6 for details.

4. This parameter is guaranteed by device characterization, but is not production tested.

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