Datasheet > 70V261L55PFGI

70V261L55PFGI

更新时间： 2022-02-26 09:01:06

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
17页	338K
描述
HIGH-SPEED 3.3V 16K x 16 DUAL-PORT STATIC RAM

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70V261L55PFGI 数据手册

IDT70V261S/L

High-Speed 16K x 16 Dual-Port Static RAM with Interrupt

Industrial and Commercial Temperature Ranges

Waveform of Read Cycles⁽⁵⁾

tRC

ADDR

(4)

ACE

(4)

AOE

(4)

ABE

UB, LB

R/W

(1)

tOH

tLZ

VALID DATA⁽⁴⁾

DATAOUT

BUSYOUT

(2)

tHZ

(3,4)

3040 drw 0

tBDD

NOTES:

1. Timing depends on which signal is asserted last, OE, CE, LB, or UB.

2. Timing depends on which signal is de-asserted first CE, OE, LB, or UB.

3. tBDD delay is required only in cases where the opposite port is completing a write operation to the same address location. For simultaneous read operations BUSY has no

relation to valid output data.

4. Start of valid data depends on which timing becomes effective last tAOE, tACE, tAA or tBDD.

5. SEM = VIH.

AC Electrical Characteristics Over the

OperatingTemperatureandSupplyVoltage⁽⁵⁾

70V261X25

70V261X35

Com'l Only

70V261X55

Com'l Only

Com'l

& Ind

Symbol

Parameter

Min.

Max.

Min.

Max.

Min.

Max.

Unit

WRI TE CYCLE

____

SWRD

SPS

Write Cycle Time

Chip Enable to End-of-Write⁽³⁾

Address Valid to End-of-Write

Address Set-up Time⁽³⁾

Write Pulse Width

Write Recovery Time

Data Valid to End-of-Write

Output High-Z Time^(1,2)

Data Hold Time⁽⁴⁾

____

Write Enable to Output in High-Z^(1,2)

Output Active from End-of-Write^{(1, 2,4)}

SEM Flag Write to Read Time

SEM Flag Contention Window

____

3040 tbl 12

NOTES:

1. Transition is measured 0mV from Low- or High-impedance voltage with Output Test Load (Figure 2).

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

3. To access RAM, CE = VIL and SEM = VIH. To access semaphore, CE = VIH and SEM = VIL. Either condition must be valid for the entire tEW time.

4. The specification for tDH must be met by the device supplying write data to the RAM under all operating conditions. Although tDH and tOW values will vary over voltage and

temperature, the actual tDH will always be smaller than the actual tOW.

5. 'X' in part number indicates power rating (S or L).

6.42

1...4 5 678 9 10...17

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