IDT7134LA55CB datasheet(6/9 Pages) IDT

6 / 9 page

6.04

IDT7134SA/LA

HIGH-SPEED 4K x 8 DUAL-PORT STATIC RAM

MILITARY AND COMMERCIAL TEMPERATURE RANGES

TIMING WAVEFORM OF READ CYCLE NO. 2, EITHER SIDE(1, 3)

2720 drw 09

DATAOUT

VALID DATA (4)

tPD

tAOE(4)

tACE

tHZ(2)

tLZ(1)

tPU

50%

ICC

ISB

CURRENT

tHZ(2)

NOTES:

1. Timing depends on which signal is asserted last,

OE or CE.

2. Timing depends on which signal is de-asserted first,

OE or CE.

3. R/

W = VIH.

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

5. tAA for RAM Address Access and tSAA for Semaphore Address Access.

AC ELECTRICAL CHARACTERISTICS OVER THE

OPERATING TEMPERATURE AND SUPPLY VOLTAGE(6)

7134X20

(5)

7134X25

7134X35

Symbol

Parameter

Min.

Max.

Min.

Max.

Min.

Max.

Unit

WRITE CYCLE

tWC

Write Cycle Time

—

tEW

Chip Enable to End-of-Write

—

tAW

Address Valid to End-of-Write

—

tAS

Address Set-up Time

—

tWP

Write Pulse Width

—

tWR

Write RecoveryTime

—

tDW

Data Valid to End-of-Write

—

tHZ

Output High-Z Time

(1, 2)

—15—

—20

tDH

Data Hold Time

(3)

0—

—

3—

tWZ

Write Enabled to Output in High-Z

(1, 2)

—15—

—20

tOW

Output Active from End-of-Write

(1, 2, 3)

3—

—

3—

tWDD

Write Pulse to Data Delay

(4)

—40—

—60

tDDD

Write Data Valid to Read Data Delay

(4, 7)

—30—

—35

NOTES:

2720 tbl 10

1. Transition is measured

±500mV 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. 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.

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

5. (Commercial only), 0

°C to +70°C temperature range .

6. “X” in part number indicates power rating (SA or LA).

7. tDDD = 35ns for military temperature range.

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