6

AC CHARACTERISTICS READ CYCLE (Pre/Post-Radiation)*

Notes: * Post-radiation performance guaranteed at 25

°C per MIL-STD-883 Method 1019.

1. Functional test.

2. Three-state is defined as a 500mV change from steady-state output voltage (see Figure 3).

3. The ET (enable true) notation refers to the falling edge of E. SEU immunity does not affect the read parameters.

4. The EF (enable false) notation refers to the rising edge ofE. SEU immunity does not affect the read parameters.

SYMBOL

PARAMETER

MIN

MAX

UNIT

1

Read cycle time

100

ns

t

AVQV

Read access time

100

ns

2

Output hold time

10

ns

2

G-controlled Output Enable time

5

ns

G-controlled Output Enable time (Read Cycle 3)

50

ns

2

G-controlled output three-state time

30

ns

2,3

E-controlled Output Enable time

10

ns

t

ETQV

3

E-controlled access time

100

ns

1,2,4

E-controlled output three-state time

30

ns

{

{

}

}

Active to High Z Levels

High Z to Active Levels

Figure 3. 5-Volt SRAM Loading