M67025E Datasheet, PDF (13/27 Pages) ATMEL Corporation – Rad. Tolerant High Speed 8 Kb x 16 Dual Port RAM

AC Parameters
AC Test Conditions
Input Pulse Levels: GND to 3.0V
Input Rise/Fall Times: 5 ns
Input Timing Reference Levels: 1.5V
Output Reference Levels: 1.5V
Output Load: See Figures 2, 3
Figure 2. Output Load
Figure 3. Output Load (for t_HZ, t_LZ, t_WZ, and t_OW)
1(1)
(₁1)
Note: 1. Including scope and jig.
AC Read Characteristics
Table 7. Over the Full Operating Temperature and Supply Voltage Range
Read Cycle
Symbol⁽⁴⁾
Symbol⁽⁵⁾
Parameter
M
67025-30
M
67025-45
Min. Max. Min. Max. Unit
TAVAVR
TAVQV
TELQV
TBLQV
TGLQV
TAVQX
TELQX
TEHQZ
TPU
TPD
TSOP
TSLQV
t_RC
Read cycle time
t_AA
Address access time
t_ACS
Chip Select access time⁽³⁾
t_ABE
Byte enable access time⁽³⁾
t_AOE
Output enable access time
t_OH
Output hold from address change
t_LZ
Output low Z time ^{(1) (2)}
t_HZ
Output high Z time ^{(1) (2)}
t_PU
Chip Select to power up time ⁽²⁾
t_PD
Chip disable to power down time ⁽²⁾
t_SOP
SEM flag update pulse (OE or SEM)
t_ACS
Semaphore Access time⁽³⁾
30
–
45
–
ns
–
30
–
45
ns
–
30
–
45
ns
–
30
–
45
ns
–
15
–
25
ns
3
–
3
–
ns
3
–
5
–
ns
–
15
–
20
ns
0
–
0
–
ns
–
50
–
50
ns
15
–
15
–
ns
–
30
–
45
ns
Notes:
1. Transition is measured +500 mV from low or high impedance voltage with load (Figure 2 and Figure 3).
2. This parameter is guaranteed but not tested.
3. To access RAM CS = VIL, UB or LB = VIL, SEM = VIH. To access semaphore CS = VIH, SEM = VIL. Refer to Table 1.
4. STD symbol.
5. ALT symbol.
13 M67025E
4146J–AERO–06/03