GM72V66841ET/ELT
AC Characteristics (Ta = 0 to 70C, VCC, VCCQ = 3.3 V +/-0.3 V, VSS, VSSQ = 0 V)
(Continued)
- 7
- 75
- 8
- 7K
- 7J
Parameter
Symbol
Unit Notes
Min Max Min Max Min Max Min Max Min Max
Write recovery or data-in
to precharge lead time
Active (a) to Active (b)
command period
7
-
7.5
-
8
-
10
-
10
-
ns
1
1
t
RWL
14
-
-
15
-
-
16
-
-
20
-
-
20
-
-
ns
t
RRD
Refresh period
64
64
64
64
64
ms
t
REF
Notes :
1. AC measurement assumes tT = 1ns. Reference level for timing of input signals is 1.40V.
If tT is longer than 1ns,transition time compensation should be considered.
2. Access time is measured at 1.40V. Load condition is CL = 50pF without termination.
3. tLZ (min)defines the time at which the outputs achieves the low impedance state.
4. tHZ (max)defines the time at which the outputs achieves the high impedance state.
5. tCES define CKE setup time to CKE rising edge except Power down exit command.
Test Condition
• Input and output-timing reference levels: 1.4V
• Input waveform and output load: See following figures
I/O
OPEN
2.4V
0.4V
80%
20%
input
CL
t
T
t
T
-7-
Rev. 1.1/Apr.01
HYNIX [ HYNIX SEMICONDUCTOR ]
