EM638165 Etron Technology Inc., EM638165 Datasheet - Page 17

• Manufacturer Part Number: EM638165
• Description: 4Mega x 16 Synchronous DRAM (SDRAM)
• Manufacturer: Etron Technology Inc.

Electrical Characteristics and Recommended A.C. Operating Conditions
(V
* CL is CAS# Latency.
Note:
1. Stress greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to
2. All voltages are referenced to V
3. These parameters depend on the cycle rate and these values are measured by the cycle rate under the
4. These parameters depend on the output loading. Specified values are obtained with the output open.
5. Power-up sequence is described in Note 11.
Preliminary
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RC
RCD
RP
RRD
RAS
WR
CCD
CK2
CK3
CH
CL
AC2
AC3
OH
LZ
HZ
IS
IH
PDE
DD
the device.
minimum value of t
= 3.3V¡ Ó 0 .3V, Ta = -40~85°C) (Note: 5, 6, 7, 8)
Row cycle time
(same bank)
RAS# to CAS# delay
(same bank)
Precharge to refresh/row activate command
(same bank)
Row activate to row activate delay
(different banks)
Row activate to precharge time
(same bank)
Write recovery time
CAS# to CAS# Delay time
Clock cycle time
Clock high time
Clock low time
Access time from CLK
(positive edge)
Data output hold time
Data output low impedance
Data output high impedance
Data/Address/Control Input set-up time
Data/Address/Control Input hold time
Power Down Exit set-up time
CK
A.C. Parameter
and t
RC
. Input signals are changed one time during t
SS
.
CL* = 2
CL* = 3
CL* = 2
CL* = 3
17
1/0.8/0.8/0.8/0.8
60/63/68/70/80
18/20/20/20/24
18/20/20/20/24
12/14/15/20/25
42/45/45/48/50
1/1.5/1.3/2/2.5
- / - /10/10/13
2/2.5/2.5/3/3
2/2.5/2.5/3/3
2.5/2.7/3/3/3
6/7/7.5/8/10
6/7/7.5/8/10
Min.
2
1
1
-
6/7/7.5/8/10
5/5.4/5.4/6/7
5/5.4/5.4/6/7
- / - /6/6/7
Max.
CK
.
Rev 0.6
EM638165
CLK
Unit
ns
ns
Note
Feb. 2001
10
10
10
10
10
9
9
8