tc59lm818dmg TOSHIBA Semiconductor CORPORATION, tc59lm818dmg Datasheet - Page 10

• Manufacturer Part Number: tc59lm818dmg
• Description: 288mbits Network Fcram2 ? 4,194,304-words ? 4 Banks ? 18-bits
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(10)
AC TEST CONDITIONS
NOTES:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
V
V
V
V
V
Vr
V
SLEW
V
IH (min)
IL (max)
REF
TT
SWING
ID
OTR
SYMBOL
Transition times are measured between V
Transition (rise and fall) of input signals have a fixed slope.
If the result of nominal calculation with regard to t
rounded up to the nearest decimal place.
(i.e., t
These parameters are measured from the differential clock (CLK and CLK ) AC cross point.
These parameters are measured from signal transition point of DS crossing V
The t
The t
In such case, the average interval of eight consecutive Auto-Refresh commands has to be more than 400 ns
always. In other words, the number of Auto-Refresh cycles which can be performed within 3.2 µs (8 × 400 ns)
is to 8 times in the maximum.
Low Impedance State is specified at V
High Impedance State is specified where output buffer is no longer driven.
These parameters depend on the clock jitter. These parameters are measured at stable clock.
Output timing is measured by using Normal driver strength at V
Output timing is measured by using Strong driver strength at V
These parameters are measured at t
are specified as below for all speed version.
t
(AC)
CKQS
V
SWING
REFI (max)
REFI (min)
SLEW = (V
DQSS
(MIN/MAX) = −0.6ns / 0.6ns, t
Input High Voltage (minimum)
Input Low Voltage (maximum)
Input Reference Voltage
Termination Voltage
Input Signal Peak to Peak Swing
Differential Clock Input Reference Level
Input Differential Voltage
Input Signal Minimum Slew Rate
Output Timing Measurement Reference Voltage
= 0.8 × t
IH min
∆T
applies to both burst refresh method and distributed refresh method.
applies to equally distributed refresh method.
CK
(AC) − V
V
, t
V
DDQ
SS
CK
IL max
= 3.3 ns, 0.8 × 3.3 ns = 2.64 ns is rounded up to 2.7 ns.)
∆T
PARAMETER
(AC))/∆T
CK
AC
DDQ
= minimum ∼6.0ns. When t
(MIN/MAX) = −0.65ns / 0.65ns
V
V
V
IH min
/2 ± 0.1 V from steady state.
IH min
REF
IL max
(AC)
(AC)
(DC) and V
CK
contains more than one decimal place, the result is
IL max
DDQ
DDQ
(DC).
CK
= 1.4 V ∼ 1.6 V.
V
V
= 1.7 V ∼ 1.9 V.
is longer than 6.0ns, these parameters
REF
REF
V
V
V
VALUE
TC59LM818DMG-33,-40
V
X
Measurement point
DDQ
DDQ
0.8
1.0
2.5
REF
(AC)
Output
+ 0.2
− 0.2
/2
/2
REF
AC Test Load
level.
2005-10-19 10/57
25 Ω
UNIT
V/ns
V
V
V
V
V
V
V
V
V
TT
Rev 1.4
NOTES
9