tc59lm814 TOSHIBA Semiconductor CORPORATION, tc59lm814 Datasheet - Page 9

• Manufacturer Part Number: tc59lm814
• Description: 256mbits Network Fcram1
• Manufacturer: TOSHIBA Semiconductor CORPORATION

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
There parameters are measured from the differential clock (CLK and CLK ) AC cross point.
These parameters are measured from signal transition point of DQS crossing V
Te 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.
When t
version.
(AC)
V
SWING
SLEW = (V
REFI (max)
REFI (min)
DQSS
CK
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
is between 8.5ns and 12ns at “-50” product, all AC timing parameters refer to spec of “-60” speed
= 0.75 × t
IH min
∆T
applies to equally distributed refresh method.
applies to both burst refresh method and distribted refresh method.
(AC) − V
V
CK
V
DDQ
SS
, t
CK
IL max
= 5 ns, 0.75 × 5 ns = 3.75 ns is rounded up to 3.8 ns.)
∆T
(AC))/∆T
PARAMETER
Output
DDQ
V
V
V
IH min
REF
IL max
IH min
/2 ± 0.2 V from steady state.
(AC)
(AC)
(DC) and V
CK
contains more than one decimal place, the result is
Measurement point
Output
IL max
(DC).
TC59LM814/06CTG-50,-60
V
V
REF
REF
V
V
V
VALUE
V
X
DDQ
DDQ
1.0
1.5
1.0
Z = 50 Ω
REF
AC Test Load
(AC)
+ 0.35
− 0.35
/2
/2
C
L
REF
= 30 pF
level.
UNIT
2005-06-21 9/39
V/ns
V
V
V
V
V
V
V
V
V
R
TT
T
V
= 50 Ω
REF
Rev 1.2
NOTES