hyb39s256400dt Infineon Technologies Corporation, hyb39s256400dt Datasheet - Page 20

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hyb39s256400dt

Manufacturer Part Number
hyb39s256400dt
Description
256 Mbit Synchronous Dram
Manufacturer
Infineon Technologies Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
hyb39s256400dt-7
Manufacturer:
TI
Quantity:
5
Notes
1. For proper power-up see the operation section of this data sheet.
2. AC timing tests
3. If clock rising time is longer than 1 ns, a time (
4. If
5. These parameter account for the number of clock cycles and depend on the operating frequency
6. Access time from clock
7. It is recommended to use two clock cycles between the last data-in and the precharge command
8. When a Write command with AutoPrecharge has been issued, a time of tdal(min) has be fullfilled
INFINEON Technologies
the 1.4 V crossover point. The transition time is measured between
measurements assume
t
with an input signal of 1V / ns edge rate between 0.8 V and 2.0 V.
of the clock, as follows:
the number of clock cycles = specified value of timing period (counted in fractions as a whole
number)
Data out hold time
in case of a write command without Auto-Precharge. One clock cycle between the last data-in
and the precharge command is also supported, but restricted to cycle times tck greater or equal
the specified twr value, where tck is equal to the actual system clock time
before the next Activate Command can be applied. For each of the terms, if not already an
integer, round up to the next highest integer. tck is equal to the actual system clock time.
AC
C L O C K
IN P U T
O U T P U T
t
T
and
is longer than 1 ns, a time (
t
IS
t
OH
1 .4 V
parameters are measured with a 50 pF only, without any resistive termination and
for LV-TTL versions
t
t
L Z
IH
t
OH
t
A C
is 1.8 ns for PC133 components with no termination and 0 pF load.
t
t
AC
T
1 .4 V
t
C L
= 1 ns with the AC output load circuit shown in figure below. Specified
is 4.6 ns for PC133 components with no termination and 0 pF load,
t
T
have
t
t
− 1) ns has to be added to this parameter.
O H
C H
t
T
t
t
A C
H Z
V
2.4 V
0.4 V
IL
= 0.4 V and
IO.vsd
20
t
T
1.4 V
HYB39S256400/800/160DT(L)/DC(L)
/2 − 0.5) ns has to be added to this parameter.
V
256MBit Synchronous DRAM
IH
= 2.4 V with the timing referenced to
Measurement conditions for
I/O
t
AC
V
IH
and
and
50 pF
t
OH
V
2002-04-23
IL
. All AC

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