HYS64V16300GU Datasheet, PDF (11/20 Pages) Infineon Technologies AG – 3.3 V 16M x 64/72-Bit 1 Bank 128MByte SDRAM Module 3.3 V 32M x 64/72-Bit 2 Bank 256MByte SDRAM Module 168-Pin Unbuffered DIMM Modules

HYS 64/72V16300/32220GU
SDRAM-Modules
Notes
3. All AC characteristics are shown on SDRAM component level.
An initial pause of 100 µs is required after power-up, then a Precharge All Banks command must
be given followed by eight Auto-Refresh (CBR) cycles before the Mode Register Set Operation
can begin.
4. AC timing tests have V_IL = 0.4 V and V_IH = 2.4 V with the timing referenced to the 1.4 V crossover
point. The transition time is measured between V_IH and V_IL. All AC measurements assume
t_T = 1 ns with the AC output load circuit show. Specified t_AC and t_OH parameters are measured
with a 50 pF only, without any resistive termination and with a input signal of 1 V/ns edge rate
between 0.8 V and 2.0 V.
5. If clock rising time is longer than 1 ns, a time (t_T/2 – 0.5) ns must be added to this parameter.
6. Rated at 1.4 V
7. If t_T is longer than 1 ns, a time (t_T – 1) ns has to be added to this parameter.
8. Anytime the Refresh Period has been exceeded, a minimum of two Auto-Refresh (CBR)
commands must be given to “wake-up” the device.
9. Timing is asynchronous. If setup time is not met by rising edge of the clock then the CKE signal
is assumed latched on the next cycle.
10.Self-Refresh Exit is a synchronous operation and begins on the second positive clock edge after
CKE returns high. Self-Refresh Exit is not complete until a time period equal to t_RC is satisfied
after the Self Refresh Exit command is registered.
11.This is referenced to the time at which the output achieves the open circuit condition, not to
output voltage levels.
CLOCK 1.4 V
tIS
t IH
t CH
2.4 V
0.4 V
t CL
tT
INPUT
OUTPUT
1.4 V
tAC
t LZ
tAC
t OH
t HZ
1.4 V
IO.vsd
I/O
50 pF
Measurement conditions for
t_AC and t_OH
A Serial Presence Detect storage device—E²PROM—is assembled onto the module. Information about the
module configuration, speed, etc. is written into the E²PROM device during module production using a Serial
Presence Detect protocol (I²C synchronous 2-wire bus).
INFINEON Technologies
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