PC133-222-520 查看數據表（PDF） - Infineon Technologies

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PC133-222-520

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

Infineon Technologies 

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 VIL = 0.4 V and VIH = 2.4 V with the timing referenced to the 1.4 V crossover

point. The transition time is measured between VIH and VIL. All AC measurements assume

tT = 1 ns with the AC output load circuit show. Specified tAC and tOH 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 (tT/2 – 0.5) ns must be added to this parameter.

6. Rated at 1.4 V

7. If tT is longer than 1 ns, a time (tT – 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 tRC 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

tAC and tOH

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

11

9.01

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