EM6AB080WKB-5H datasheet(13/62 Pages) ETRON

13 / 62 page

EtronTech

EM6AB080

Etron Confidential

Rev.1.1

Dec. /2013

Table 17. Recommended A.C. Operating Conditions (VDD = 2.5V ± 0.2V, TA = 0~70 °C)

Symbol

Parameter

Min.

Max.

Unit

VIH (AC) Input High Voltage (AC)

VREF + 0.31

VIL (AC) Input Low Voltage (AC)

VREF – 0.31

VID (AC) Input Different Voltage, CK and CK inputs

0.7

VDDQ + 0.6

VIX (AC) Input Crossing Point Voltage, CK and CK inputs

0.5 x VDDQ-0.2

0.5 x VDDQ+0.2

Note:

1) Enables on-chip refresh and address counters.

2) Min(tCL, tCH) refers to ther smaller of the actual clock low time and actual clock high time as provided to the

device.

3) tHZ and tLZ transitions occur in the same access time windows as valid data transitions. These parameters

are not referenced to a specific voltage level, but specify when the device output is no longer driving(HZ),

or begins driving(LZ).

4) The specific requirement is that DQS be valid (High, Low, or at some point on a valid transition) on or

before this CLK edge. A valid transition is defined as monotonic, and meeting the input slew rate

specifications of the device. When no writes were previously in progress on the bus, DQS will be

transitioning from High-Z to logic LOW. If a previous write was in progress, DQS could be HIGH, LOW, or

transitioning from HIGH to LOW at this time, depending on tDQSS.

5) The maximum limit for this parameter is not a device limit. The device will operate with a greater value for

this parameter, but system performance (bus turnaround) will degrade accordingly.

6) For command/address and CK & CK slew rate ≧ 1.0V/ns.

7) A maximum of eight AUTO REFRESH commands can be posted to any given DDR SDRAM device.

8) Power-up sequence is described in Note 10

9) A.C. Test Conditions

Table 18. SSTL _2 Interface

Reference Level of Output Signals (VREF)

0.5 x VDDQ

Output Load

Reference to the Test Load

Input Signal Levels

VREF+0.31 V / VREF-0.31 V

Input Signals Slew Rate

1 V/ns

Reference Level of Input Signals

0.5 x VDDQ

EM6AB080WKB-5H Datasheet(PDF) 13 Page - Etron Technology, Inc.

EM6AB080WKB-5H Datasheet(HTML) 13 Page - Etron Technology, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Datasheet Download

Link URL