參數(shù)資料
型號(hào)： K4T1G044QC-ZCLE6
元件分類： DRAM
英文描述： 256M X 4 DDR DRAM, 0.45 ns, PBGA60
封裝： ROHS COMPLIANT, FBGA-60
文件頁(yè)數(shù)： 5/26頁(yè)
文件大?。?/td> 487K
代理商： K4T1G044QC-ZCLE6
DDR2 SDRAM
K4T1G044QC
K4T1G084QC
Rev. 1.1 June 2007
13 of 26
Note :
1. Absolute Specifications (0°C
≤ TCASE ≤ +95°C; VDD = +1.8V ±0.1V, VDDQ = +1.8V ±0.1V)
2. Impedance measurement condition for output source dc current: VDDQ = 1.7V; VOUT = 1420mV; (VOUT-VDDQ)/Ioh must be less than 23.4 ohms for
values of VOUT between VDDQ and VDDQ- 280mV. Impedance measurement condition for output sink dc current: VDDQ = 1.7V; VOUT = 280mV;
VOUT/Iol must be less than 23.4 ohms for values of VOUT between 0V and 280mV.
3. Mismatch is absolute value between pull-up and pull-dn, both are measured at same temperature and voltage.
4. Slew rate measured from VIL(AC) to VIH(AC).
5. The absolute value of the slew rate as measured from DC to DC is equal to or greater than the slew rate as measured from AC to AC. This is guaran-
teed by design and characterization.
6. This represents the step size when the OCD is near 18 ohms at nominal conditions across all process and represents only the DRAM uncertainty.
Output slew rate load :
7. DRAM output slew rate specification applies to 400Mb/sec/pin, 533Mb/sec/pin, 667Mb/sec/pin and 800Mb/sec/pin speed bins.
8. Timing skew due to DRAM output slew rate mis-match between DQS / DQS and associated DQs is included in tDQSQ and tQHS specification.
Description
Parameter
Min
Nom
Max
Unit
Notes
Output impedance
Normal 18ohms
See full strength default driver characteristics
ohms
1,2
Output impedance step size for OCD calibration
0
1.5
ohms
6
Pull-up and pull-down mismatch
0
4
ohms
1,2,3
Output slew rate
Sout
1.5
5
V/ns
1,4,5,6,7,8
25 ohms
VTT
Output
(VOUT)
Reference
Point
9.0 OCD default characteristics
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