HYB18T512400B datasheet(28/68 Pages) QIMONDA

28 / 68 page

Internet Data Sheet

Rev. 1.1, 2007-05

03292006-YBYM-WG0Z

HYB18T512[40/80/16]0B[C/F]

512-Mbit Double-Data-Rate-Two SDRAM

5.2

DC Characteristics

TABLE 24

Recommended DC Operating Conditions (SSTL_18)

TABLE 25

ODT DC Electrical Characteristics

TABLE 26

Input and Output Leakage Currents

Symbol

Parameter

Rating

Unit

Note

Min.

Typ.

Max.

Supply Voltage

1.7

1.8

1.9

DDQ tracks with VDD, VDDDL tracks with VDD. AC parameters are measured with VDD, VDDQ and VDDDL tied together.

DDDL

Supply Voltage for DLL

1.7

1.8

1.9

DDQ

Supply Voltage for Output

1.7

1.8

1.9

REF

Input Reference Voltage

0.49

× V

DDQ

0.5

× V

DDQ

0.51

× V

DDQ

2)3)

2) The value of

REF may be selected by the user to provide optimum noise margin in the system. Typically the value of VREF is expected to

be about 0.5

× V

DDQ of the transmitting device and VREF is expected to track variations in VDDQ.

3) Peak to peak ac noise on

REF may not exceed ± 2% VREF (dc)

Termination Voltage

REF – 0.04

REF

REF + 0.04

TT is not applied directly to the device. VTT is a system supply for signal termination resistors, is expected to be set equal to VREF, and

must track variations in die dc level of

REF.

Parameter / Condition

Symbol

Min.

Nom.

Max.

Unit

Note

Termination resistor impedance value for

EMRS(1)[A6,A2] = [0,1]; 75 Ohm

Rtt1(eff)

Ω

Measurement Definition for Rtt(eff): Apply VIH(ac) and VIL(ac) to test pin separately, then measure current I(VIHac) and I(VILac) respectively.

Rtt(eff) = (VIH(ac) – VIL(ac)) /(I(VIHac) – I(VILac)).

Termination resistor impedance value for

EMRS(1)[A6,A2] =[1,0]; 150 Ohm

Rtt2(eff)

120

150

180

Ω

Termination resistor impedance value for

EMRS(1)(A6,A2)=[1,1]; 50 Ohm

Rtt3(eff)

Ω

Deviation of VM with respect to VDDQ / 2

delta VM

–6.00

—

+ 6.00

2) Measurement Definition for VM: Turn ODT on and measure voltage (VM) at test pin (midpoint) with no load:

delta VM =((2 xVM /VDDQ) – 1) x 100 %

Symbol

Parameter / Condition

Min.

Max.

Unit

Note

Input Leakage Current; any input 0 V <

VIN < V

–2

µA

1) All other pins not under test = 0 V

Output Leakage Current; 0 V < VOUT <

DDQ

–5

µA

2) DQ’s, LDQS, LDQS, UDQS, UDQS, DQS, DQS, RDQS, RDQS are disabled and ODT is turned off.

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