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EDB8164B4PR-1DITF-R 数据表(PDF) 123 Page - Micron Technology |
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EDB8164B4PR-1DITF-R 数据表(HTML) 123 Page - Micron Technology |
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123 / 152 page  4. Pull-down and pull-up output driver impedances should be calibrated at 0.5 x VDDQ. 5. Measurement definition for mismatch between pull-up and pull-down, MMPUPD: Measure RONPU and RONPD, both at 0.5 × VDDQ: MMPUPD = R ONPU – RONPD × 100 R ON,nom For example, with MMPUPD (MAX) = 15% and RONPD = 0.85, RONPU must be less than 1.0. Output Driver Temperature and Voltage Sensitivity If temperature and/or voltage change after calibration, the tolerance limits widen. Table 84: Output Driver Sensitivity Definition Resistor VOUT Min Max Unit RONPD 0.5 × VDDQ 85 – (dRONdT ΔT|) – (dRONdV ΔV|) 115 + (dRONdT ΔT|) + (dRONdV ΔV|) % RONPU Notes: 1. ΔT = T - T (at calibration). ΔV = V - V (at calibration). 2. dRONdT and dRONdV are not subject to production testing; they are verified by design and characterization. Table 85: Output Driver Temperature and Voltage Sensitivity Symbol Parameter Min Max Unit RONdT RON temperature sensitivity 0.00 0.75 %/˚C RONdV RON voltage sensitivity 0.00 0.20 %/mV Output Impedance Characteristics Without ZQ Calibration Output driver impedance is defined by design and characterization as the default set- ting. Table 86: Output Driver DC Electrical Characteristics Without ZQ Calibration RONnom Resistor VOUT Min Typ Max Unit Ω RON34PD 0.5 × VDDQ 0.70 1.00 1.30 RZQ/7 RON34PU 0.5 × VDDQ 0.70 1.00 1.30 RZQ/7 Ω RON40PD 0.5 × VDDQ 0.70 1.00 1.30 RZQ/6 RON40PU 0.5 × VDDQ 0.70 1.00 1.30 RZQ/6 Ω RON48PD 0.5 × VDDQ 0.70 1.00 1.30 RZQ/5 RON48PU 0.5 × VDDQ 0.70 1.00 1.30 RZQ/5 Ω RON60PD 0.5 × VDDQ 0.70 1.00 1.30 RZQ/4 RON60PU 0.5 × VDDQ 0.70 1.00 1.30 RZQ/4 Ω RON80PD 0.5 × VDDQ 0.70 1.00 1.30 RZQ/3 RON80PU 0.5 × VDDQ 0.70 1.00 1.30 RZQ/3 216-Ball and 220-Ball, Dual-Channel LPDDR2 SDRAM Output Driver Impedance 09005aef85eb530a 216b_220b_2ch_2e0e_embedded_lpddr2.pdf – Rev. F 08 /16 EN 123 Micron Technology, Inc. reserves the right to change products or specifications without notice. © 2014 Micron Technology, Inc. All rights reserved. |
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