EBE51FD8AGFD Datasheet, PDF (16/22 Pages) Elpida Memory – 512MB Fully Buffered DIMM

EBE51FD8AGFD, EBE51FD8AGFN
Differential Receiver Input Specifications*¹
Parameter
Symbol
min.
Differential peak-to-peak input
voltage
VRX-DIFFp-p
Maximum single-ended voltage
for EI condition (AC + DC)
VRX-IDLE-SE
Maximum single-ended voltage
for EI condition (DC only)
VRX-IDLE-SE-DC
Maximum peak-to-peak differential
voltage for EI condition
VRX-IDLE-DIFFp-p
Single-ended voltage (w.r.t. VSS)
on D+/D-
VRX-SE
Single-pulse peak differential input
voltage
VRX-DIFF-PULSE
Amplitude ratio between adjacent
symbols,
1100mV < VRX-DIFFp-p <= 1300mV
VRX-DIFF-ADJ
RATIO- HI
Amplitude ratio between adjacent
symbols,
VRX-DIFFp-p <= 1100mV
VRX-DIFF-ADJ
RATIO
Maximum RX inherent timing error TRX-TJ-MAX
Maximum RX inherent
deterministic timing error
Single-pulse width at zero-voltage
crossing
Single-pulse width at minimum-
level crossing
Differential RX input rise/fall time
TRX-DJ-DD
TRX-PW-ZC
TRX-PW-ML
TRX-RISE,
TRX-FALL
170



−300
85




0.55
0.2
50
Common mode of the input voltage VRX-CM
120
AC peak-to-peak common mode of
input voltage
VRX-CM-ACp-p

Ratio of VRX-CM-ACp-p to
minimum VRX-DIFFp-p
Differential return loss
VRX-CM-EH-Ratio 
RLRX-DIFF
9
Common mode return loss
RLRX-CM
6
RX termination resistance
RRX
41
D+/D- RX resistance difference RRX-Match-DC

Lane-to-lane PCB skew at Rx
Minimum RX Drift Tolerance
Minimum data tracking 3dB
bandwidth
Electrical idle entry detect time
Electrical idle exit detect time
Bit Error Ratio
LRX-PCB-SKEW 
TRX-DRIFT
400
FTRK
0.2
TEI-ENTRY -
DETECT

TEI-EXIT -DETECT 
BER

max.
1300
65
35
65
900

3.0
Unit Comments
mV
VRX-DIFFp-p = 2×|VRX-D+ -VRX-D-|
Measured as note 2
mV 3, 4, 5, 6
mV 3, 4, 5, 6, 7
mV 4, 5, 6
mV 5
mV 5, 8
5, 9
4.0
0.4
0.3



400
270
45


55
4
6


60
30
10^-12
5, 9
UI 5, 10, 11
UI 5, 10, 11, 12
UI 5, 8
UI 5, 8
ps Given by 20%-80% voltage levels.
Defined as:
VRX-CM = DC (avg) of |VRX-D+
mV + VRX-D-|/2
Measured as note 2.
See also note 13
VRX-CM-AC =
Max |VRX-D+ + VRX-D-|/2 –
mV _{Min |VRX-D+ + VRX-D-|/2}
Measured as note 2
%
14
dB
Measured over 0.1GHz to 2.4GHz.
See also note 15
dB
Measured over 0.1GHz to 2.4GHz.
See also note 15
Ω
16
RRX-Match-DC =
%
2×|RRX-D+ − RRX-D-| / (RRX-D+
+ RRX-D-)
Lane-to-lane PCB skew at the
UI receiver that must be tolerated.
See also note 17
ps 18
MHz 19
ns 20
ns
21
Preliminary Data Sheet E0869E30 (Ver. 3.0)
16