mpc5645s Freescale Semiconductor, Inc, mpc5645s Datasheet - Page 114

• Manufacturer Part Number: mpc5645s
• Description: Mpc5645s Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical characteristics
The SSTL_2 differential input switch point is at vref = 0.50*vddet.
Note that the JEDEC SSTL_2 specifications (JESD8-9B) for a SSTL interface for class II operation supersedes any
specification in this document.
The SSTL_2 Class II output with ipp_sre[2:0] set to enabling SSTL_2 2.5V DDR1 mode, at the destination, have a rise/fall time
(10%-90%) between 1 ns and 2 ns over process, voltage, and temperature driving a 70 ohm transmission line with 0.167 ns td
terminated at the destination with 70 ohms to Vtt (0.5*vddet) with 4.0 pf, representing the DDR input capacitance.
4.18.5.2
114
vddet
vdd
Vref(dc) P Input Reference Volt-
Vtt
V
V
V
Symbol C
V
V
I
I
Symbol C
oh(dc)
ol(dc)
ih(dc)
il(dc)
ih(ac)
oh
ol
ipp_do
P I/O Supply Voltage
P Core Supply Voltage
P Termination Voltage
C DC Input Logic High
C DC Input Logic Low
C AC Input Logic High
C Output High Voltage
C Output Low Voltage
C Output min source dc
C Output min sink dc
age
Level
Level
current
current
1.8V DDR2
Parameter
Parameter
Table 60. SSTL_2 Class II 2.5V DDR DC Specifications (continued)
Table 61. SSTL_18 Class II 1.8V DDR2 DC Specifications
pad_st/pad_st_odt
Vout=Voh
Vout=Vol
Condition
Condi-
MPC5645S Microcontroller Data Sheet, Rev. 6
tion
Figure 28. SSTL_2 CLass II Test Load
0.833
Vref-0.04
Vref+0.25
1.7
1.08
Vref+0.125
-0.3
vddet-0.35
-16.2
16.2
Min
Min
1.8
1.2
0.9
Vref
PAD
Nom
Nom
Z
1.9
1.32
1.0869
Vref+0.04
vddet+0.3
Vref-0.125
0
0.35
=70 td= 0.167ns
Max
Max
V
V
V
V
V
V
V
Units
Units
mA
mA
V
V
Freescale Semiconductor
Vtt
JESD8-15A
JESD8-15A
JESD8-15A
JESD8-15A
JESD8-15A
JESD8-15A
vddet = 2.3V
vddet = 2.3V
Voh = 1.95V
Vol = 0.35V
Notes
Notes
70 ohms
4pF
SpecID
SpecID
A5.14
A5.15
A5.16
A5.17
A5.18
A5.19
A5.20
A5.10
A5.11
A5.12
A5.13