BR25H010-W ROHM [Rohm], BR25H010-W Datasheet - Page 13

• Manufacturer Part Number: BR25H010-W
• Manufacturer: ROHM [Rohm]

○SO load capacity condition
○Other cautions
In order to realize more stable high speed operation, it is recommended to make the values of R
(
Load capacity of SO output pin affects upon delay characteristic of SO output. (Data output delay time, time from HOLDB to
High-Z) In order to make output delay characteristic into higher speed, make SO load capacity small. In concrete, “Do not
connect many devices to SO bus”, “Make the wire between the controller and EEPROM short”, and so forth.
Make the wire length from the microcontroller to EEPROM input signal same length, in order to prevent setup / hold violation
to EEPROM, owing to difference of wire length of each input.
ж
and make the amplitude of signal input to EEPROM close to the amplitude of VCC / GND level.
1 At this moment, operating timing guaranteed value is guaranteed.)
80
70
60
50
40
30
20
0
VIH/VIL=0.8Vcc/0.2Vcc
Vcc=2.5V Ta=25℃
20
Fig.54 SO load dependency of data output delay time
tPD-CL characteristics
40
80
70
60
50
40
30
20
10
0
0
CL[V]
Fig.53 VIL dependency of
60
0.2
80
data output delay time
tPD-VIL characteristics
100
0.4
VIL[V]
120
0.6
13/16
C
Vcc=2.5V
VIH=Vcc
Ta=25 ℃
L
0.8
=100pF
1
EEPROM
SO
PU
, R
PD
CL
as large as possible,