BR93L46RF-WE2 Rohm Semiconductor, BR93L46RF-WE2 Datasheet - Page 31
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BR93L46RF-WE2
Manufacturer Part Number
BR93L46RF-WE2
Description
IC EEPROM 1KBIT 2MHZ 8SOP
Manufacturer
Rohm Semiconductor
Specifications of BR93L46RF-WE2
Memory Size
1K (64 x 16)
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
2MHz
Interface
Microwire, 3-Wire Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOP
Clock Frequency
2MHz
Supply Voltage Range
1.8V To 5.5V
Memory Case Style
SOP
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Svhc
No SVHC (18-Jun-2010)
Package /
RoHS Compliant
Organization
64 K x 16
Interface Type
Microwire
Maximum Clock Frequency
2 MHz
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
2.5 V, 3.3 V, 5 V
Memory Configuration
64 X 16
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
BR93L46RF-WE2
BR93L46RF-WE2TR
BR93L46RF-WE2TR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BR93L46RF-WE2
Manufacturer:
ROHM
Quantity:
9 385
© 2011 ROHM Co., Ltd. All rights reserved.
BR93L□□-W Series, 93A□□-WM Series, BR93H□□-WC Series
www.rohm.com
2) Equivalent circuit
3) I/O peripheral circuit
○Output circuit
○Input circuit
○Pull down resistance Rpd of CS pin
3-1) Pull down CS.
To prevent mistake in operation and mistake write at power ON/OFF, CS pull down resistance is necessary.
Select an appropriate value to this resistance value from microcontroller VOH, IOH, and VIL characteristics of this IC.
CS
SK
DI
Microcontroller
By making CS=“L” at power ON/OFF, mistake in operation and mistake write are prevented.
Refer to the item 6) Notes at power ON/OFF in page 34/35.
“H” output
Fig.41 CS pull down resistance
VOHM
Fig.37 Input circuit (CS)
Fig.39 Input circuit (SK, DI)
RESET int.
IOHM
EN
Fig.36 Output circuit (DO)
Rpd
OEint.
VIHE
“L” input
EEPROM
LPF
LPF
SK(DI)int.
CSint.
EN
DO
31/40
With the value of Rpd to satisfy the above equation, VOHM becomes
2.4V or higher, and VIHE (=2.0V), the equation ② is also satisfied.
Example) When V
TEST1
(TEST)
∴ Rpd ≧ 1.2 [kΩ]
from the equation ①,
・VIHE
・VOHM
・IOHM
Fig.38 Input circuit (TEST1, TEST)
Fig.40 Input circuit (TEST2)
VOHM ≧ VIHE
Rpd ≧
Rpd ≧
CC
TEST2
=5V, VIHE=2V, VOHM=2.4V, IOHM=2mA,
: EEPROM VIH specifications
: Microcontroller VOH specifications
:Microcontroller IOH specifications
VOHM
IOHM
2×10
2.4
-3
・・・②
・・・①
TESTint.
Technical Note
2011.02 - Rev.F