IC EEPROM 1KBIT 2MHZ 8SSOP

 

BR93L46FV-WE2

Manufacturer Part NumberBR93L46FV-WE2
DescriptionIC EEPROM 1KBIT 2MHZ 8SSOP
ManufacturerRohm Semiconductor
BR93L46FV-WE2 datasheets

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Specifications of BR93L46FV-WE2

Format - MemoryEEPROMs - SerialMemory TypeEEPROM
Memory Size1K (64 x 16)Speed2MHz
InterfaceMicrowire, 3-Wire SerialVoltage - Supply1.8 V ~ 5.5 V
Operating Temperature-40°C ~ 85°CPackage / Case8-SSOP
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesBR93L46FV-WE2
BR93L46FV-WE2TR
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BR93L□□-W Series, 93A□□-WM Series, BR93H□□-WC Series
2) Equivalent circuit
○Output circuit
OEint.
Fig.36 Output circuit (DO)
○Input circuit
RESET int.
CS
Fig.37 Input circuit (CS)
EN
SK
DI
Fig.39 Input circuit (SK, DI)
3) I/O peripheral circuit
3-1) Pull down CS.
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.
○Pull down resistance Rpd of CS pin
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.
Microcontroller
VOHM
“H” output
IOHM
Rpd
Fig.41 CS pull down resistance
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
DO
TEST1
(TEST)
CSint.
LPF
EN
Fig.38 Input circuit (TEST1, TEST)
SK(DI)int.
LPF
Fig.40 Input circuit (TEST2)
Rpd ≧
VOHM ≧ VIHE
EEPROM
Example) When V
VIHE
from the equation ①,
Rpd ≧
“L” input
∴ Rpd ≧ 1.2 [kΩ]
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.
・VIHE
・VOHM
・IOHM
31/40
Technical Note
TESTint.
TEST2
VOHM
・・・①
IOHM
・・・②
=5V, VIHE=2V, VOHM=2.4V, IOHM=2mA,
CC
2.4
-3
2×10
: EEPROM VIH specifications
: Microcontroller VOH specifications
:Microcontroller IOH specifications
2011.02 - Rev.F

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