br93lc46-w ROHM Co. Ltd., br93lc46-w Datasheet
br93lc46-w
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br93lc46-w Summary of contents
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W The BR93LC46-W series are CMOS serial input / output-type memory circuits (EEPROMs) that can be programmed electrically. Each is configured of 64 words 16 bits (1,024 bits), and each word can be accessed individually and data read from it and written to it. Operation control is performed using five types of commands. ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs Pin descriptions CS 1 BR93LC46 BR93LC46RF-W BR93LC46RFJ Fig.1 Pin No. BR93LC46-W BR93LC46F-W BR93LC46RF-W BR93LC46FJ-W BR93LC46RFJ-W BR93LC46FV Absolute maximum ratings ( Parameter Applied voltage BR93LC46-W Power BR93LC46F-W / RF-W / FJ-W / RFJ-W dissipation ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs Electrical characteristics For 5V operation (unless otherwise noted Parameter Symbol Input low level voltage Input high level voltage IH V Output low level voltage 1 OL1 Output high level voltage 1 V OH1 ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs Measurement circuits GND Fig.3 "LOW" output voltage circuit CS,SK, Fig.5 Input leak current circuit CS f 1MHz / 250kHz / 200kHz WRITE / READ INPUT DI Fig.7 Supply current circuit ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs (2) Operation timing characteristics For 5V operation (unless otherwise noted Parameter SK clock frequency SK "HIGH" time SK "LOW" time CS "LOW" time CS setup time DI setup time CS hold time DI hold time Data "1" output delay time Data " ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs (3) Timing chart CS t CSS SK t DIS DI DO (READ) DO (WRITE) · Data is acquired from DI in synchronization with the SK rise. · During a reading operation, data is output from DO in synchronization with the SK rise. · During a writing operation, a Status Valid (READY or BUSY) is valid from the time CS is HIGH until time tCS after CS falls following the input of a write command and before the output of the next command start bit. Also, DO must HIGH-Z state when CS is LOW. · ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs (5) Write enable (Fig.11) These ICs are set to the write disabled state by the internal reset circuit when the power is turned on. Therefore, before performing a write command, the write enable command must be executed. When this command is executed, it remains valid until a write disable command is issued or the power supply is cut off ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs (7) All address write (Fig.13) With this command, the input 16 bits data is written simultaneously to all of the addresses (64 words). Rather than writing one word at a time, in succession, data is written all at one time, enabling a write time of t ...
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... Clock (SK) rise conditions If the clock pin (SK) signal of the BR93LC46-W has a long rise time (tr) and if noise on the signal line exceeds a certain level, erroneous operation can occur due to erroneous counts in the clock. To prevent this, a Schmitt trigger is built into the SK input of the BR93LC46-W. The hysteresis amplitude of this circuit is set to approximately 0.2V the noise exceeds the SK input, the noise amplitude should be set to 0 ...
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... Data collision between the -COM output and the DO output Within the input and output timing of the BR93LC46-W the drive from the -COM output to the DI input and a signal output from the DO output can be emitted at the same time. This happens only for the 1 clock cycle (a dummy bit “ ...
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... BR93LC46-W / BR93LC46F-W / BR93LC46RF-W / BR93LC46FJ-W / BR93LC46RFJ-W / BR93LC46FV-W Memory ICs External dimensions (Units : mm) BR93LC46-W 9.3 0 2.54 0.5 0.1 0 ~15 DIP8 BR93LC46FJ-W / RFJ-W 4.9 0 0.45Min. 1.27 0.42 0.1 0.1 SOP-J8 BR93LC46F-W / RF-W 7.62 BR93LC46FV-W 5.0 0 1.27 0.4 0.1 0.3Min. 0.15 SOP8 3.0 0 0.22 0.1 0.3Min. (0.52) 0.65 0.1 SSOP-B8 ...