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BR25H040-WE2 Datasheet(PDF) 3 Page - Rohm |
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BR25H040-WE2 Datasheet(HTML) 3 Page - Rohm |
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3 / 17 page  3/16 ● Pin assignment and description Terminal name Input/Output Function Vcc – Power source to be connected GND – All input / output reference voltage, 0V CSB Input Chip select input SCK Input Serial clock input SI Input Start bit, ope code, address, and serial data input SO Output Serial data output HOLDB Input Hold input Command communications may be suspended temporarily (HOLD status) WPB Input Write protect input Write command is prohibited *1 Write status register command is prohibited. *1:BR25H010/020/040-W ● Operating timing characteristics (Ta=-40~+125°C, unless otherwise specified, load capacity CL1=100pF) 2.5≤Vcc≤5.5V Parameter Symbol Min. Typ. Max Unit SCK frequency fSCK – – 5 MHz SCK high time tSCKWH 85 – – ns SCK low time tSCKWL 85 – – ns CSB high time tCS 85 – – ns CSB setup time tCSS 90 – – ns CSB hold time tCSH 85 – – ns SCK setup time tSCKS 90 – – ns SCK hold time tSCKH 90 – – ns SI setup time tDIS 20 – – ns SI hold time tDIH 30 – – ns Data output delay time1 tPD1 – – 70 ns Data output delay time1 (CL2=30pF) tPD2 – – 55 ns Output hold time tOH 0 – – ns Output disable time tOZ – – 100 ns HOLDB setting setup time tHFS 0 – – ns HOLDB setting hold time tHFH 40 – – ns HOLDB release setup time tHRS 0 – – ns HOLDB release hold time tHRH 70 – – ns Time from HOLDB to output High-Z tHOZ – – 100 ns Time from HOLDB To output change tHPD – – 70 ns SCK rise time tRC – – 1 μs SCK fall time tFC – – 1 μs OUTPUT rise time tRO – – 50 ns OUTPUT fall time tFO – – 50 ns Write time tE/W – – 5 ms Ж1 NOT 100% TESTED ● Sync data input / output timing SI is taken into IC inside in sync with data rise edge of SCK. Input address and data from the most significant bit MSB. SO is output in sync with data fall edge of SCK. Data is output from the most significant bit MSB. ● AC measurement conditions Limits Parameter Symbol Min. Typ. Max Unit Load capacity 1 CL1 – – 100 pF Load capacity 2 CL2 – – 30 pF Input rise time – – – 50 ns Input fall time – – – 50 ns Input voltage – 0.2Vcc/0.8Vcc V Input / Output judgment voltage – 0.3Vcc/0.7Vcc V Vcc HOLDB SCK SI CSB SO WPB GND BR25H010-W BR25H020-W BR25H040-W BR25H080-W BR25H160-W BR25H320-W Fig.2 Pin assignment diagram Fig.3 Input timing Fig.4 Input / Output timing Fig.5 HOLD timing CSB SCK SI SO tPD tOH tRO,tFO tOZ tCSH tSCKH tCS High-Z CSB SCK SI SO tCS tCSS tSCKS tSCKWL tSCKWH tDIS tDIH tRC tFC High-Z CSB SCK SI n+1 "H" "L" n Dn n-1 Dn Dn-1 HOLDB SO Dn+1 tHFS tHFH tHOZ tHRS tHRH tDIS tHPD High-Z Ж1 Ж1 Ж1 Ж1 |
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