M24256-BHR STMICROELECTRONICS [STMicroelectronics], M24256-BHR Datasheet
M24256-BHR
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M24256-BHR Summary of contents
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... M24256-BW M24256-BR M24256-BHR Features 2 ■ Two-wire I C serial interface supports the 1 MHz protocol ■ Supply voltage ranges: – 1 5.5 V (M24xxx-R) – 2 5.5 V (M24xxx-W) ■ Write Control input ■ Byte and Page Write ■ Random and sequential read modes ■ Self-timed programming cycle ■ ...
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... ECC (error correction code) and write cycling . . . . . . . . . . . . . . . . . . . . . 16 3.10 Minimizing system delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . . 17 3.11 Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.12 Random Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.13 Current Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.14 Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.15 Acknowledge in Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4 Initial delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2/ Operating supply voltage Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Power-down conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 M24512-x, M24256-Bx ...
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... M24512-x, M24256-Bx 5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Contents 3/35 ...
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... SO8N – 8-lead plastic small outline, 150 mils body width, package mechanical data . . . . 28 Table 17. TSSOP8 – 8-lead thin shrink small outline, package mechanical data Table 18. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 19. Available M24256-Bx products (package, voltage range, temperature grade Table 20. Available M24512-x products (package, voltage range, temperature grade Table 21. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4/35 ...
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... M24512-x, M24256-Bx List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. SO and TSSOP connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3. Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4. M24xxx-R and M24xxx-W – Maximum R capacitance (C bus Figure 5. M24xxx-HR – Maximum for bus at maximum frequency f bus 2 Figure bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 7. Write mode sequences with (data write inhibited Figure 8 ...
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... Description 1 Description The M24512-W, M24512-R, M24512-HR, M24256-BW, M24256-BR and M24256-BHR 2 devices are I C-compatible electrically erasable programmable memories (EEPROM). They are organized × 8 bits and 32 Kb × 8 bits, respectively uses a two-wire serial interface, comprising a bidirectional data line and a clock line. The devices carry a built-in 4-bit Device Type Identifier code (1010) in accordance with the I bus definition ...
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... M24512-x, M24256-Bx Figure 2. SO and TSSOP connections 1. See Package mechanical data SCL SDA section for package dimensions, and how to identify pin-1. Description AI04035e 7/35 ...
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... When Write Control (WC) is driven High, Device Select and Address bytes are acknowledged, Data bytes are not acknowledged. 8/35 indicates how the value of the pull-up resistor can be calculated M24xxx M24xxx M24512-x, M24256-Bx . (Figure 5. indicates how CC Ai12806 , and IL CC ...
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... M24512-x, M24256-Bx 2.5 V ground the reference for the V SS 2.6 Supply voltage (V 2.6.1 Operating supply voltage V Prior to selecting the memory and issuing instructions to it, a valid and stable V within the specified [V In order to secure a stable DC supply voltage recommended to decouple the V with a suitable capacitor (usually of the order 100 nF) close to the V package pins ...
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... C bus at maximum frequency f f time constant R must be less than 150 ns f where t time constant R must be less than 270 ns 100 M24512-x, M24256-Bx value versus bus parasitic bus = 400 kHz 400 kHz, t LOW = 1.3 µs Rbus x Cbus time constant must be less than 500 ns SCL I² ...
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... M24512-x, M24256-Bx 2 Figure bus protocol SCL SDA SCL SDA Start condition SCL SDA Table 2. Device select code Device select code 1. The most significant bit, b7, is sent first. 2. E0, E1 and E2 are compared against the respective external pins on the memory device. Table 3. ...
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... The device that controls the data transfer is known as the bus master, and the other as the slave device. A data transfer can only be initiated by the bus master, which will also provide the serial clock for synchronization. The M24512-W, M24512-R, M24512-HR, M24256-BW, M24256-BR and M24256-BHR devices are always slaves in all communications. 3.1 ...
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... M24512-x, M24256-Bx 3.5 Memory addressing To start communication between the bus master and the slave device, the bus master must initiate a Start condition. Following this, the bus master sends the device select code, shown in Table 2. (on Serial Data (SDA), most significant bit first). ...
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... Write mode sequences with (data write inhibited) WC Byte Write WC Page Write WC (cont'd) Page Write (cont'd) 14/35 ACK ACK Dev sel Byte addr Byte addr R/W ACK ACK Dev sel Byte addr Byte addr R/W NO ACK NO ACK Data in N M24512-x, M24256-Bx ACK NO ACK Data in ACK NO ACK Data in 1 Data in 2 AI01120d ...
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... This should be avoided, as data starts to become overwritten in an implementation dependent way. The bus master sends from bytes (for the M24256-Bx) or from 1 to 128 bytes (for the M24512-x) of data, each of which is acknowledged by the device if Write Control (WC) is Low ...
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... Write Mode sequences with (data write enabled) WC Byte Write WC Page Write WC (cont'd) Page Write (cont'd) 16/35 ACK ACK Dev sel Byte addr Byte addr R/W ACK ACK Dev sel Byte addr Byte addr R/W ACK ACK Data in N M24512-x, M24256-Bx ACK ACK Data in ACK ACK Data in 1 Data in 2 AI01106d ...
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... M24512-x, M24256-Bx Figure 9. Write cycle polling flowchart using ACK First byte of instruction with already decoded by the device 3.10 Minimizing system delays by polling on ACK During the internal Write cycle, the device disconnects itself from the bus, and writes a copy of the data from its internal latches to the memory cells. The maximum Write time (t ...
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... The output data comes from consecutive addresses, with the internal address counter automatically incremented after each byte output. After the last memory address, the address counter ‘rolls-over’, and the device continues to output data from memory address 00h. 18/35 Figure 10. M24512-x, M24256-Bx ...
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... M24512-x, M24256-Bx Figure 10. Read mode sequences Current Address Read Random Address Read Sequential Current Read Sequential Random Read 1. The seven most significant bits of the device select code of a Random Read (in the 1 be identical. 3.15 Acknowledge in Read mode For all Read commands, the device waits, after each byte read, for an acknowledgment ...
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... European directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) 2002/95/EC. 2. AEC-Q100-002 (compliant with JEDEC Std JESD22-A114 100 pF 1500 , R2 = 500 ) 20/35 Table 6 may cause permanent damage to Parameter (2) M24512-x, M24256-Bx Min. Max. Unit –40 130 °C –65 150 ° ...
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... M24512-x, M24256- and AC parameters This section summarizes the operating and measurement conditions, and the dc and ac characteristics of the device. The parameters in the DC and AC characteristic tables that follow are derived from tests performed under the measurement conditions summarized in the relevant tables. Designers should check that the operating conditions in their circuit match the measurement conditions when relying on the quoted parameters ...
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... 2 2 2.1 mA M24512-x, M24256-Bx Min. Max 500 CC Table 7 and Min. Max. 9) ± 2 ± 2 < 5 Device grade 3 Device grade –0.45 0.3V 0. 2.5 V 0.4 Unit ...
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... M24512-x, M24256-Bx Table 12. DC characteristics (M24xxx-R and M24xxx-HR) Symbol Parameter Input leakage current I LI (E1, E2, SCL, SDA) I Output leakage current LO I Supply current (Read Supply current (Write) CC0 I Standby supply current CC1 Input low voltage V IL (SCL, SDA, WC) Input high voltage ...
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... Start condition set up time Start condition hold time Stop condition set up time Time between Stop condition and next Start condition Write time Pulse width ignored (input filter on SCL and SDA) - single glitch M24512-x, M24256-Bx Table 7, Table 8 and Min. Max. Unit 400 ...
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... M24512-x, M24256-Bx Table 14. 1 MHz AC characteristics (M24xxx-HR, see Symbol Alt SCL t t CHCL HIGH t t CLCH LOW ( XH1XH2 R ( XL1XL2 F ( DL1DL2 DXCX SU:DAT t t CLDX HD:DAT t t CLQX DH (3)( CLQV AA ( CHDX SU:STA t t DLCL ...
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... Start condition SCL SDA In tCHDH Stop condition tCHCL SCL tCLQV SDA Out 26/35 tCHCL tCLCH tXL1XL2 tCLDX tDXCX SDA Change SDA Input tW Write cycle tCLQX Data valid Data valid M24512-x, M24256-Bx tCHDH tDHDL Start Stop condition condition tCHDX Start condition tDL1DL2 AI00795e ...
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... M24512-x, M24256-Bx 7 Package mechanical data In order to meet environmental requirements, ST offers the M24512-W in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label ...
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... millimeters Typ Min Max 1.75 0.1 0.25 1.25 0.28 0.48 0.17 0.23 0.1 4.9 4 5.8 6.2 3.9 3 0.25 0.5 0° 8° 0.4 1.27 1.04 M24512-x, M24256- 45˚ c 0.25 mm GAUGE PLANE SO-A (1) inches Typ Min 0.0039 0.0492 0.011 0.0067 0.1929 0.189 0.2362 0.2283 0.1535 0.1496 0.05 - 0.0098 0° 0.0157 0.0409 Max 0.0689 0.0098 0.0189 0.0091 0.0039 ...
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... M24512-x, M24256-Bx Figure 15. TSSOP8 – 8-lead thin shrink small outline, package outline Drawing is not to scale. Table 17. TSSOP8 – 8-lead thin shrink small outline, package mechanical data Symbol Values in inches are converted from mm and rounded to 4 decimal digits. ...
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... Please ask your nearest ST sales office for a copy. 2. Used only for device grade 3. For a list of available options (speed, package, etc.) or for further information on any aspect of this device, please contact your nearest ST sales office. 30/35 M24512-x, M24256-Bx M24512– (1) P /AB ...
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... Available M24512-x products (package, voltage range, temperature grade) Package SO8N (MN) SO8W (MW) TSSOP (DW) M24256-BW M24256-BR 2 5 5.5 V Range 6, Range 3 Range 6 Range 6 - Range 6 Range 6 M24512-W M24512-R 2 5 5.5 V Range 6, Range 3 Range 6 Range 6 - Range 6 Range 6 Part numbering M24256-BHR 1 5.5 V Range 6 - Range 6 M24512-HR 1 5.5 V Range 31/35 ...
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... Ordering information scheme. Resistance and capacitance renamed in <Blue>Figure 5., M24xxx-HR – Maximum R value versus bus parasitic capacitance (C bus bus at maximum frequency f M24512-x, M24256-Bx Changes (min) improved to –0.45V. IL section and <Blue>Table 18., Ordering = 5.5V added to <Blue>Table 11., DC ...
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... Table 11: DC characteristics (M24xxx-W) 7 characteristics (M24xxx-R and M24xxx-HR) Note 1 removed from Table 11: DC characteristics SO8W package specifications modified in data. Table 19: Available M24256-Bx products (package, voltage range, temperature grade) and Table 20: Available M24512-x products (package, voltage range, temperature grade) Section 2.5: V ground added. Small text changes. ...
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... Table 10 NS Table 11. Table 12: DC characteristics (M24xxx-R and M24xxx-HR) MHz AC characteristics (M24xxx-HR, see Table 8 and Table 9) Small text changes. Small text changes. M24256-BHR root part number added. Section 2.6.3: Device reset on page 9 Figure 5: M24xxx-HR – Maximum R 10 capacitance (C ) for an I bus page 10 updated ...
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... M24512-x, M24256-Bx Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...