M93C86-x M93C76-x M93C66-x M93C56-x M93C46-x Datasheet 16-Kbit, 8-Kbit, 4-Kbit, 2-Kbit and 1-Kbit (8-bit or 16-bit wide) MICROWIRE serial access EEPROM Features Industry standard MICROWIRE bus Single supply voltage: 2.5 V to 5.5 V for M93Cx6-W SO8N 1.8 V to 5.5 V for M93Cx6-R (150 mil width) Dual organization: by word (x16) or byte (x8) Programming instructions that work on: byte, word or entire memory Self-timed programming cycle with auto-erase: 5 ms READY/BUSY signal during programming TSSOP8 2 MHz clock rate (169 mil width) Sequential read operation Enhanced ESD/latch-up behavior More than 4 million write cycles More than 200-year data retention Package UFDFPN8 (DFN8) ECOPACK2 (RoHS compliant) and halogen-free packages: (2 x 3 mm) DFN8 SO8N TSSOP8 Product status link M93C46-W M93C56-W M93C56-R M93C66-W M93C66-R M93C76-W M93C76-R M93C86-W M93C86-R DS1077 - Rev 18 - January 2022 www.st.com For further information contact your local STMicroelectronics sales office.M93C86-x M93C76-x M93C66-x M93C56-x M93C46-x Description 1 Description The M93C46 (1 Kbit), M93C56 (2 Kbit), M93C66 (4 Kbit), M93C76 (8 Kbit) and M93C86 (16 Kbit) are electrically erasable programmable memory (EEPROM) devices accessed through the MICROWIRE bus protocol. The memory array can be configured either in bytes (x8b) or in words (x16b). The M93Cx6-W devices operate within a voltage supply range from 2.5 V to 5.5 V and the M93Cx6-R devices operate within a voltage supply range from 1.8 V to 5.5 V. All these devices operate with a clock frequency of 2 MHz (or less), over an ambient temperature range of - 40 C / + 85 C. Table 1. Memory size versus organization Device Number of bits Number of 8-bit bytes Number of 16-bit words M93C86 16384 2048 1024 M93C76 8192 1024 512 M93C66 4096 512 256 M93C56 2048 256 128 M93C46 1024 128 64 Figure 1. Logic diagram VCC D Q C M93Cx6 S ORG VSS MS69281V1 Table 2. Signal names Signal name Function Direction S Chip Select Input D Serial Data input Input Q Serial Data output Output C Serial Clock Input ORG Organization Select Input V Supply voltage - CC V Ground - SS DS1077 - Rev 18 page 2/34