My Inquiry
My Account
Microchip Technology 24LC08BH-I/ST
- Part No.:
- 24LC08BH-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BH-I/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,240
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC08BH-I/ST from Microchip Technology Inc. is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit memory blocks, operating from 2.5V to 5.5V with industrial temperature range (−40°C to +85°C), 400 kHz max clock frequency, and hardware write-protect for addresses 200h–3FFh. It supports page writes of up to 16 bytes and delivers ≤1 mA read current and ≤1 µA standby current in TSSOP-8 packaging.
For engineers reviewing the 24LC08BH-I/ST datasheet, 24LC08BH-I/ST pinout, 24LC08BH-I/ST application, or 24LC08BH-I/ST equivalent, key selection criteria include VCC min (2.5V), half-array write-protection via WP pin, I²C timing compliance at 400 kHz, and TSSOP-8 footprint compatibility with legacy 24LC08B designs.
Technical Context
The 24LC08BH-I/ST implements a slave-only I²C interface with fixed 4-bit device code '1010', block-select addressing (B2–B0) for selecting one of four 256-word memory blocks, and Schmitt-triggered SDA/SCL inputs for noise immunity. Its internal address pointer auto-increments during sequential reads and wraps on page boundaries during page writes.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to memory addresses 200h–3FFh while permitting full read access; tied to VSS, full read/write operation is enabled. The device uses self-timed erase/write cycles with typical 3 ms page write time and includes VCC threshold detection to inhibit writes below 1.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (four 256 × 8-bit blocks), enabling compact nonvolatile storage for configuration, calibration, or boot data. |
| VCC operating range | 2.5V to 5.5V - requires no level-shifting when interfacing with 3.3V or 5V microcontrollers. |
| Max I²C clock | 400 kHz - supports high-speed communication without compromising timing margins in noise-prone environments. |
| Page write buffer | 16-byte - reduces bus transactions by up to 16× versus byte-write mode, improving firmware update efficiency. |
| Endurance | 1 million erase/write cycles - suitable for applications requiring frequent parameter logging or field-updatable settings. |
| Data retention | 200 years - ensures long-term reliability in unpowered storage for medical, industrial, or infrastructure equipment. |
| Write-protect scope | Half-array (200h–3FFh) - allows safe storage of factory-calibrated values while permitting user-modifiable parameters in lower 512 bytes. |
Pinout & Package
24LC08BH-I/ST is supplied in an 8-lead TSSOP package (4.4 mm body width), RoHS-compliant, with standard 0.65 mm lead pitch and exposed pad not connected. Pin 1 is A0 (NC), Pin 2 is A1 (NC), Pin 3 is A2 (NC), Pin 4 is VSS (ground reference), Pin 5 is SDA (bidirectional open-drain I²C data line), Pin 6 is SCL (input-only I²C clock), Pin 7 is WP (active-high write-protect control), and Pin 8 is VCC (power supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact. |
| VSS | Ground reference | Must be connected to system ground plane; serves as return path for SDA pull-up current and internal logic. |
| SDA | I²C bidirectional data line | Open-drain output requiring external pull-up (2 kΩ for 400 kHz); changes only during SCL low to avoid false Start/Stop generation. |
| SCL | I²C clock input | Driven solely by master; synchronizes all address/data transfers and ACK timing. |
| WP | Hardware write-protect enable | Pulled high to VCC to lock addresses 200h–3FFh; pulled low to VSS for full read/write access. |
| VCC | Power supply | Supplies internal logic and EEPROM array; must remain stable ≥2.5V during write cycles to prevent corruption. |
Key Features
| Feature | Design Value |
|---|---|
| 2-wire I²C interface | Fully compatible with standard I²C protocol including Start/Stop, ACK polling, and 7-bit addressing with block-select extension. |
| Schmitt-trigger inputs | Provides 50 mV hysteresis on SDA/SCL to reject noise spikes up to 50 ns, eliminating need for external filtering in EMI-heavy environments. |
| Output slope control | Controls SDA rise/fall times to suppress ground bounce during switching, preventing false logic transitions in shared-ground systems. |
| Self-timed write cycle | Automatically manages internal programming timing; eliminates need for host MCU to track variable write durations across voltage/temperature. |
| ESD protection | Exceeds 4 kV HBM - enables robust handling in manufacturing and field-replaceable modules without additional transient protection. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and linearization tables in programmable pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile storage element holding calibration data accessed at power-on reset before analog signal conditioning begins. Use Value: Enables single-pass calibration during production and preserves accuracy over 200-year data retention without battery backup. | Use Scenario: Saving user-selected therapy parameters (e.g., infusion rate, alarm thresholds) in portable insulin pumps or dialysis controllers. IC Role / Device Role / Timing Role: Secure configuration store with WP pin hardwired to VCC to prevent accidental overwrite of safety-critical default settings in 200h–3FFh region. Use Value: Guarantees immutable baseline values while allowing field updates to user-modifiable fields in lower 512 bytes. |
| Consumer Electronics Firmware Patching | Automotive Body Control Module Settings |
Use Scenario: Hosting small firmware patches or UI language packs in smart home hubs, updated via cloud-initiated I²C writes. IC Role / Device Role / Timing Role: Secondary code storage accessed only during OTA update sequences; isolated from main flash to avoid bricking on partial writes. Use Value: 16-byte page writes reduce update time by >90% vs. byte-wise writes, minimizing bus occupancy during critical system maintenance windows. | Use Scenario: Retaining seat/mirror position presets and lighting profiles across ignition cycles in automotive door modules. IC Role / Device Role / Timing Role: Low-power persistent memory powered directly from always-on 5V rail; accessed during wake-up sequence before CAN initialization. Use Value: 1 µA standby current extends battery drain interval beyond 10 years in sleep mode, meeting OEM quiescent current requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC08B-I/ST | Same pinout and function but lacks half-array write-protect; WP pin disabled (no internal connection). | Not suitable where factory calibration data must be permanently locked against field modification. | Select 24LC08B-I/ST only if full memory writability is required and no hardware-level protection is needed. |
| AT24C08D-SSHM-T | 8 Kbit I²C EEPROM with identical 2.5–5.5V VCC range and TSSOP-8 package, but supports 1 MHz clock and offers software write-protect instead of hardware WP pin. | Requires firmware-level lock management; incompatible with hardware-only protection schemes relying on WP pin state. | Choose AT24C08D-SSHM-T when higher-speed communication or flexible software-controlled protection is prioritized over deterministic hardware lock. |
Compared with 24LC08B-I/ST, the 24LC08BH-I/ST adds deterministic hardware write-protect for half the array-critical for safety-critical calibration storage-while AT24C08D-SSHM-T trades that hardware feature for faster 1 MHz I²C support and software-configurable protection, increasing firmware complexity but offering greater flexibility.
Availability
24LC08BH-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, consumer electronics firmware patching, and automotive body control module settings requiring stable component supply across extended product lifecycles.
Supply support for 24LC08BH-I/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and memory products, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 24LC08BH belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in space-constrained industrial, medical, and automotive applications.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC08BH-I/ST?
The 24LC08BH-I/ST requires a minimum VCC of 2.5V for guaranteed operation across its full temperature range (−40°C to +85°C). Operation below 2.5V is not specified and may result in failed write cycles or corrupted data, as confirmed in the Device Selection Table and Electrical Characteristics section of DS20002084B. The 24LC08BH-I/ST does not support the 1.7V operation available in the 24AA08H variant.
How does the WP pin function on the 24LC08BH-I/ST, and what memory region does it protect?
On the 24LC08BH-I/ST, the WP pin is an active-high hardware write-protect input: when tied to VCC, it disables write access to memory addresses 200h–3FFh (the upper half of the 8 Kbit array), while permitting full read access and unrestricted writes to addresses 000h–1FFh. This protection is implemented entirely in hardware and remains effective regardless of I²C command sequence. The 24LC08BH-I/ST relies on this pin for deterministic, tamper-resistant storage of factory calibration data.
Can the 24LC08BH-I/ST be used interchangeably with the 24LC08B-I/ST on the same PCB layout?
Yes, the 24LC08BH-I/ST is pin-compatible and footprint-compatible with the 24LC08B-I/ST in TSSOP-8 packaging, sharing identical pin assignments and electrical characteristics except for the WP pin functionality. However, the 24LC08B-I/ST has no internal WP circuitry-the WP pin is unconnected-so tying it high will have no effect. To retain write-protect capability, the PCB must route WP to a controllable voltage source; otherwise, the 24LC08BH-I/ST's protection feature remains unused.
What is the maximum supported I²C clock frequency for the 24LC08BH-I/ST, and under what conditions?
The 24LC08BH-I/ST supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V, as specified in the Device Selection Table and AC Characteristics (Table 1-2). At VCC < 2.5V, operation is not guaranteed; the device is not rated for 100 kHz at reduced voltage like the 24AA08H. All timing parameters-including THIGH, TLOW, and TSU:DAT-are validated only within the 2.5–5.5V range for the 24LC08BH-I/ST.
Does the 24LC08BH-I/ST support page write operations, and what is the buffer size?
Yes, the 24LC08BH-I/ST supports page write operations with a 16-byte page buffer, allowing up to 16 data bytes to be loaded into the on-chip buffer before initiating the internal write cycle upon receipt of a Stop condition. Page writes are constrained to a single physical page boundary (i.e., addresses aligned to 0h, 10h, 20h, etc.), and crossing a boundary causes wraparound within the current page. This capability is confirmed in the Functional Description and Write Operation sections of DS20002084B.
24LC08BH-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 256 x 8 x 4
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC08BH-I/ST FAQ
1.How can I place an order for 24LC08BH-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BH-I/ST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 24LC08BH-I/ST reliable?
The price and inventory of 24LC08BH-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC08BH-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BH-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BH-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BH-I/ST?
24LC08BH-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BH-I/ST order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 24LC08BH-I/ST?
For technical support, including 24LC08BH-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BH-I/ST requirements.
6.How does Aetrix verify that 24LC08BH-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BH-I/ST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24LC08BH-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BH-I/ST?
All 24LC08BH-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BH-I/ST, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 24LC08BH-I/ST part is unused and in its original packaging.
Return procedure for 24LC08BH-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BH-I/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
