My Inquiry
My Account
Microchip Technology 93C46BT-E/MNY
- Part No.:
- 93C46BT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93C46BT-E/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C46BT-E/MNY from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 4.5–5.5 V supply range, and industrial-temperature operation (−40°C to +85°C). It features self-timed erase/write cycles, automatic erase-all-before-write-all (ERAL/WRAL), power-on/off data protection, and Ready/Busy status signaling via DO pin - used in embedded system configuration storage and calibration data retention.
For engineers reviewing the 93C46BT-E/MNY datasheet, 93C46BT-E/MNY pinout, 93C46BT-E/MNY application, or 93C46BT-E/MNY equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), TSSOP-8 package, 2 ms write cycle time, 1 million endurance cycles, and compatibility with legacy Microwire controllers in space-constrained industrial control modules.
Technical Context
The 93C46BT-E/MNY implements a synchronous serial interface with CS, CLK, and DI/DO pins operating at up to 3 MHz (VCC ≥ 4.5 V). It uses a dedicated 8-bit memory map (128 × 8) without ORG pin functionality - distinguishing it from C-variant devices - and relies on external logic for instruction sequencing and status polling.
Its internal architecture includes an address decoder, data register, mode decode logic, and output buffer, enabling sequential read, single-byte write, ERASE, ERAL, WRAL, EWEN/EWDS commands. Power-on reset circuitry disables writes until explicit EWEN command execution, ensuring robust data integrity during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization; no ORG pin - fixed x8 mode) |
| VCC range | 4.5 V to 5.5 V - requires stable regulated supply; not functional below 4.5 V |
| Write cycle time | 2 ms - self-timed; no external timing control needed for erase/write operations |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C, VCC = 5.0 V |
| Data retention | 200 years - guaranteed minimum nonvolatile data hold at rated temperature |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - no SPI or I²C protocol support |
| Temperature range | −40°C to +85°C (Industrial grade) - qualified per Microchip's I-temp specification |
Pinout & Package
93C46BT-E/MNY is housed in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, lead-free Matte Tin finish, and pin 1 marked by laser dot. The package supports surface-mount reflow assembly and meets RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge (for 93C variants) |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stopped clock allowed mid-sequence |
| 3 (DI) | Data Input | Accepts Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference for all digital and analog functions; must be low-impedance connection |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (ORG) | Organization | No internal connection on 93C46B/T - unused; not bonded in this variant |
| 8 (VCC) | Power Supply | 4.5–5.5 V only; voltage detect threshold is 3.8 V - device inhibits all operations below this level |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing circuitry or software delays - hardware-managed 2 ms cycle completes autonomously |
| Automatic ERAL before WRAL | Ensures full array is erased prior to bulk write, preventing partial-data corruption without host intervention |
| Power-on/off data protection | Hardware lockout below 3.8 V VCC prevents inadvertent writes during power ramp-up/down sequences |
| Ready/Busy status on DO | Enables efficient polling-based firmware flow control without requiring interrupt lines or additional GPIO |
| 128 × 8-bit fixed organization | Simplifies host driver design - no runtime ORG pin configuration or dual-word-size handling required |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed infrequently during commissioning or maintenance; supports sequential reads and occasional byte writes. Use Value: 200-year data retention ensures parameter integrity across equipment lifetime without battery backup or refresh routines. | Use Scenario: Retaining sensor calibration coefficients and usage logs in portable diagnostic instruments subject to periodic firmware updates. IC Role / Device Role / Timing Role: Dedicated calibration memory interfaced directly to microcontroller's Microwire peripheral; accessed during boot and service mode. Use Value: 1M endurance enables field recalibration over thousands of service cycles without wear-out concerns. |
| Automotive Body Control Module Settings | Smart Energy Meter Tariff Tables |
Use Scenario: Holding user-configurable lighting profiles, window position memories, and door lock behavior in automotive BCMs operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Low-power serial EEPROM sharing bus with other peripherals; accessed via polled Microwire interface during initialization. Use Value: Industrial-grade temperature rating and 4.5–5.5 V operation match automotive 5 V rail tolerances without level-shifting. | Use Scenario: Storing time-of-use tariff schedules and billing history in utility meters where firmware updates occur annually. IC Role / Device Role / Timing Role: Standalone configuration memory with minimal MCU resource usage - no DMA or dedicated SPI port required. Use Value: Microwire compatibility allows reuse of legacy meter controller firmware with no protocol stack changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C46B-I/SN | Same 128 × 8-bit organization and 4.5–5.5 V range, but in SOIC-8 package (5.3 mm × 4.4 mm vs. TSSOP-8's 3.0 mm × 4.4 mm) | Requires PCB layout change due to larger footprint and different thermal profile; suitable for through-hole prototyping or legacy board rework | Select if SOIC hand-soldering or existing SOIC footprints are preferred; same timing and command set |
| 93LC46B-I/SN | 2.5–5.5 V supply range, same 8-bit organization, SOIC-8 package; lacks 93C46BT-E/MNY's 4.5–5.5 V optimization and higher noise immunity | Better suited for mixed-voltage systems with 3.3 V logic; not recommended for pure 5 V industrial rails where tighter VCC tolerance improves reliability | Choose when system operates at 2.5–3.3 V or requires wider supply flexibility; verify VCC stability margins |
Compared with 93C46B-I/SN and 93LC46B-I/SN, the 93C46BT-E/MNY offers optimized performance in narrow 4.5–5.5 V industrial 5 V rails, smallest footprint among equivalents (TSSOP-8), and highest noise immunity due to elevated VCC threshold - making it ideal for dense, thermally constrained control modules.
Availability
93C46BT-E/MNY is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, and automotive body control module settings requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93C46BT-E/MNY 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 solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx series was designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable nonvolatile storage with minimal external components and compatibility with legacy Microwire controllers.
FAQ
What is the memory organization of the 93C46BT-E/MNY?
The 93C46BT-E/MNY has a fixed 128 × 8-bit organization. Unlike C-variant parts, it does not use the ORG pin - the 'B' suffix indicates dedicated 8-bit communication, and the 'T' denotes TSSOP-8 packaging. This eliminates configuration ambiguity and simplifies host firmware development compared to word-selectable versions.
Does the 93C46BT-E/MNY require an external pull-up resistor on the DO line?
No, the 93C46BT-E/MNY does not require an external pull-up on DO. The DO pin actively drives high/low during read or Ready/Busy status reporting and enters High-Z when deselected (CS low) or idle. A pull-up may cause bus contention if DI and DO are shorted - Microchip recommends a series resistor if shared-line topology is used.
Can the 93C46BT-E/MNY operate at 3.3 V?
No, the 93C46BT-E/MNY cannot operate at 3.3 V. Its specified VCC range is strictly 4.5 V to 5.5 V. Below 4.5 V, the internal voltage detector (VPOR = 3.8 V typical) inhibits all programming operations, and DC/AC parameters are not guaranteed. For 3.3 V systems, consider the 93LC46B-I/SN instead.
How is the Ready/Busy status checked on the 93C46BT-E/MNY?
The Ready/Busy status is read from the DO pin: DO = low indicates ongoing erase/write operation; DO = high means completion. To poll, bring CS high after ≥250 ns low time (TCSL), then sample DO on the next CLK rising edge. After completion, issue a Start bit and lower CS to clear the status flag.
Is the 93C46BT-E/MNY pin-compatible with the 93C46A-I/PDIP?
No, the 93C46BT-E/MNY (TSSOP-8) is not pin-compatible with the 93C46A-I/PDIP (PDIP-8), despite identical pin functions. Pin 1 (CS) to pin 8 (VCC) assignments match, but physical dimensions, lead pitch (0.65 mm vs. 2.54 mm), and thermal characteristics differ significantly - requiring PCB redesign and requalification for mechanical and thermal performance.
93C46BT-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93C46BT-E/MNY FAQ
1.How can I place an order for 93C46BT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C46BT-E/MNY 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 93C46BT-E/MNY reliable?
The price and inventory of 93C46BT-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C46BT-E/MNY is usually 5 days.
3.What payment methods are accepted for 93C46BT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C46BT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C46BT-E/MNY?
93C46BT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C46BT-E/MNY 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 93C46BT-E/MNY?
For technical support, including 93C46BT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C46BT-E/MNY requirements.
6.How does Aetrix verify that 93C46BT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93C46BT-E/MNY 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 93C46BT-E/MNY meets industry standards.
7.What is the process for return or replacement of 93C46BT-E/MNY?
All 93C46BT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93C46BT-E/MNY, 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 93C46BT-E/MNY part is unused and in its original packaging.
Return procedure for 93C46BT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C46BT-E/MNY 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…
