My Inquiry
My Account
Microchip Technology 93C46C-E/SN
- Part No.:
- 93C46C-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C46C-E/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,067
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C46C-E/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8 or 64 × 16) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, ORG pin for runtime word-size selection, and industrial/automotive temperature support (−40°C to +125°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, Ready/Busy status via DO pin, and 1,000,000 endurance cycles - used in microcontroller configuration storage and power-management parameter retention.
For engineers reviewing the 93C46C-E/SN datasheet, 93C46C-E/SN pinout, 93C46C-E/SN application, or 93C46C-E/SN equivalent, key selection criteria include VCC range (4.5–5.5 V), ORG-configurable x8/x16 organization, TSSOP-8 package compatibility, automotive-grade reliability, and Microwire protocol timing compliance per DS20001749K.
Technical Context
The 93C46C-E/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution is triggered by rising CLK edges and controlled by CS state transitions. Its dual-organization memory array (x8 or x16) is selected dynamically via the ORG pin voltage level - tied to VCC for 16-bit mode or VSS for 8-bit mode.
It supports full-cycle operations including READ (18 or 25 clocks), WRITE (18 or 25 clocks), ERASE (10 or 9 clocks), ERAL (10 or 9 clocks), and WRAL (18 or 25 clocks), all initiated by CS falling edge (93AA/93LC) or CLK rising edge (93C series). Power-on data protection activates below 3.8 V, and EWEN/EWDS commands enforce write-lock security.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit or 64 × 16-bit, selectable via ORG pin) |
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with 5 V logic systems and rejects brown-out corruption |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Write Cycle Time | 2 ms max - enables fast firmware updates without blocking host MCU execution |
| Endurance | 1,000,000 erase/write cycles - supports frequent calibration or logging in automotive ECUs |
| Data Retention | 200 years at +85°C - guarantees long-term parameter integrity across product lifecycle |
| Temperature Range | −40°C to +125°C (Automotive E-grade) - qualified for under-hood and ADAS module deployment |
Pinout & Package
93C46C-E/SN is packaged in an 8-lead TSSOP (SN) with 3.0 mm × 4.4 mm body, Pb-free Matte Tin finish, and standard JEDEC footprint. Pin 1 is marked by laser dot; exposed pad is not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Rising-edge synchronized I/O; clocking stops during self-timed write cycles |
| DI | Data Input | Accepts Start bit, opcode, address, and data; requires external pull-down on CS per datasheet guidance |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS goes low |
| VSS | Ground | Reference for all digital and analog functions; decoupling capacitor required near pin |
| ORG | Organization Control | Logic high → 64×16 mode; logic low → 128×8 mode; must be externally biased, not floating |
| NC | No Internal Connection | Pin 7 is unconnected; no PCB trace or component required |
| VCC | Power Supply | 4.5–5.5 V only; internal POR triggers at 3.8 V - prevents writes during power ramp |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin configurable memory organization | Enables single BOM for both 8-bit and 16-bit host interfaces without firmware change |
| Self-timed erase/write with auto-erase | Eliminates need for external timing control or polling delay loops in host firmware |
| ERAL before WRAL sequence | Guarantees full-array erase prior to bulk write - prevents partial-data corruption on power loss |
| Ready/Busy status on DO pin | Allows real-time polling instead of fixed delays - reduces worst-case write latency by up to 40% |
| EWEN/EWDS write-protection commands | Prevents accidental overwrites during interrupt service or brown-out recovery sequences |
| Power-on/off data protection | Hardware-enforced lockout below 3.8 V - no software initialization required for safe power cycling |
Applications
| Engine Control Unit (ECU) Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing fuel map coefficients, sensor offsets, and adaptive learning values subject to field updates. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via MCU's Microwire peripheral during boot and runtime reconfiguration. Use Value: 1M endurance and 200-year retention ensure calibration integrity across 15+ year vehicle lifetimes without refresh. |
Use Scenario: Holding I/O mapping tables, alarm thresholds, and communication protocol settings in factory automation controllers. IC Role / Device Role / Timing Role: Serial configuration store interfaced to ARM Cortex-M3/M4 via GPIO-banged Microwire. Use Value: ORG pin allows same hardware design to support legacy 8-bit or modern 16-bit data path architectures. |
| Automotive Body Control Module (BCM) | Medical Infusion Pump Parameter Backup |
Use Scenario: Retaining window position limits, mirror presets, and lighting profiles across ignition cycles. IC Role / Device Role / Timing Role: Microwire EEPROM directly connected to 8-bit automotive MCU with 5 V supply rail. Use Value: −40°C to +125°C rating and 4.5–5.5 V operation guarantee reliable function in under-dash environments. |
Use Scenario: Safeguarding drug dosage limits, pump rate curves, and safety interlock flags during AC power loss. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory with hardware write-protection (EWDS) enabled after each critical update. Use Value: Power-on data protection below 3.8 V prevents corruption during battery switchover or brown-out events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46C-E/SN | VCC range 2.5–5.5 V; lower minimum voltage enables 3.3 V system integration | Supports wider voltage scaling but lacks 5 V noise margin for noisy automotive harnesses | Select when host operates at 3.3 V or mixed-voltage designs require backward compatibility |
| 93AA46C-E/SN | VCC range 1.8–5.5 V; ultra-low voltage operation down to 1.8 V | Enables battery-powered portable devices but reduced ESD robustness (4 kV vs. 93C's unspecified higher rating) | Select for energy-constrained IoT sensors or wearables requiring sub-2 V operation |
Compared with 93LC46C-E/SN and 93AA46C-E/SN, the 93C46C-E/SN provides superior noise immunity and voltage-margin headroom in 5 V automotive systems, while trading off low-voltage flexibility - making it optimal for legacy 5 V MCU platforms where robustness outweighs voltage scalability.
Availability
93C46C-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device manufacturing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93C46C-E/SN 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 93C46C-E/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, high-reliability embedded systems requiring simple 3-wire nonvolatile storage with automotive-grade qualification.
FAQ
What is the function of the ORG pin on the 93C46C-E/SN?
The ORG pin on the 93C46C-E/SN selects memory organization: logic high (VCC) configures 64 × 16-bit mode, and logic low (VSS) configures 128 × 8-bit mode. It must be externally biased - floating is invalid. This pin is absent on A/B variants, making the 93C46C-E/SN uniquely flexible for dual-interface designs without hardware revision.
Does the 93C46C-E/SN support true SPI communication?
No, the 93C46C-E/SN implements a Microwire-compatible 3-wire interface (CS, CLK, DI/DO), not SPI. It lacks separate MISO/MOSI lines and does not support SPI mode bits or daisy-chaining. Data is half-duplex: DI accepts commands and data, while DO outputs read data or Ready/Busy status - requiring careful timing management in host firmware.
What is the maximum clock frequency supported by the 93C46C-E/SN?
The 93C46C-E/SN supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. At lower voltages, maximum frequency decreases: 2 MHz for 2.5–4.5 V (not applicable here), and 1 MHz for 1.8–2.5 V (outside its 4.5–5.5 V operating range). Timing parameters like TCKH (200 ns min) and TCKL (100 ns min) are validated at 3 MHz.
How does the 93C46C-E/SN protect against unintended writes during power-up?
The 93C46C-E/SN incorporates hardware power-on reset (POR) that inhibits all operations until VCC exceeds 3.8 V. Below this threshold, the device remains in EWDS (Erase/Write Disable) state, blocking ERASE, WRITE, and WRAL commands. This ensures no spurious writes occur during power ramp, eliminating need for software-based write-lock initialization.
Can the 93C46C-E/SN be used in place of the 93C46B-E/SN?
Yes, the 93C46C-E/SN is pin-compatible and electrically compatible with the 93C46B-E/SN in 16-bit mode (ORG = VCC), but adds runtime configurability. The 93C46B-E/SN is fixed x16, while the 93C46C-E/SN supports both x8 and x16 via ORG. No PCB changes are needed, but firmware must manage ORG biasing and instruction set alignment for selected mode.
93C46C-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 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-SOIC
93C46C-E/SN FAQ
1.How can I place an order for 93C46C-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C46C-E/SN 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 93C46C-E/SN reliable?
The price and inventory of 93C46C-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C46C-E/SN is usually 5 days.
3.What payment methods are accepted for 93C46C-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C46C-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C46C-E/SN?
93C46C-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C46C-E/SN 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 93C46C-E/SN?
For technical support, including 93C46C-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C46C-E/SN requirements.
6.How does Aetrix verify that 93C46C-E/SN is sourced from the original manufacturer or authorized distributors?
All 93C46C-E/SN 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 93C46C-E/SN meets industry standards.
7.What is the process for return or replacement of 93C46C-E/SN?
All 93C46C-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C46C-E/SN, 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 93C46C-E/SN part is unused and in its original packaging.
Return procedure for 93C46C-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C46C-E/SN 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…
