93C46 Datasheet | Next Electromics

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93C46 1K-Bit Serial EEPROM Technical Summary

Overview

The 93C46 is a 1K-bit (128 x 8 or 64 x 16) serial Electrically Erasable Programmable Read-Only Memory (EEPROM) featuring a Microwire-compatible serial interface. This non-volatile memory device is designed for applications requiring reliable data storage with low power consumption. The 93C46 offers enhanced ESD protection and built-in security features, making it suitable for harsh electrical environments.

Key advantages of the 93C46 include its small footprint, simple 3-wire interface, and low power operation. The device supports both 8-bit and 16-bit organization modes, providing flexibility for different system architectures.

Features

Memory Organization: 128 x 8-bit or 64 x 16-bit
Serial Interface: Microwire-compatible 3-wire (CS, SK, DI/DO)
Enhanced Reliability: 1,000,000 erase/write cycles
Data Retention: 100 years minimum
Wide Voltage Range: 2.5V to 5.5V operation
Low Power Consumption:
- Active current: 1 mA typical
- Standby current: 10 µA maximum
Enhanced ESD Protection: 4000V on all pins
Security Features: Built-in filtering against glitches and noise
Operating Temperature: -40°C to +85°C (industrial grade)
Write Protection: Software and hardware write control

Applications

The 93C46 is widely used in various electronic systems requiring compact, non-volatile memory storage:

Automotive electronics (dashboard, engine control units)
Consumer electronics (TVs, set-top boxes, appliances)
Industrial control systems
Medical equipment
Telecommunications devices
Security systems and access control
Parameter storage in embedded systems
Calibration data storage
Configuration settings in IoT devices

Electrical Characteristics

Absolute Maximum Ratings

Supply Voltage: -0.6V to +7.0V
Input Voltage: -0.6V to VCC + 0.6V
Storage Temperature: -65°C to +150°C
ESD Protection: 4000V (Human Body Model)

DC Characteristics (VCC = 5V ±10%, TA = 25°C)

Supply Current (Read): 1 mA maximum
Supply Current (Write): 3 mA maximum
Standby Current: 10 µA maximum
Input Low Voltage: 0.3VCC maximum
Input High Voltage: 0.7VCC minimum
Output Low Voltage: 0.4V maximum (IOL = 2.1 mA)
Output High Voltage: VCC - 0.7V minimum (IOH = -100 µA)

AC Characteristics

Clock Frequency: 2 MHz maximum
Clock High Time: 250 ns minimum
Clock Low Time: 250 ns minimum
Chip Select Setup Time: 250 ns minimum
Output Hold Time: 50 ns minimum
Write Cycle Time: 5 ms maximum

Package Information

The 93C46 is available in multiple package options to suit different application requirements:

8-Pin Packages

PDIP (Plastic Dual In-line Package):
- Dimensions: 9.27mm x 6.35mm body
- Lead pitch: 2.54mm
- Package code: 8P3
SOIC (Small Outline IC):
- Dimensions: 4.90mm x 3.90mm body
- Lead pitch: 1.27mm
- Package code: 8S1
TSSOP (Thin Shrink Small Outline Package):
- Dimensions: 3.00mm x 3.00mm body
- Lead pitch: 0.65mm
- Package code: 8T1

Pin Configuration

The 8-pin configuration is as follows:

Pin 1 (CS): Chip Select (active high)
Pin 2 (SK): Serial Clock Input
Pin 3 (DI): Data Input (during write operations)
Pin 4 (DO): Data Output (during read operations)
Pin 5 (GND): Ground
Pin 6 (ORG): Memory Organization Select (8/16-bit)
Pin 7 (NC): No Connection
Pin 8 (VCC): Power Supply

Functional Description

The 93C46 operates through a simple 3-wire serial interface consisting of Chip Select (CS), Serial Clock (SK), and bidirectional Data (DI/DO) lines. The device supports both 8-bit and 16-bit data organization, selected via the ORG pin (tied to VCC for 16-bit mode or GND for 8-bit mode).