M14C64, M14C32

2/14

form only. For availability of the M14C64 in wafer

form, please contact your ST sales office.

memory standard. This is a two wire serial inter-

face that uses a bi-directional data bus and serial

clock. The memory carries a built-in 7-bit unique

Device Type Identifier code (1010000) in accord-

protocol, with all memory operations synchronized

by the serial clock. Read and write operations are

initiated by a START condition, generated by the

bus master. The START condition is followed by

the Device Select Code which is composed of a

stream of 7 bits (1010000), plus one read/write bit

(R/W) and is terminated by an acknowledge bit.

When writing data to the memory, the memory in-

following the bus master’s 8-bit transmission.

When data is read by the bus master, the bus

master acknowledges the receipt of the data byte

in the same way. Data transfers are terminated by

a STOP condition after an Ack for WRITE, and af-

ter a NoACK for READ.

In order to prevent data corruption and inadvertent

write operations during power up, a Power On Re-

set (POR) circuit is included. The internal reset is

POR threshold value, and all operations are dis-

abled – the device will not respond to any com-

operating voltage, below the POR threshold value,

all operations are disabled and the device will not

must be applied before applying any logic signal.

Figure 2. D20 Contact Connections

AI02168

VCC

GND

SCL

SDA

WC

Figure 3. D22 Contact Connections

AI02204

VCC

GND

SCL

SDA

WC

Note: 1. Except for the rating “Operating Temperature Range”, stresses above those listed in the Table “Absolute Maximum Ratings” may

cause permanent damage to the device. These are stress ratings only, and operation of the device at these or any other conditions

above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi-

tions for extended periods may affect device reliability. Refer also to the ST SURE Program and other relevant quality documents.

2. MIL-STD-883C, 3015.7 (100 pF, 1500

Ω)

3. EIAJ IC-121 (Condition C) (200 pF, 0

Ω)

Symbol

Parameter

Value

Unit

Ambient Operating Temperature

0 to 70

°C

Storage Temperature

Wafer form

Module form

-65 to 150

-40 to 120

°C

Input or Output range

-0.6 to 6.5

V

Supply Voltage

-0.3 to 6.5

V

4000

V

400

V