M34A02

2/15

is followed by a Device Select code and RW bit (as

described

in

Table

3),

terminated

by

an

acknowledge bit.

When writing data to the memory, the device

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 after a

NoAck for Read.

In order to prevent data corruption and inadvertent

Write operations during Power-up, a Power On

Reset (POR) circuit is included. The internal reset

threshold value, and all operations are disabled –

the device will not respond to any command. In the

voltage, below the POR threshold value, all

operations are disabled and the device will not

must be applied before applying any logic signal.

SIGNAL DESCRIPTION

Serial Clock (SCL)

This input signal is used to strobe all data in and

out of the device. In applications where this line is

used by slave devices to synchronize the bus to a

slower clock, the bus master must have an open

drain output, and a pull-up resistor must be

3 indicates how the value of the pull-up resistor

Figure 2. SO and TSSOP Connections

1

AI03795

2

3

4

8

7

6

5

SDA

VSS

SCL

WC

E1

E0

VCC

E2

M34A02

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

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

documents.

2. IPC/JEDEC J-STD-020A

3. JEDEC Std JESD22-A114A (C1=100 pF, R1=1500

Ω, R2=500 Ω)

Symbol

Parameter

Value

Unit

Ambient Operating Temperature

–40 to 125

°C

Storage Temperature

–65 to 150

°C

Lead Temperature during

Soldering

235

235

°C

Input or Output range

–0.6 to 6.5

V

Supply Voltage

–0.3 to 6.5

V

4000

V

Figure 3. Typical ACR Application PCB

Connection (showing E2,E1,E0 address 000)

Note: 1. This arrangement on the chip enable lines allows the

application to start at ACR address 000h.

AI04092

E0

E1

E2

VSS

VCC

WC

SCL

SDA

VCC

VSS

ACR Bus

RL