IS93C46B-3PI ISSI, Integrated Silicon Solution Inc, IS93C46B-3PI Datasheet - Page 2

• Manufacturer Part Number: IS93C46B-3PI
• Description: IC EEPROM 1KBIT 2MHZ 8DIP
• Manufacturer: ISSI, Integrated Silicon Solution Inc

Specifications of IS93C46B-3PI

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 1K (128 x 8 or 64 x 16)
• Speed: 1MHz, 2MHz
• Interface: Microwire, 3-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IS93C46B
PIN CONFIGURATIONS
PIN DESCRIPTIONS
2
Applications
The IS93C46B is very popular in many high-volume
applications which require low-power, low-density
storage. Applications using this device include
industrial controls, networking, and numerous other
consumer electronics.
Endurance and Data Retention
The IS93C46B is designed for applications requiring up to
1M programming cycles (WRITE, WRALL, ERASE and
ERAL). It provides 40 years of secure data retention without
power after the execution of 1M programming cycles.
Device Operations
The IS93C46B is controlled by a set of instructions
which are clocked-in serially on the Din pin. Before
each low-to-high transition of the clock (SK), the CS pin
must have already been raised to HIGH, and the Din
value must be stable at either LOW or HIGH. Each
8-Pin DIP, 8-Pin TSSOP
CS
SK
D
D
NC
Vcc
GND
D
IN
OUT
OUT
D
CS
SK
IN
1
2
3
4
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Not Connected
Power
Ground
8
7
6
5
VCC
NC
NC
GND
8-Pin JEDEC SOIC “G”
VCC
NC
CS
SK
Integrated Silicon Solution, Inc. — www.issi.com —
1
2
3
4
(Rotated)
instruction begins with a start bit of the logical “1” or
HIGH. Following this are the opcode (2 bits),
address field (6 bits), and data, if appropriate. The
clock signal may be held stable at any moment to
suspend the device at its last state, allowing clock-
speed flexibility. Upon completion of bus
communication, CS would be pulled LOW. The device
then would enter Standby mode if no internal
programming is underway.
Read (READ)
The READ instruction is the only instruction that outputs
serial data on the D
address have been decoded, data is transferred from the
selected memory register into a serial shift register. (Please
note that one logical “0” bit precedes the actual 16-bit
output data string.) The output on D
low-to-high transitions of SK (see Figure 3).
Low Voltage Read
The IS93C46B has been designed to ensure that data
read operations are reliable in low voltage environments.
They provide accurate operation with Vcc as low as 2.5V.
Auto Increment Read Operations
In the interest of memory transfer operation applications,
the IS93C46B has been designed to output a continuous
stream of memory content in response to a single read
operation instruction. To utilize this function, the system
asserts a read instruction specifying a start location ad-
dress. Once the 16 bits of the addressed register have
been clocked out, the data in consecutively higher address
locations is output. The address will wrap around continu-
ously with CS HIGH until the chip select (CS) control pin is
brought LOW. This allows for single instruction data dumps
to be executed with a minimum of firmware overhead.
8
7
6
5
NC
GND
D
D
OUT
IN
8-Pin JEDEC SOIC “GR”
OUT
D
OUT
D
CS
SK
pin. After the read instruction and
IN
1
2
3
4
OUT
changes during the
1-800-379-4774
8
7
6
5
VCC
NC
NC
GND
10/30/16
Rev. B
®