IS25CD025
256Kbit Single Operating Voltage Serial Flash Memory
With 100 MHz Dual-Output SPI Bus Interface
Output SPI Bus Interface
FEATURES
Memory With 100 MHz Dual-
Output
Power Supply Operation
Memory With 100
• Low Power Consumption
MHz
• Single
SPI Bus Interface
- Typical 6 mA active read current
Dual-Output SPI Bus
- 3.60 V
- Low voltage range: 2.70 V
Interface
• Memory Organization
- IS25CD025: 32K x 8 (256Kbit)
• Cost Effective Sector/Block Architecture
-256Kb : Uniform 4KByte sectors / one uniform
32KByte blocks
• Low standby current 10uA (Max)
• Serial Peripheral Interface (SPI) Compatible
- Supports single- or dual-output
- Supports SPI Modes 0 and 3
- Maximum 33 MHz clock rate for normal read
- Maximum 100 MHz clock rate for fast read
•
Page Program (up to 256 Bytes) Operation
- Typical 2 ms per page program
• Sector, Block or Chip Erase Operation
- Maximum 7 ms sector, block or chip erase
- Typical 10 mA program/erase current
• Hardware Write Protection
- Protect and unprotect the device from write
operation by Write Protect (WP#) Pin
• Software Write Protection
-
The Block Protect (BP2, BP1, BP0) bits allow
partial or entire memory to be configured as read-
only
• High Product Endurance
- Guaranteed 200,000 program/erase cycles per
single sector
- Minimum 20 years data retention
• Industrial Standard Pin-out and Package
- 8-pin SOIC 150mil
- 8-pin TSSOP
- KGD (Call Factory)
- Automotive Grades Available
- Lead-free (Pb-free) package
GENERAL DESCRIPTION
The IS25CD025 are 256Kbit Serial Peripheral Interface (SPI) Flash memories, providing single- or dual-output.
The devices are designed to support a 33 MHz clock rate in normal read mode, and 100 MHz in fast read, the
fastest in the industry. The devices use a single low voltage power supply, wide operating voltage ranging from
2.70 Volt to 3.60 Volt, to perform read, erase and program operations. The devices can be programmed in
standard EPROM programmers.
The IS25CD025 are accessed through a 4-wire SPI Interface consisting of Serial Data Input/Output (SlO), Serial
Data Output (SO), Serial Clock (SCK), and Chip Enable (CE#) pins. They comply with all recognized command
codes and operations. The dual-output fast read operation provides and effective serial data rate of 200MHz.
The devices support page program mode, where 1 to 256 bytes data can be programmed into the memory in
one program operation. These devices are divided into uniform 4 KByte sectors or uniform 32 KByte blocks.
The IS25CD025 are manufactured on pFLASH™’s advanced non-volatile technology. The devices are offered
in 8-pin SOIC 150mil and 8-pin TSSOP. The devices operate at wide temperatures between -40°C to +105°C.
Integrated Silicon Solution, Inc.- www.issi.com
Rev. G
07/31/2013
1
IS25CD025
CONNECTION DIAGRAMS
CE#
SO
WP#
GND
1
2
3
4
8
7
6
5
Vcc
HOLD#
SCK
SI
CE#
SO
1
8
7
Vcc
HOLD#
2
8-Pin TSSOP
WP#
3
6
SCK
GND
4
5
SIO
8-Pin SOIC
PIN DESCRIPTIONS
SYMBOL
CE#
TYPE
INPUT
DESCRIPTION
Chip Enable: CE# low activates the devices internal circuitries for
device operation. CE# high deselects the devices and switches into
standby mode to reduce the power consumption. When a device is not
selected, data will not be accepted via the serial input pin (Sl), and the
serial output pin (SO) will remain in a high impedance state.
Serial Data Clock
Serial Data Input/Output
Serial Data Output
Ground
Device Power Supply
Write Protect: A hardware program/erase protection for all or part of a
memory array. When the WP# pin is low, memory array write-protection depends
on the setting of BP2, BP1 and BP0 bits in the Status Register. When the WP# is
high, the devices are not write-protected.
Hold: Pause serial communication by the master device without resetting
the serial sequence.
SCK
SIO
SO
GND
Vcc
WP#
INPUT
INPUT/OUTPUT
OUTPUT
INPUT
HOLD#
INPUT
Integrated Silicon Solution, Inc.- www.issi.com
Rev. G
07/31/2013
2
IS25CD025
SPI MODES DESCRIPTION
Multiple IS25CD025 devices can be connected on the
SPI serial bus and controlled by a SPI Master, i.e.
microcontroller, as shown in Figure 1. The devices
support either of two SPI modes:
Mode 0 (0, 0)
Mode 3 (1, 1)
The difference between these two modes is the clock
polarity when the SPI master is in Stand-by mode: the
serial clock remains at “0” (SCK = 0) for Mode 0 and
the clock remains at “1” (SCK = 1) for Mode 3. Please
refer to Figure 2. For both modes, the input data is
latched on the rising edge of Serial Clock (SCK), and
the output data is available from the falling edge of
SCK.
Figure 1. Connection Diagram among SPI Master and SPI Slaves (Memory Devices)
SDIO
SPI Interface with
(0,0) or (1,1)
SDI
SCK
SCK
SPI Master
(i.e. Microcontroller)
CS3
CS2
CS1
CE#
SO
SIO
SCK
SO
SIO
SCK
SO
SIO
SPI Memory
Device
SPI Memory
Device
SPI Memory
Devic
e
CE#
WP#
HOLD#
WP#
HOLD#
CE#
WP#
HOLD#
Note: 1. The Write Protect (WP#) and Hold (HOLD#) signals should be driven high or low as
appropriate.
Figure 2. SPI Modes Supported
SCK
Mode 0 (0, 0)
SCK
Mode 3 (1, 1)
SIO
Input mode
SO
MSb
MSb
Integrated Silicon Solution, Inc.- www.issi.com
Rev. G
07/31/2013
4
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