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CAT25040 Schematic ( PDF Datasheet ) - ON Semiconductor

Teilenummer CAT25040
Beschreibung (CAT25010 - CAT25040) SPI Serial CMOS EEPROM
Hersteller ON Semiconductor
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Gesamt 15 Seiten
CAT25040 Datasheet, Funktion
CAT25010, CAT25020,
CAT25040
1-Kb, 2-Kb and 4-Kb SPI
Serial CMOS EEPROM
Description
The CAT25010/20/40 are 1−Kb/2−Kb/4−Kb Serial CMOS
EEPROM devices internally organized as 128x8/256x8/512x8 bits.
They feature a 16−byte page write buffer and support the Serial
Peripheral Interface (SPI) protocol. The device is enabled through a
Chip Select (CS) input. In addition, the required bus signals are a clock
input (SCK), data input (SI) and data output (SO) lines. The HOLD
input may be used to pause any serial communication with the
CAT25010/20/40 device. These devices feature software and
hardware write protection, including partial as well as full array
protection.
Features
20 MHz (5 V) SPI Compatible
1.8 V to 5.5 V Supply Voltage Range
SPI Modes (0,0) & (1,1)
16−byte Page Write Buffer
Self−timed Write Cycle
Hardware and Software Protection
Block Write Protection
− Protect 1/4, 1/2 or Entire EEPROM Array
Low Power CMOS Technology
1,000,000 Program/Erase Cycles
100 Year Data Retention
Industrial and Extended Temperature Range
PDIP, SOIC, TSSOP 8−Lead and UDFN 8−Pad Packages
These Devices are Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
VCC
SI
CS
WP
HOLD
SCK
CAT25010
CAT25020
CAT25040
SO
VSS
Figure 1. Functional Symbol
www.onsemi.com
SOIC−8
V SUFFIX
CASE 751BD
UDFN−8
HU4 SUFFIX
CASE 517AZ
PDIP−8*
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
PIN CONFIGURATION
CS 1
SO
VCC
HOLD
WP SCK
VSS SI
PDIP (L), SOIC (V),
TSSOP (Y), UDFN (HU4)
For the location of Pin 1, please consult the
corresponding package drawing.
* Not recommended for new designs
Pin Name
CS
SO
WP
VSS
SI
SCK
HOLD
VCC
PIN FUNCTION
Function
Chip Select
Serial Data Output
Write Protect
Ground
Serial Data Input
Serial Clock
Hold Transmission Input
Power Supply
© Semiconductor Components Industries, LLC, 2015
July, 2015 − Rev. 25
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
1 Publication Order Number:
CAT25010/D






CAT25040 Datasheet, Funktion
CAT25010, CAT25020, CAT25040
Table 10. STATUS REGISTER
76
11
5
1
4 3 2 10
1
BP1
BP0
WEL
RDY
Table 11. BLOCK PROTECTION BITS
Status Register Bits
BP1 BP0
0 0 None
Array Address Protected
0 1 CAT25010: 060−07F, CAT25020: 0C0−0FF, CAT25040: 180−1FF
1 0 CAT25010: 040−07F, CAT25020: 080−0FF, CAT25040: 100−1FF
1 1 CAT25010: 000−07F, CAT25020: 000−0FF, CAT25040: 000−1FF
Protection
No Protection
Quarter Array Protection
Half Array Protection
Full Array Protection
WRITE OPERATIONS
The CAT25010/20/40 device powers up into a write
disable state. The device contains a Write Enable Latch
(WEL) which must be set before attempting to write to the
memory array or to the status register. In addition, the
address of the memory location(s) to be written must be
outside the protected area, as defined by BP0 and BP1 bits
from the status register.
Write Enable and Write Disable
The internal Write Enable Latch and the corresponding
Status Register WEL bit are set by sending the WREN
instruction to the CAT25010/20/40. Care must be taken to
take the CS input high after the WREN instruction, as
otherwise the Write Enable Latch will not be properly set.
WREN timing is illustrated in Figure 3. The WREN
instruction must be sent prior to any WRITE or WRSR
instruction.
The internal write enable latch is reset by sending the
WRDI instruction as shown in Figure 4. Disabling write
operations by resetting the WEL bit, will protect the device
against inadvertent writes.
CS
SCK
SI 0 0 0 0 0 1 1 0
SO
Dashed Line = mode (1, 1)
HIGH IMPEDANCE
Figure 3. WREN Timing
CS
SCK
SI
SO
Dashed Line = mode (1, 1)
00 0 0 0 1 00
HIGH IMPEDANCE
Figure 4. WRDI Timing
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6

6 Page









CAT25040 pdf, datenblatt
PIN # 1
IDENTIFICATION
TOP VIEW
CAT25010, CAT25020, CAT25040
PACKAGE DIMENSIONS
SOIC 8, 150 mils
CASE 751BD−01
ISSUE O
E1 E
SYMBOL
A
A1
b
c
D
E
E1
e
h
L
θ
MIN
1.35
0.10
0.33
0.19
4.80
5.80
3.80
0.25
0.40
NOM
1.27 BSC
MAX
1.75
0.25
0.51
0.25
5.00
6.20
4.00
0.50
1.27
D
A1
A
eb
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-012.
h
θ
L
END VIEW
c
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