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CAT25080, CAT25160
8-Kb and 16-Kb SPI Serial CMOS EEPROM
FEATURES
10 MHz SPI compatible 1.8V to 5.5V supply voltage range SPI modes (0,0) & (1,1) 32-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 temperature range RoHS-compliant 8 lead PDIP, SOIC, TSSOP and 8-pad TDFN, UDFN packages
DESCRIPTION
The CAT25080/25160 are 8-Kb/16-Kb Serial CMOS EEPROM devices internally organized as 1024x8/2048x8 bits. They feature a 32-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 CAT25080/25160 device. These devices feature software and hardware write protection, including partial as well as full array protection.
PIN CONFIGURATION
PDIP (L) SOIC (V) TSSOP (Y) TDFN (VP2) UDFN (HU2) CS SO WP VSS 1 2 3 4 8 VCC 7 HOLD 6 SCK 5 SI
FUNCTIONAL SYMBOL
VCC
SI CS WP HOLD SCK CAT25080 CAT25160 SO
PIN FUNCTION
Pin Name CS SO WP VSS SI SCK HOLD VCC Function Chip Select Serial Data Output Write Protect Ground Serial Data Input Serial Clock Hold Transmission Input Power Supply
GND
For Ordering Information details, see page 16.
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Doc. No. 1122 Rev. A
CAT25080, CAT25160
ABSOLUTE MAXIMUM RATINGS(1) Parameters Storage Temperature Voltage on any Pin with Respect to Ground RELIABILITY CHARACTERISTICS(3) Symbol NEND(4) TDR Parameter Endurance Data Retention Min 1,000,000 100 Units Program/ Erase Cycles Years
(2)
Ratings -65 to +150 -0.5 to VCC + 0.5
Units C V
D.C. OPERATING CHARACTERISTICS VCC = +1.8V to +5.5V, TA=-40C to +85C unless otherwise specified. Symbol Parameter ICC Supply Current ISB1 ISB2 IL ILO VIL VIH VOL1 VOH1 VOL2 VOH2 Standby Current Standby Current Input Leakage Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Output Low Voltage Output High Voltage VCC > 2.5V, IOL = 3.0mA VCC > 2.5V, IOH = -1.6mA VCC > 1.8V, IOL = 150A VCC > 1.8V, IOH = -100A VCC - 0.2V VCC - 0.8V 0.2 Test Conditions Read, Write, VCC = 5.0V, fSCK = 10MHz, SO open WP VIN = GND or VCC , CS = VCC , = VCC, VCC = 5.0V WP VIN = GND or VCC , CS = VCC , = GND, VCC = 5.0V VIN = GND or VCC -2 -1 -0.5 0.7VCC Min Max 2 2 4 2 1 0.3VCC VCC + 0.5 0.4 Units mA A A A A V V V V V V
Output Leakage Current CS = VCC , VOUT = GND or VCC
PIN CAPACITANCE(3) TA = 25C, f = 1.0MHz, VCC = +5.0V Symbol COUT CIN Test Output Capacitance (SO) Input Capacitance (CS, SCK, SI, , HOLD WP ) Conditions VOUT = 0V VIN = 0V Min Typ Max 8 8 Units pF pF
Notes: (1) Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. (2) The DC input voltage on any pin should not be lower than -0.5V or higher than VCC + 0.5V. During transitions, the voltage on any pin may undershoot to no less than -1.5V or overshoot to no more than VCC + 1.5V, for periods of less than 20ns. (3) These parameters are tested initially and after a design or process change that affects the parameter according to appropriate AEC-Q100 and JEDEC test methods. (4) Page Mode, VCC = 5V, 25C
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160
A.C. CHARACTERISTICS TA = -40C to +85C, unless otherwise specified.(1) VCC = 1.8V-5.5V Symbol fSCK tSU tH tWH tWL tLZ tRI(2) tFI(2) tHD tCD tV tHO tDIS tHZ tCS tCSS tCSH tWPS tWPH tWC(4) Parameter Clock Frequency Data Setup Time Data Hold Time SCK High Time SCK Low Time HOLD to Output Low Z Input Rise Time Input Fall Time HOLD Setup Time HOLD Hold Time Output Valid from Clock Low Output Hold Time Output Disable Time HOLD to Output High Z CS High Time CS Setup Time CS Hold Time Setup Time WP Hold Time WP Write Cycle Time 50 50 50 10 10 5 0 50 100 15 15 15 10 10 5 0 10 75 0 20 25 Min. DC 30 30 75 75 50 2 2 0 10 40 Max. 5 VCC = 2.5V-5.5V Min. DC 20 20 40 40 25 2 2 Max. 10 Units MHz ns ns ns ns ns s s ns ns ns ns ns ns ns ns ns ns ns ms
Power-Up Timing(2)(3) Symbol tPUR tPUW
Notes: (1) AC Test Conditions: Input Pulse Voltages: 0.3VCC to 0.7VCC Input rise and fall times: 10ns Input and output reference voltages: 0.5VCC Output load: current source IOL max/IOH max; CL = 50pF (2) This parameter is tested initially and after a design or process change that affects the parameter. (3) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated. (4) tWC is the time from the rising edge of CS after a valid write sequence to the end of the internal write cycle.
Parameter Power-up to Read Operation Power-up to Write Operation
Max. 1 1
Units ms ms
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Doc. No. 1122 Rev. A
CAT25080, CAT25160 PIN DESCRIPTION
SI: The serial data input pin accepts op-codes, addresses and data. In SPI modes (0,0) and (1,1) input data is latched on the rising edge of the SCK clock input. SO: The serial data output pin is used to transfer data out of the device. In SPI modes (0,0) and (1,1) data is shifted out on the falling edge of the SCK clock. SCK: The serial clock input pin accepts the clock provided by the host and used for synchronizing communication between host and CAT25080/160. CS: The chip select input pin is used to enable/disable the CAT25080/160. When CS is high, the SO output is tri-stated (high impedance) and the device is in Standby Mode (unless an internal write operation is in progress). Every communication session between host and CAT25080/160 must be preceded by a high to low transition and concluded with a low to high transition of the CS input. : The write protect input pin will allow all write WP operations to the device when held high. When WP pin is tied low and the WPEN bit in the Status Register (refer to Status Register description, later in this Data Sheet) is set to "1", writing to the Status Register is disabled. : HOLD The input pin is used to pause trans- HOLD mission between host and CAT25080/160, without having to retransmit the entire sequence at a later time. To pause, HOLD must be taken low and to resume it must be taken back high, with the SCK input low during both transitions. When not used for pausing, the input should be tied to VCC, HOLD either directly or through a resistor. Figure 1. Synchronous Data Timing
V IH tCS
FUNCTIONAL DESCRIPTION
The CAT25080/160 devices support the Serial Periphe- ral Interface (SPI) bus protocol, modes (0,0) and (1,1). The device contains an 8-bit instruction register. The instruction set and associated op-codes are listed in Table 1. Reading data stored in the CAT25080/160 is accom- plished by simply providing the READ command and an address. Writing to the CAT25080/160, in addition to a WRITE command, address and data, also requires enabling the device for writing by first setting certain bits in a Status Register, as will be explained later. After a high to low transition on the CS input pin, the CAT25080/160 will accept any one of the six instruction op-codes listed in Table 1 and will ignore all other possible 8-bit combinations. The communication proto- col follows the timing from Figure 1.
Table 1: Instruction Set Instruction WREN WRDI RDSR WRSR READ WRITE Opcode 0000 0110 0000 0100 0000 0101 0000 0001 0000 0011 0000 0010 Operation Enable Write Operations Disable Write Operations Read Status Register Write Status Register Read Data from Memory Write Data to Memory
CS
VIL VIH VIL VIH tSU tCSS tCSH
SCK
tWH tH
tWL
SI
VALID IN
tRI
tFI
VIL tV
tHO
tDIS HI-Z
SO
VOH VOL
HI-Z
Note: Dashed Line = mode (1, 1) - - - - - -
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160 STATUS REGISTER
The Status Register, as shown in Table 2, contains a number of status and control bits. The (Ready) bit indicates whether the device is RDY busy with a write operation. This bit is automatically set to 1 during an internal write cycle, and reset to 0 when the device is ready to accept commands. For the host, this bit is read only. The WEL (Write Enable Latch) bit is set/reset by the WREN/WRDI commands. When set to 1, the device is in a Write Enable state and when set to 0, the device is in a Write Disable state. The BP0 and BP1 (Block Protect) bits determine which blocks are currently write protected. They are set by the Table 2. Status Register 7 WPEN 6 0 5 0 4 0 3 BP1 2 BP0 1 WEL 0 RDY user with the WRSR command and are non-volatile. The user is allowed to protect a quarter, one half or the entire memory, by setting these bits according to Table 3. The protected blocks then become read-only. The WPEN (Write Protect Enable) bit acts as an enable for the pin. Hardware write protection is enabled WP when the pin is low and the WPEN bit is 1. This WP condition prevents writing to the status register and to the block protected sections of memory. While hardware write protection is active, only the non-block protected memory can be written. Hardware write protection is disabled when the pin is high or the WP WPEN bit is 0. The WPEN bit, pin and WEL bit WP combine to either permit or inhibit Write operations, as detailed in Table 4.
Table 3. Block Protection Bits Status Register Bits BP1 0 0 1 1 BP0 0 1 0 1 Array Address Protected None 25080: 0300-03FF 25160: 0600-07FF 25080: 0200-03FF 25160: 0400-07FF 25080: 0000-03FF 25160: 0000-07FF Protection No Protection Quarter Array Protection Half Array Protection Full Array Protection
Table 4. Write Protect Conditions WPEN 0 0 1 1 X X WP X X Low Low High High WEL 0 1 0 1 0 1 Protected Blocks Protected Protected Protected Protected Protected Protected Unprotected Blocks Protected Writable Protected Writable Protected Writable Status Register Protected Writable Protected Protected Protected Writable
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Doc. No. 1122 Rev. A
CAT25080, CAT25160 WRITE OPERATIONS
The CAT25080/160 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 CAT25080/160. Care must be taken to Figure 2. WREN Timing
CS
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 2. The WREN instruction must be sent prior any WRITE or WRSR instruction. The internal write enable latch is reset by sending the WRDI instruction as shown in Figure 3. Disabling write operations by resetting the WEL bit, will protect the device against inadvertent writes.
SCK
SI
0
0
0
0
0
1
1
0
SO
HIGH IMPEDANCE
Note: Dashed Line = mode (1, 1) - - - - - -
Figure 3. WRDI Timing
CS
SCK
SI
0
0
0
0
0
1
0
0
SO
HIGH IMPEDANCE
Note: Dashed Line = mode (1, 1) - - - - - -
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160
Byte Write Once the WEL bit is set, the user may execute a write sequence, by sending a WRITE instruction, a 16-bit address and data as shown in Figure 4. Only 10 significant address bits are used by the CAT25080 and 11 by the CAT25160. The rest are don't care bits, as shown in Table 5. Internal programming will start after the low to high CS transition. During an internal write cycle, all commands, except for RDSR (Read Status Register) will be ignored. The bit will indicate if the RDY internal write cycle is in progress (RDY high), or the the device is ready to accept commands (RDY low). Page Write After sending the first data byte to the CAT25080/160, the host may continue sending data, up to a total of 32 bytes, according to timing shown in Figure 5. After each data byte, the lower order address bits are automatically incremented, while the higher order address bits (page address) remain unchanged. If during this process the end of page is exceeded, then loading will "roll over" to the first byte in the page, thus possibly overwriting previoualy loaded data. Following completion of the write cycle, the CAT25080/160 is automatically returned to the write disable state.
Table 5. Byte Address Device CAT25080 CAT25160 Address Significant Bits A9 - A0 A10 - A0 Address Don't Care Bits A15 - A10 A15 - A11 # Address Clock Pulse 16 16
Figure 4. Byte WRITE Timing
CS 0 SCK
OPCODE
1
2
3
4
5
6
7
8
21
22
23
24
25
26
27
28
29
30
31
BYTE ADDRESS* 1 0 AN
DATA IN
SI
0
0
0
0
0
0
A0 D7 D6 D5 D4 D3 D2 D1 D0
SO
HIGH IMPEDANCE
* Please check the Byte Address Table (Table 5)
Note: Dashed Line = mode (1, 1) - - - - - -
Figure 5. Page WRITE Timing
CS 0 SCK
OPCODE
1
2
3
4
5
6
7
8
21
22
23 24-31 32-39
24+(N-1)x8-1..24+(N-1)x8 24+Nx8-1
BYTE ADDRESS* 0 1 0 AN A0
Data Byte 1
DATA IN Data Byte 2 Data Byte 3 Data Byte N 0 7..1
SI
0
0
0
0
0
SO *Please check the Byte Address Table. (Table 5)
HIGH IMPEDANCE
Note: Dashed Line = mode (1, 1) - - - - - -
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Doc. No. 1122 Rev. A
CAT25080, CAT25160
Write Status Register The Status Register is written by sending a WRSR instruction according to timing shown in Figure 6. Only bits 2, 3 and 7 can be written using the WRSR command. Write Protection ) The Write Protect (WP pin can be used to protect the Block Protect bits BP0 and BP1 against being inadvertently altered. When is low and the WPEN WP bit is set to "1", write operations to the Status Register are inhibited. going low while CS is still low will WP interrupt a write to the status register. If the internal write cycle has already been initiated, going low will WP have no effect on any write operation to the Status Register. The pin function is blocked when the WP WPEN bit is set to "0". The input timing is shown in WP Figure 7.
Figure 6. WRSR Timing
CS 0 SCK
OPCODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
DATA IN
SI
0
0
0
0
0
0
0
1
7
MSB
6
5
4
3
2
1
0
SO
HIGH IMPEDANCE
Note: Dashed Line = mode (1, 1) - - - - - -
Figure 7. Timing WP
t WP S t WPH
CS
SCK
WP
WP
Note: Dashed Line = mode (1, 1) - - - - - -
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160 READ OPERATIONS
Read from Memory Array To read from memory, the host sends a READ instruction followed by a 16-bit address (see Table 5 for the number of significant address bits). After receiving the last address bit, the CAT25080/160 will respond by shifting out data on the SO pin (as shown in Figure 8). Sequentially stored data can be read out by simply continuing to run the clock. The internal address pointer is automatically incremented to the next higher address as data is shifted out. After reaching the highest memory address, the address counter "rolls over" to the lowest memory address, and the read cycle can be continued indefinitely. The read operation is terminated by taking CS high. Read Status Register To read the status register, the host simply sends a RDSR command. After receiving the last bit of the command, the CAT25080/160 will shift out the contents of the status register on the SO pin (Figure 9). The status register may be read at any time, including during an internal write cycle.
Figure 8. READ Timing
CS 0 SCK
OPCODE
1
2
3
4
5
6
7
8
9
10
20
21
22
23
24
25
26
27
28
29
30
BYTE ADDRESS* 0 1 1 AN A0
DATA OUT
SI
0
0
0
0
0
SO
HIGH IMPEDANCE
7
MSB
6
5
4
3
2
1
0
* Please check the Byte Address Table (Table 5).
Note: Dashed Line = mode (1, 1) - - - - - -
Figure 9. RDSR Timing
CS 0 SCK
OPCODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SI
0
0
0
0
0
1
0
1
DATA OUT
SO
HIGH IMPEDANCE
7
MSB
6
5
4
3
2
1
0
Note: Dashed Line = mode (1, 1) - - - - - -
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Doc. No. 1122 Rev. A
CAT25080, CAT25160
Hold Operation The input can be used to pause communication HOLD between host and CAT25080/160. To pause, HOLD must be taken low while SCK is low (Figure 10). During the hold condition the device must remain selected (CS low). During the pause, the data output pin (SO) is tristated (high impedance) and SI transitions are ignored. To resume communication, HOLD must be taken high while SCK is low. The CAT25080/160 device powers up in a write disable state and in a low power standby mode. A WREN instruction must be issued prior any writes to the device. After power up, the CS pin must be brought low to enter a ready state and receive an instruction. After a successful byte/page write or status register write, the device goes into a write disable mode. The CS input must be set high after the proper number of clock cycles to start the internal write cycle. Access to the memory array during an internal write cycle is ignored and programming is continued. Any invalid op-code will be ignored and the serial output pin (SO) will remain in the high impedance state.
DESIGN CONSIDERATIONS
The CAT25080/160 devices incorporate Power-On Reset (POR) circuitry which protects the internal logic against powering up in the wrong state. The device will power up into Standby mode after VCC exceeds the POR trigger level and will power down into Reset mode when VCC drops below the POR trigger level. This bidirectional POR behavior protects the device against `brown-out' failure following a temporary loss of power.
Figure 10. HOLD Timing
CS tCD SCK tHD HOLD tHZ SO tHD tCD
HIGH IMPEDANCE
tLZ
Note: Dashed Line = mode (1, 1) - - - - - -
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160 PACKAGE OUTLINES
8-lEAD 300MIL WIDE PLASTIC DIP (L)
E1
E D
A2
A
c
A1
L
e b2 b
eB
SYMBOL A A1 A2 b b2 c D E E1 e eB L
MIN 0.38 3.05 0.36 1.14 0.21 9.02 7.62 6.09 7.87 2.92
NOM
MAX 4.57 3.81 0.56 1.77 0.35 10.16 8.25 7.11 9.65 3.81
0.46 0.26 7.87 6.35 2.54 BSC
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Notes: (1) (2) (3) All dimensions are in millimeters. Complies with JEDEC specification MS001 Dimensioning and tolerancing per ANSI Y14.5M-1982.
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Doc. No. 1122 Rev. A
CAT25080, CAT25160
8-LEAD 150 MIL SOIC (V)
E1 E
D A q1 e b A1
h x 45 C
L
SYMBOL A1 A b C D E E1 e h L q1
MIN 0.10 1.35 0.33 0.19 4.80 5.80 3.80
NOM
MAX 0.25 1.75 0.51 0.25 5.00 6.20 4.00
1.27 BSC 0.25 0.40 0 0.50 1.27 8
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Notes: (1) (2) All dimensions are in millimeters. Complies with JEDEC specification MS-012.
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160
8-LEAD TSSOP (Y)
D
8 5
SEE DETAIL A
c E E1
E/2
1
4
GAGE PLANE
PIN #1 IDENT. 0.25 q1 A2 L SEATING PLANE SEE DETAIL A A
e b
A1
SYMBOL A A1 A2 b c D E E1 e L q1
MIN 0.05 0.80 0.19 0.09 2.90 6.30 4.30 0.50 0.00
NOM
MAX 1.20 0.15 1.05 0.30 0.20 3.10 6.50 4.50 0.75 8.00
0.90
3.00 6.4 4.40 0.65 BSC 0.60
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Notes: (1) (2) All dimensions are in millimeters. Complies with JEDEC Standard MO-153
(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. 1122 Rev. A
CAT25080, CAT25160
8-PAD TDFN (2 x 3mm) PACKAGE (VP2)
A
E
PIN 1 INDEX AREA
D
A1
A2 A3
D2
SYMBOL A A1 A2 A3 b D D2 E E2 e L
MIN 0.70 0.00 0.45 0.20 1.90 1.30 2.90 1.20 0.20
NOM 0.75 0.02 0.55 0.20 REF 0.25 2.00 1.40 3.00 1.30 0.50 TYP 0.30
MAX 0.80 0.05 0.65 0.30 2.10 1.50 3.10 1.40 0.40
b e 3xe E2
PIN 1 ID
L
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Notes: (1) (2) All dimensions are in millimeters. Complies with JEDEC specification MO-229. 14
Doc. No. 1122 Rev. A
(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT25080, CAT25160
8-PAD UDFN (2 x 2mm) PACKAGE (HU2)
DETAIL A
PIN#1 INDENTIFICATION PIN#1 INDEX AREA
TOP VIEW
SIDE VIEW
BOTTOM VIEW
SYMBOL
MIN
NOM
MAX
DETAIL A
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Notes: (1) (2) All dimensions are in millimeters. Complies with JEDEC specification MO-229.
(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. 1122 Rev. A
CAT25080, CAT25160 ORDERING INFORMATION
Prefix CAT
Company ID Product Number 25080: 8-Kb 25160: 16-Kb L: V: Y: VP2: HU2:
Device # Suffix 25160 V
Package PDIP SOIC, JEDEC TSSOP TDFN (2 x 3mm) UDFN (2 x 2mm)
I
Temperature Range I = Industrial (-40C to 85C)
-G
Lead Finish Blank: Matte-Tin G: NiPdAu
T3
Tape & Reel T: Tape & Reel 3: 3000 units/Reel
Notes: (1) (2) (3) (4) All packages are RoHS-compliant (Lead-free, Halogen-free). The standard lead finish is NiPdAu. The device used in the above example is a CAT25160VI-GT3 (SOIC, Industrial Temperature, NiPdAu, Tape & Reel). For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office.
Doc. No. 1122 Rev. A
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(c) 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice
REVISION HISTORY
Date 12/06/2006 Rev. A Comments Initial Issue
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Document No: 1122 Revision: A Issue date: 12/06/06

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