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Preliminary Information X24C01
1K
X24C01
Serial E2PROM
128 x 8 Bit
FEATURES
DESCRIPTION
The X24C01 is a CMOS 1024 bit serial E2PROM, internally organized as 128 x 8. The X24C01 features a serial interface and software protocol allowing operation on a simple two wire bus. Xicor E2PROMs are designed and tested for applications requiring extended endurance. Inherent data retention is greater than 100 years.
* * * * * * * *
2.7V to 5.5V Power Supply Low Power CMOS --Active Current Less Than 1 mA --Standby Current Less Than 50 A Internally Organized 128 x 8 2 Wire Serial Interface --Bidirectional Data Transfer Protocol Four Byte Page Write Mode Self Timed Write Cycle --Typical Write Cycle Time of 5 ms High Reliability --Endurance: 100,000 Cycles --Data Retention: 100 Years 8-Pin Mini-DIP, 8-PIN MSOP, and 8-PIN SOIC Packages
FUNCTIONAL DIAGRAM
(8) VCC (4) VSS (5) SDA START STOP LOGIC CONTROL LOGIC
START CYCLE
H.V. GENERATION TIMING & CONTROL
(6) SCL
LOAD
INC
XDEC
E2PROM 32 X 32
WORD ADDRESS COUNTER R/W YDEC 8 CK PIN DOUT ACK
3837 FHD F01
DATA REGISTER
DOUT
(c) Xicor, 1991 Patents Pending 3837-1.2 7/28/97 T1/C0/D0 SH
1
Characteristics subject to change without notice
X24C01
PIN DESCRIPTIONS Serial Clock (SCL) The SCL input is used to clock all data into and out of the device. Serial Data (SDA) SDA is a bidirectional pin used to transfer data into and out of the device. It is an open drain output and may be wire-ORed with any number of open drain or open collector outputs. An open drain output requires the use of a pull-up resistor. For selecting typical values, refer to the Guidelines for Calculating Typical Values of Bus Pull-Up Resistors graph.
NC 1 2 3 4 X24C01
NC NC NC VSS 1 2 3 4 X24C01
DIP PLASTIC
PIN CONFIGURATION
8 7 6 5
VCC NC SCL SDA
3837 FHD F02
SOIC/MSOP 8 7 6 5 VCC NC SCL SDA
PIN NAMES Symbol NC VSS VCC SDA SCL A.C. CONDITIONS OF TEST Input Pulse Levels Input Rise and Fall Times Input and Output Timing Levels VCC x 0.1 to VCC x 0.9 10 ns Description No Connect Ground Supply Voltage Serial Data Serial Clock
3837 PGM T01
NC NC VSS
3837 FHD F03
EQUIVALENT A.C. LOAD CIRCUIT
5V 2190 OUTPUT
VCC x 0.5
3837 PGM T02
100pF
3837 FHD F16
2
X24C01
DEVICE OPERATION The X24C01 supports a bidirectional bus oriented protocol. The protocol defines any device that sends data onto the bus as a transmitter and the receiving device as the receiver. The device controlling the transfer is a master and the device being controlled is the slave. The master will always initiate data transfers and provide the clock for both transmit and receive operations. Therefore, the X24C01 will be considered a slave in all applications. Clock and Data Conventions Data states on the SDA line can change only during SCL LOW. SDA state changes during SCL HIGH are reserved for indicating start and stop conditions. Refer to Figures 1 and 2. Start Condition All commands are preceded by the start condition, which is a HIGH to LOW transition of SDA when SCL is HIGH. The X24C01 continuously monitors the SDA and SCL lines for the start condition and will not respond to any command until this condition has been met.
Figure 1. Data Validity
SCL
SDA DATA STABLE DATA CHANGE
3837 FHD F06
3
X24C01
Stop Condition All communications must be terminated by a stop condition, which is a LOW to HIGH transition of SDA when SCL is HIGH. The stop condition is also used by the X24C01 to place the device in the standby power mode after a read sequence. A stop condition can only be issued after the transmitting device has released the bus. Acknowledge Acknowledge is a software convention used to indicate successful data transfers. The transmitting device will release the bus after transmitting eight bits. During the ninth clock cycle the receiver will pull the SDA line LOW to acknowledge that it received the eight bits of data. Refer to Figure 3. Figure 2. Definition of Start and Stop The X24C01 will respond with an acknowledge after recognition of a start condition, a seven bit word address and a R/W bit. If a write operation has been selected, the X24C01 will respond with an acknowledge after each byte of data is received. In the read mode the X24C01 will transmit eight bits of data, release the SDA line and monitor the line for an acknowledge. If an acknowledge is detected and no stop condition is generated by the master, the X24C01 will continue to transmit data. If an acknowledge is not detected, the X24C01 will terminate further data transmissions. The master must then issue a stop condition to return the X24C01 to the standby power mode and place the device into a known state.
SCL
SDA START CONDITION STOP CONDITION
3837 FHD F07
Figure 3. Acknowledge Response From Receiver
SCL FROM MASTER
1
8
9
DATA OUTPUT FROM TRANSMITTER
DATA OUTPUT FROM RECEIVER START ACKNOWLEDGE
3837 FHD F08
4
X24C01
WRITE OPERATIONS Byte Write To initiate a write operation, the master sends a start condition followed by a seven bit word address and a write bit. The X24C01 responds with an acknowledge, then waits for eight bits of data and then responds with an acknowledge. The master then terminates the transfer by generating a stop condition, at which time the X24C01 begins the internal write cycle to the nonvolatile memory. While the internal write cycle is in progress, the X24C01 inputs are disabled, and the device will not respond to any requests from the master. Refer to Figure 4 for the address, acknowledge and data transfer sequence. Page Write The most significant five bits of the word address define the page address. The X24C01 is capable of a four byte page write operation. It is initiated in the same manner as the byte write operation, but instead of terminating the transfer of data after the first data byte, the master can transmit up to three more bytes. After the receipt of each data byte, the X24C01 will respond with an acknowledge. After the receipt of each data byte, the two low order address bits are internally incremented by one. The high order five bits of the address remain constant. If the master should transmit more than four data bytes prior to generating the stop condition, the address counter will "roll over" and the previously transmitted data will be overwritten. As with the byte write operation, all inputs are disabled until completion of the internal write cycle. Refer to Figure 5 for the address, acknowledge and data transfer sequence.
Figure 4. Byte Write
S T WORD A ADDRESS (n) R T S M S B LRA S/C BWK A C K
3837 FHD F09
BUS ACTIVITY:
DATA n
S T O P P
SDA LINE BUS ACTIVITY: X24C01
Figure 5. Page Write
S T WORD A ADDRESS (n) R T S M S B LRA S/C BWK A C K A C K A C K
3837 FHD F10
BUS ACTIVITY:
DATA n
DATA n+1
DATA n+3
S T O P P
SDA LINE BUS ACTIVITY: X24C01
5
X24C01
Acknowledge Polling The disabling of the inputs can be used to take advantage of the typical 5 ms write cycle time. Once the stop condition is issued to indicate the end of the host's write operation the X24C01 initiates the internal write cycle. ACK polling can be initiated immediately. This involves issuing the start condition followed by the word address for a write operation. If the X24C01 is still busy with the write operation no ACK will be returned. If the X24C01 has completed the write operation an ACK will be returned and the controller can then proceed with the next read or write operation. READ OPERATIONS Read operations are initiated in the same manner as write operations with exception that the R/W bit of the word address is set to a one. There are two basic read operations: byte read and sequential read. It should be noted that the ninth clock cycle of the read operation is not a "don't care." To terminate a read operation, the master must either issue a stop condition during the ninth cycle or hold SDA HIGH during the ninth clock cycle and then issue a stop condition. Byte Read To initiate a read operation, the master sends a start condition followed by a seven bit word address and a read bit. The X24C01 responds with an acknowledge and then transmits the eight bits of data. The read operation is terminated by the master; by not responding with an acknowledge and by issuing a stop condition. Refer to Figure 7 for the start, word address, read bit, acknowledge and data transfer sequence. Figure 7. Byte Read
S T WORD A ADDRESS n R T S M S B LRA S/C BWK DATA n
3837 FHD F12
Figure 6. ACK Polling Sequence
WRITE OPERATION COMPLETED ENTER ACK POLLING
ISSUE START
ISSUE SLAVE ADDRESS AND R/W = 0
ISSUE STOP
ACK RETURNED? YES NEXT OPERATION A WRITE? YES
NO
NO
ISSUE STOP
PROCEED
PROCEED
3837 FHD F11
BUS ACTIVITY: MASTER SDA LINE BUS ACTIVITY: X24C01
S T O P P
6
X24C01
Sequential Read Sequential read is initiated in the same manner as the byte read. The first data byte is transmitted as with the byte read mode, however, the master now responds with an acknowledge, indicating it requires additional data. The X24C01 continues to output data for each acknowledge received. The read operation is terminated by the master; by not responding with an acknowledge and by issuing a stop condition. Figure 8. Sequential Read
A C K A C K A C K S T O P P RA /C WK DATA n DATA n+1 DATA n+2 DATA n+x
3837 FHD F13
The data output is sequential, with the data from address n followed by the data from n + 1. The address counter for read operations increments all address bits, allowing the entire memory contents to be serially read during one operation. At the end of the address space (address 127) the counter "rolls over" to zero and the X24C01 continues to output data for each acknowledge received. Refer to Figure 8 for the address, acknowledge and data transfer sequence.
BUS ACTIVITY: ADDRESS
SDA LINE BUS ACTIVITY: X24C01
Figure 9. Typical System Configuration
VCC PULL-UP RESISTORS SDA SCL MASTER TRANSMITTER/ RECEIVER SLAVE RECEIVER SLAVE TRANSMITTER/ RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER/ RECEIVER
3837 FHD F14
7
X24C01
ABSOLUTE MAXIMUM RATINGS* Temperature Under Bias .................. -65C to +135C Storage Temperature ....................... -65C to +150C Voltage on any Pin with Respect to VSS ............................ -1.0V to +7.0V D.C. Output Current ............................................ 5 mA Lead Temperature (Soldering, 10 Seconds) ............................. 300C RECOMMENDED OPERATING CONDITIONS Temperature Commercial Industrial Military Min. 0C -40C -55C Max. 70C +85C +125C Supply Voltage X24C01 X24C01-3.5 X24C01-3 X24C01-2.7 Limits 4.5V to 5.5V 3.5V to 5.5V 3.0V to 5.5V 2.7V to 5.5V *COMMENT Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified) Limits Symbol ICC(1) ICC(2) ISB1(1) ISB2(1) ILI ILO VlL(2) VIH(2) VOL Parameter VCC Supply Current (Read) VCC Supply Current (Write) VCC Standby Current VCC Standby Current Input Leakage Current Output Leakage Current Input Low Voltage Input High Voltage Output Low Voltage Units Test Conditions mA SCL = VCC x 0.1/VCC x 0.9 Levels @ 100 KHz, SDA = Open A SCL = SDA = VCC, VCC = 5V 10% 50 A SCL = SDA = VCC, VCC = 2.7V 10 A VIN = GND to VCC 10 A VOUT = GND to VCC -1.0 VCC x 0.3 V VCC x 0.7 VCC + 0.5 V 0.4 V IOL = 2.1 mA
3837 PGM T03
Min.
Max. 1 2 100
CAPACITANCE TA = 25C, f = 1.0 MHz, VCC = 5V Symbol CI/O(3) CIN(3) Parameter Input/Output Capacitance (SDA) Input Capacitance (SCL) Max. 8 6 Units pF pF Test Conditions VI/O = 0V VIN = 0V
3837 PGM T05
Notes: (1) Must perform a stop command prior to measurement. (2) VIL min. and VIH max. are for reference only and are not tested. (3) This parameter is periodically sampled and not 100% tested.
8
X24C01
A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified) Read & Write Cycle Limits Symbol fSCL TI tAA tBUF tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR tF tSU:STO tDH POWER-UP TIMING Symbol tPUR(4) tPUW(4) Bus Timing
tF SCL tSU:STA SDA IN tAA SDA OUT
3837 FHD F04
Parameter SCL Clock Frequency Noise Suppression Time Constant at SCL, SDA Inputs SCL Low to SDA Data Out Valid Time the Bus Must Be Free Before a New Transmission Can Start Start Condition Hold Time Clock Low Period Clock High Period Start Condition Setup Time Data In Hold Time Data In Setup Time SDA and SCL Rise Time SDA and SCL Fall Time Stop Condition Setup Time Data Out Hold Time
Min. 0
Max. 100 100 3.5
Units KHz ns s s s s s s s ns s ns s ns
3837 PGM T06
0.3 4.7 4.0 4.7 4.0 4.7 0 250
1 300 4.7 300
Parameter Power-up to Read Operation Power-up to Write Operation
Max. 1 5
Units ms ms
3837 PGM T07
tHIGH
tLOW
tR
tHD:STA
tHD:DAT
tSU:DAT
tSU:STO
tDH
tBUF
Note:
(4) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated. These parameters are periodically sampled and not 100% tested.
9
X24C01
WRITE CYCLE LIMITS Symbol tWR(6) Parameter Write Cycle Time Min. Typ.(5) 5 Max. 10 Units ms
3837 PGM T08
The write cycle time is the time from a valid stop condition of a write sequence to the end of the internal erase/program cycle. During the write cycle, the X24C01 Write Cycle Timing
bus interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its word address.
SCL
SDA
8th BIT WORD n
ACK tWR STOP CONDITION START CONDITION X24C01 ADDRESS
3837 FHD F05
Notes: (5) Typical values are for TA = 25C and nominal supply voltage (5V). (6) tWR is the minimum cycle time to be allowed from the system perspective unless polling techniques are used. It is the maximum time the device requires to automatically complete the internal write operation.
Guidelines for Calculating Typical Values of Bus Pull-Up Resistors
120
SYMBOL TABLE
WAVEFORM INPUTS Must be steady May change from Low to High May change from High to Low Don't Care: Changes Allowed N/A OUTPUTS Will be steady Will change from Low to High Will change from High to Low Changing: State Not Known Center Line is High Impedance
RESISTANCE (K)
100 80 60 40 20 0 0
RMIN =
VCC MAX IOL MIN tR CBUS
=2.6K
RMAX =
MAX. RESISTANCE
MIN. RESISTANCE
20
40
60
80 100 120
BUS CAPACITANCE (pF)
3837 FHD F15
10
X24C01
PACKAGING INFORMATION
8-LEAD PLASTIC IN-LINE PACKAGE TYPE P
0.430 (10.92) 0.360 (9.14)
0.092 (2.34) DIA. NOM.
0.255 (6.47) 0.245 (6.22)
PIN 1 INDEX PIN 1 0.300 (7.62) REF. 0.060 (1.52) 0.020 (0.51)
HALF SHOULDER WIDTH ON ALL END PINS OPTIONAL SEATING PLANE 0.150 (3.81) 0.125 (3.18)
0.140 (3.56) 0.130 (3.30)
0.020 (0.51) 0.015 (0.38) 0.062 (1.57) 0.058 (1.47) 0.020 (0.51) 0.016 (0.41)
0.110 (2.79) 0.090 (2.29)
0.015 (0.38) MAX.
0.325 (8.25) 0.300 (7.62)
TYP. 0.010 (0.25)
0 15
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
11
X24C01
PACKAGING INFORMATION
8-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S
0.150 (3.80) 0.158 (4.00) PIN 1 INDEX
0.228 (5.80) 0.244 (6.20)
PIN 1
0.014 (0.35) 0.019 (0.49) 0.188 (4.78) 0.197 (5.00)
(4X) 7
0.053 (1.35) 0.069 (1.75)
0.050 (1.27)
0.004 (0.19) 0.010 (0.25)
0.010 (0.25) X 45 0.020 (0.50)
0 - 8 0.0075 (0.19) 0.010 (0.25) 0.027 (0.683) 0.037 (0.937)
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESIS IN MILLIMETERS)
3926 FHD F22
12
X24C01
PACKAGING INFORMATION
8-LEAD MINIATURE SMALL OUTLINE GULL WING PACKAGE TYPE M
0.118 0.002 (3.00 0.05) 0.012 + 0.006 / -0.002 (0.30 + 0.15 / -0.05) 0.0256 (0.65) TYP
R 0.014 (0.36)
0.118 0.002 (3.00 0.05)
0.030 (0.76) 0.0216 (0.55)
0.036 (0.91) 0.032 (0.81)
7 TYP
0.040 0.002 (1.02 0.05)
0.008 (0.20) 0.004 (0.10)
0.007 (0.18) 0.005 (0.13)
0.150 (3.81) REF. 0.193 (4.90) REF.
NOTE: 1. ALL DIMENSIONS IN INCHES AND (MILLIMETERS)
3003 ILL 01
13
X24C01
ORDERING INFORMATION
X24C01 Device X X -X VCC Limits Blank = 4.5V to 5.5V 3.5 = 3.5V to 5.5V 3 = 3.0V to 5.5V 2.7 = 2.7V to 5.5V Temperature Range Blank = Commercial = 0C to +70C I = Industrial = -40C to +85C M = Military = -55C to +125C Package P = 8-Lead Plastic DIP S = 8-Lead SOIC M = 8-Lead MSOP Part Mark Convention X24C01 X Blank = 8-Lead SOIC P = 8-Lead Plastic DIP M = 8-Lead MSOP
X
Blank = 4.5V to 5.5V, 0C to +70C F = 2.7V to 5.5V, 0C to +70C G = 2.7V to 5.5V, -40C to +85C I = 4.5V to 5.5V, -40C to +85C B = 3.5V to 5.5V, 0C to +70C C = 3.5V to 5.5V, -40C to +85C D = 3.0V to 5.5V, 0C to +70C E = 3.0V to 5.5V, -40C to +85C M = 4.5V to 5.5V, -55C to +125C
LIMITED WARRANTY
Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and prices at any time and without notice. Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, licenses are implied. U.S. PATENTS Xicor products are covered by one or more of the following U.S. Patents: 4,263,664; 4,274,012; 4,300,212; 4,314,265; 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829, 482; 4,874, 967; 4,883, 976. Foreign patents and additional patents pending. LIFE RELATED POLICY In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection and correction, redundancy and back-up features to prevent such an occurence. Xicor's products are not authorized for use in critical components in life support devices or systems. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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