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X28HT010 1M
X28HT010
High Temperature, 5 Volt, Byte Alterable E2PROM
128K x 8 Bit
FEATURES
DESCRIPTION
The Xicor X28HT010 is a 128K x 8 E2PROM, fabricated with Xicor's proprietary, high performance, floating gate CMOS technology which provides Xicor products superior high temperature performance characteristics. Like all Xicor programmable non-volatile memories the X28HT010 is a 5V only device. The X28HT010 features the JEDEC approved pinout for byte-wide memories, compatible with industry standard EPROMs. The X28HT010 supports a 256-byte page write operation, effectively providing a 19s/byte write cycle and enabling the entire memory to be typically written in less than 2.5 seconds. Xicor E2PROMs are designed and tested for applications requiring extended endurance. Data retention is specified to be greater than 100 years.
* *
*
175C Full Functionality Simple Byte and Page Write --Single 5V Supply --Self-Timed --No Erase Before Write --No Complex Programming Algorithms --No Overerase Problem Highly Reliable Direct WriteTM Cell --Endurance: 10,000 Write Cycles --Data Retention: 100 Years --Higher Temperature Functionality is Possible by Operating in the Byte Mode.
PIN CONFIGURATIONS
FLAT PACK CERDIP SOIC (R)
PGA
VBB A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O0 I/O1 I/O2 VSS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 X28HT010
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
VCC WE NC A14 A13 A8 A9 A11 OE A10 CE I/O7 I/O6 I/O5 I/O4 I/O3
6613 FHD F02
I/O0 I/O2 I/O3 I/O5 I/O6 15 17 19 21 22 A1 13 A2 12 A4 10 A6 A0 14 A3 11 A5 A7 CE I/O1 VSS I/O4 I/O7 16 18 20 23 24 A10 25 OE 26 A9 28 A13 30 A14 31
X28HT010
(BOTTOM VIEW)
9
A11 27 A8 29
8
7
6
A12
5
A15
NC 2 V BB
VCC NC 36 34 NC 1 WE 35
NC 32 NC 33
4
A 16
3
6613 FHD F21
(c) Xicor, Inc. 1991, 1995, 1996 Patents Pending 6613-1.5 8/5/97 T2/C0/D0 EW
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Characteristics subject to change without notice
X28HT010
PIN DESCRIPTIONS Addresses (A0-A16) The Address inputs select an 8-bit memory location during a read or write operation. Chip Enable (CE) The Chip Enable input must be LOW to enable all read/ write operations. When CE is HIGH, power consumption is reduced. Output Enable (OE) The Output Enable input controls the data output buffers and is used to initiate read operations. Data In/Data Out (I/O0-I/O7) Data is written to or read from the X28HT010 through the I/O pins. Write Enable (WE) The Write Enable input controls the writing of data to the X28HT010. Back Bias Voltage (VBB) It is required to provide -3V on pin 1. This negative voltage improves higher temperature functionality. FUNCTIONAL DIAGRAM PIN NAMES Symbol A0-A16 I/O0-I/O7 WE CE OE VBB VCC VSS NC Description Address Inputs Data Input/Output Write Enable Chip Enable Output Enable -3V +5V Ground No Connect
6613 PGM T01
A8-A16
X BUFFERS LATCHES AND DECODER
1M-BIT E2PROM ARRAY
A0-A7
Y BUFFERS LATCHES AND DECODER
I/O BUFFERS AND LATCHES
I/O0-I/O7 DATA INPUTS/OUTPUTS CE OE WE VCC VSS VBB
6613 FHD F01
CONTROL LOGIC AND TIMING
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X28HT010
DEVICE OPERATION Read Read operations are initiated by both OE and CE LOW. The read operation is terminated by either CE or OE returning HIGH. This two line control architecture eliminates bus contention in a system environment. The data bus will be in a high impedance state when either OE or CE is HIGH. Write Write operations are initiated when both CE and WE are LOW and OE is HIGH. The X28HT010 supports both a CE and WE controlled write cycle. That is, the address is latched by the falling edge of either CE or WE, whichever occurs last. Similarly, the data is latched internally by the rising edge of either CE or WE, whichever occurs first. A byte write operation, once initiated, will automatically continue to completion, typically within 5ms. Page Write Operation The page write feature of the X28HT010 allows the entire memory to be written in 5 seconds. Page write allows two to two hundred fifty-six bytes of data to be consecutively written to the X28HT010 prior to the commencement of the internal programming cycle. The host can fetch data from another device within the system during a page write operation (change the source address), but the page address (A8 through A16) for each subsequent valid write cycle to the part during this operation must be the same as the initial page address. The page write mode can be initiated during any write operation. Following the initial byte write cycle, the host can write an additional one to two hundred fifty-six bytes in the same manner as the first byte was written. Each successive byte load cycle, started by the WE HIGH to LOW transition, must begin within 100s of the falling edge of the preceding WE. If a subsequent WE HIGH to LOW transition is not detected within 100s, the internal automatic programming cycle will commence. There is no page write window limitation. Effectively the page write window is infinitely wide, so long as the host continues to access the device within the byte load cycle time of 100s. HARDWARE DATA PROTECTION The X28HT010 provides three hardware features that protect nonvolatile data from inadvertent writes.
* *
Default VCC Sense--All functions are inhibited when VCC is 3.4V. Write inhibit--Holding either OE LOW, WE HIGH, or CE HIGH will prevent an inadvertent write cycle during power-up and power-down, maintaining data integrity.
SYSTEM CONSIDERATIONS Because the X28HT010 is frequently used in large memory arrays it is provided with a two line control architecture for both read and write operations. Proper usage can provide the lowest possible power dissipation and eliminate the possibility of contention where multiple I/O pins share the same bus. It has been demonstrated that markedly higher temperature performance can be obtained from this device if CE is left enabled throughout the read and write operation. To gain the most benefit it is recommended that CE be decoded from the address bus and be used as the primary device selection input. Both OE and WE would then be common among all devices in the array. For a read operation this assures that all deselected devices are in their standby mode and that only the selected device(s) is outputting data on the bus. Because the X28HT010 has two power modes, standby and active, proper decoupling of the memory array is of prime concern. Enabling CE will cause transient current spikes. The magnitude of these spikes is dependent on the output capacitive loading of the I/Os. Therefore, the larger the array sharing a common bus, the larger the transient spikes. The voltage peaks associated with the current transients can be suppressed by the proper selection and placement of decoupling capacitors. As a minimum, it is recommended that a 0.1F high frequency ceramic capacitor be used between VCC and VSS at each device. Depending on the size of the array, the value of the capacitor may have to be larger. In addition, it is recommended that a 4.7F electrolytic bulk capacitor be placed between VCC and VSS for each eight devices employed in the array. This bulk capacitor is employed to overcome the voltage droop caused by the inductive effects of the PC board traces.
*
Noise Protection--A WE pulse less than 10ns will not initiate a write cycle.
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X28HT010
ABSOLUTE MAXIMUM RATINGS* Temperature under Bias X28HT010 ................................. -55C to +175C Voltage on any Pin with Respect to VSS ....................................... -1V to +7V D.C. Output Current ............................................. 5mA Lead Temperature (Soldering, 10 seconds) .............................. 300C *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.
RECOMMEND OPERATING CONDITIONS Temperature High Temp. Min. -40C Max. +175C
6613 PGM T02.2
Supply Voltages X28HT010 Back Bias Voltage: v
Limits 5V 5% -3V 10%
6613 PGM T03.1
D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions, unless otherwise specified.) Limits Symbol ICC Parameter VCC Current (Active) (TTL Inputs) VCC Current (Standby) (TTL Inputs) Input Leakage Current Output Leakage Current Input LOW Voltage Input HIGH Voltage Output LOW Voltage Output HIGH Voltage Back Bias Current Min. Max. 50 Units mA Test Conditions CE = OE = VIL, WE = VIH, All I/O's = Open, Address Inputs = .4V/2.4V Levels @ f = 5MHz CE = VIH, OE = VIL All I/O's = Open, Other Inputs = VIH VIN = VSS to VCC VOUT = VSS to VCC, CE = VIH
ISB1 ILI ILO VlL(1) VIH(1) VOL VOH IBB
3 20 20 0.6 VCC + 1 0.5 200
mA A A V V V V A
-1 2.2 2.6
IOL = 1mA IOH = -400A VBB = -3V 10%
6613 PGM T04.2
Notes: (1) VIL min. and VIH max. are for reference only and are not tested.
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X28HT010
POWER-UP TIMING Symbol tPUR(2) tPUW(2) Parameter Power-up to Read Operation Power-up to Write Operation Max. 100 5 Units s ms
6613 PGM T05
CAPACITANCE TA = +25C, f = 1MHz, VCC = 5V Symbol CI/O(2) CIN(2) Parameter Input/Output Capacitance Input Capacitance Max. 10 10 Units pF pF Test Conditions VI/O = 0V VIN = 0V
6613 PGM T06.1
ENDURANCE AND DATA RETENTION Parameter Endurance Data Retention A.C. CONDITIONS OF TEST Input Pulse Levels Input Rise and Fall Times Input and Output Timing Levels 0V to 3V 10ns 1.5V
6613 PGM T08.1
Min. 10,000 100 MODE SELECTION CE L L H X X OE L H X L X WE H L X X H
Max.
Units Cycles per Byte Years
6613 PGM T07
Mode Read Write Standby and Write Inhibit Write Inhibit Write Inhibit
I/O DOUT DIN High Z -- --
Power Active Active Standby -- --
6613 PGM T09
EQUIVALENT A.C. LOAD CIRCUIT
5V 1.92K OUTPUT 1.37K 100pF
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
6613 FHD F04.3
Note:
(2) This parameter is periodically sampled and not 100% tested.
5
X28HT010
A.C. CHARACTERISTICS (Over the recommended operating conditions, unless otherwise specified.) Read Cycle Limits X28HT010-20 X28HT010-25 Symbol tRC tCE tAA tOE tLZ(3) tOLZ(3) tHZ(3) tOHZ(3) tOH Parameter Read Cycle Time Chip Enable Access Time Address Access Time Output Enable Access Time CE LOW to Active Output OE LOW to Active Output CE HIGH to High Z Output OE HIGH to High Z Output Output Hold from Address Change Min. 200 200 200 50 0 0 50 50 0 0 0 50 50 0 Max. Min. 250 250 250 50 Max. Units ns ns ns ns ns ns ns ns ns
6613 PGM T10.2
Read Cycle
tRC ADDRESS tCE CE tOE OE VIH WE tOLZ tLZ DATA I/O HIGH Z DATA VALID tAA
6613 FHD F05
tOHZ tOH tHZ DATA VALID
Note:
(3) tLZ min.,tHZ, tOLZ min., and tOHZ are periodically sampled and not 100% tested. tHZ max. and tOHZ max. are measured, with CL = 5pF, from the point when CE or OE return HIGH (whichever occurs first) to the time when the outputs are no longer driven.
6
X28HT010
Write Cycle Limits Symbol tWC(4) tAS tAH tCS tCH tCW tOES tOEH tWP tWPH tDV tDS tDH tDW tBLC WE Controlled Write Cycle
tWC ADDRESS tAS tCS CE tAH tCH
Parameter Write Cycle Time Address Setup Time Address Hold Time Write Setup Time Write Hold Time CE Pulse Width OE HIGH Setup Time OE HIGH Hold Time WE Pulse Width WE HIGH Recovery Data Valid Data Setup Data Hold Delay to Next Write Byte Load Cycle
Min. 20 100 0 0 200 10 10 200 200
Max. 10
Units ms ns ns ns ns ns ns ns ns ns s ns ns s s
6613 PGM T11.1
1 100 25 10 0.4
100
OE tOES WE tDV DATA IN DATA VALID tDS DATA OUT HIGH Z tDH tWPH tWP tOEH
6613 FHD F06
Notes: (4) tWC 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 complete internal write operation.
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X28HT010
CE Controlled Write Cycle
tWC ADDRESS tAS CE tOES OE tOEH tCS WE tDV DATA IN DATA VALID tDS DATA OUT HIGH Z
6613 FHD F07
tAH tCW tWPH
tCH
tDH
Page Write Cycle
OE (5)
CE tWP WE tWPH ADDRESS * (6) tBLC
I/O BYTE 0 BYTE 1 BYTE 2 BYTE n BYTE n+1
LAST BYTE BYTE n+2 tWC
6613 FHD F08
*For each successive write within the page write operation, A8-A16 should be the same or writes to an unknown address could occur.
Notes: (5) Between successive byte writes within a page write operation, OE can be strobed LOW: e.g. this can be done with CE and WE HIGH to fetch data from another memory device within the system for the next write; or with WE HIGH and CE LOW effectively performing a polling operation. (6) The timings shown above are unique to page write operations. Individual byte load operations within the page write must conform to either the CE or WE controlled write cycle timing.
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X28HT010
PACKAGING INFORMATION
32-LEAD HERMETIC DUAL IN-LINE PACKAGE TYPE D
1.690 (42.95) MAX.
0.610 (15.49) 0.500 (12.70)
PIN 1 0.005 (0.13) MIN. 0.100 (2.54) MAX.
SEATING PLANE 0.150 (3.8) MIN.
0.232 (5.90) MAX.
0.060 (1.52) 0.015 (0.38)
0.200 (5.08) 0.150 (3.18) 0.110 (2.79) 0.090 (2.29) TYP. 0.018 (0.46)
0.065 (1.65) 0.033 (0.84) TYP. 0.055 (1.40)
0.023 (0.58) 0.014 (0.36) TYP. 0.018 (0.46)
0.620 (15.75) 0.590 (14.99) TYP. 0.614 (15.60)
0.015 (0.33) 0.008 (0.20)
0 15
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
3926 FHD F09
9
X28HT010
PACKAGING INFORMATION
32-LEAD CERAMIC FLAT PACK TYPE F
1.228 (31.19) 1.000 (25.40) PIN 1 INDEX 1 32 0.019 (0.48) 0.015 (0.38)
0.050 (1.27) BSC
0.830 (21.08) MAX.
0.045 (1.14) MAX. 0.005 (0.13) MIN.
0.007 (0.18) 0.004 (0.10)
0.488 0.430 (10.93)
0.120 (3.05) 0.090 (2.29)
0.370 (9.40) 0.270 (6.86) 0.347 (8.82) 0.330 (8.38) 0.030 (0.76) MIN 0.045 (1.14) 0.026 (0.66)
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
3926 FHD F20
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X28HT010
PACKAGING INFORMATION
36-LEAD CERAMIC PIN GRID ARRAY PACKAGE TYPE K
15
17
19
21
22 A 0.008 (0.20)
13
14
16
18
20
23
24
12
11
25
26 0.050 (1.27) A
10
9
27
28
NOTE: LEADS 5, 14, 23, & 32
8
7
29
30 TYP. 0.100 (2.54) ALL LEADS
6 TYP. 0.180 (.010) (4.57 .25) 4 CORNERS
5
2
36
34
32
31
4
3
1
35
33
TYP. 0.180 (.010) (4.57 .25) 4 CORNERS PIN 1 INDEX
0.120 (3.05) 0.100 (2.54) 0.072 (1.83) 0.062 (1.57)
0.770 (19.56) 0.750 (19.05) SQ 0.020 (0.51) 0.016 (0.41)
A
A
0.185 (4.70) 0.175 (4.45)
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
3926 FHD F21
11
X28HT010
PACKAGING INFORMATION
32-LEAD CERAMIC SMALL OUTLINE GULL WING PACKAGE TYPE R
0.060 NOM.
SEE DETAIL "A" FOR LEAD INFORMATION 0.020 MIN. 0.340 0.007 0.165 TYP. 0.015 R TYP.
0.035 TYP.
0.015 R TYP.
0.035 MIN.
DETAIL "A"
0.0192 0.0138
0.050" TYPICAL
0.050" TYPICAL 0.840 MAX. 0.750 0.005 0.560" TYPICAL
0.050
FOOTPRINT
0.030" TYPICAL 32 PLACES
0.440 MAX. 0.560 NOM.
NOTES: 1. ALL DIMENSIONS IN INCHES 2. FORMED LEAD SHALL BE PLANAR WITH RESPECT TO ONE ANOTHER WITHIN 0.004 INCHES
3926 FHD F27
12
X28HT010
ORDERING INFORMATION
X28HT010 Device
X
X
-X Access Time -25 = 250ns -20 = 200ns Temperature Range Blank = 25C to +175C Package D = 32-Lead Cerdip F = 32-Lead Flat Pack K = 36-Lead Pin Grid Array R = 32-Lead Ceramic SOIC
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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