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UVEPROM
Austin Semiconductor, Inc. 4 MEG UVEPROM
UV Erasable Programmable Read-Only Memory
AVAILABLE AS MILITARY SPECIFICATIONS
* SMD 5962-91752 * MIL-STD-883
SMJ27C040
PIN ASSIGNMENT (Top View)
32-Pin DIP (J) (600 MIL)
V PP A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Vcc A18 A17 A14 A13 A8 A9 A11 G\ A10 E\ DQ7 DQ6 DQ5 DQ4 DQ3
FEATURES
* Organized 524,288 x 8 * Single +5V 10% power supply * Industry standard 32-pin dual-in-line package * All inputs/outputs fully TTL compatible * Static Operation (no clocks, no refresh) * 8-bit output for use in microprocessor-based systems * Power-saving CMOS technology * 3-state output buffers * 400-mV DC assured noise immunity with standarad TTL loads * Latchup immunity of 250 mA on all input and output pins * No pullup resistors required * Low power dissipation (Vcc = 5.5V) PActive - 385 mW Worst Case PStandby - 0.55 mW Worst Case (CMOS-input levels)
Pin Name A0 - A18 DA0-DQ7 E\ G\ GND VCC
Function Address Inputs Inputs (programming)/Outputs Chip Enable Output Enable Ground 5V Supply
VPP 13V Power Supply* *Only in program mode.
GENERAL DESCRIPTION
The SMJ27C040 is a set of 4,194,304-bit, ultraviolet-light erasable, electrically programmable read-only memories (EPROMs). These devices are fabricated using CMOS technology for high speed and simple interface with MOS and bipolar circuits. All inputs (including program data inputs) can be driven by Series 54 TTL circuits. Each output can drive one Series 54 TTL circuit without external resistors. The data outputs are 3-state for connecting multiple devices to a common bus. The SMJ27C040 is offered in a 32-pin 600-mil dual-in-line ceramic package (J suffix) rated for operation from -55C to 125C. Since this EPROM operates from a single 5V supply (in the read mode), it is ideal for use in microprocessor-based systems. One other (13V) supply is needed for programming. All programming signals are TTL level. For programming outside the system, existing EPROM programmers can be used.
OPTIONS
* Timing 120ns access 150ns access * Package(s) Ceramic DIP (600mils)
MARKING
-12 -15
J
No. 114
* Operating Temperature Ranges M Military (-55oC to +125oC)
For more products and information please visit our web site at www.austinsemiconductor.com
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
1
UVEPROM
Austin Semiconductor, Inc. FUNCTIONAL BLOCK DIAGRAM*
EPROM 524,288 x 8 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 E\ G\ 12 11 10 9 8 7 6 5 27 26 23 25 4 28 29 3 2 30 31 22 24 0
SMJ27C040
A
0 524,287
A A A A A A A A
13 14 15 17 18 19 20 21
DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7
18 [PWR DWN] & EN
* This symbol is in accordance with ANSI/IEEE std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the J package.
OPERATION
The seven modes of operation are listed in Table 1. The read mode requires a single 5V supply. All inputs are TTL level except for VPP during programming (13V), and VH (12V)i on A9 for signature mode.
TABLE 1. OPERATION MODES
E\ Read Output Disable Standby Programming Program Inhibit Verify Signature Mode
* X can be VIL or VIH. iVH = 12V 0.5V
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
G\ VIL VIH X VIH VIH VIL VIL
VPP VCC VCC VCC VPP VPP VPP VCC
FUNCTION VCC A9 VCC VCC VCC VCC VCC VCC VCC X X X X X X VIH*
A0 X X X X X X VIL VIL
DQ0-DQ7 Data Out High-Z High-Z Data In High-Z Data Out MFG Code 97 Device Code 50
VIL VIL VIH VIL VIH VIH VIL
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UVEPROM
Austin Semiconductor, Inc.
READ/OUTPUT DISABLE
When the outputs of two or more SMJ27C040s are connected in parallel on the same bus, the output of any particular device in the circuit can be read with no interference from competing outputs of the other devices. To read the output of a single device, a low level signal is applied to the E\ and G\ pins. All other devices in the circuit should have their outputs disabled by applying a high level signal to one of these pins. Output data is accessed at pins Q0-Q7.
SMJ27C040
SNAP! PULSE PROGRAMMING
The SMJ27C040 is programmed by using the SNAP! Pulse programming algorithm. The programming sequence is shown in the SNAP! Pulse programming flow chart (Figure 1). The initial setup is VPP = 13V, VCC = 6.5V, E\ = V IH, and G\ = VIL. Once the initial location is selected, the data is presented in parallel (eight bits) on pins DQ1 through DQ8. Once addresses and data are stable, the programming mode is achieved when E\ is pulsed low (VIL) with a pulse duration of tW(PGM). Every location is programmed only once before going to interactive mode. In the interactive mode, the word is verified at VPP = 13V, VCC= 6.5V, E\ = VIH, and G\ = VIL. If the correct data is not read, the programming is performed by pulling G\ high, then E\ low with a pulse duration of tW(PGM). This sequence of verification and programming is performed up to a maximum of 10 times. When the device is fully programmed, all bytes are verified with VCC = VPP = 5V 10%.
LATCHUP IMMUNITY
Latchup immunity on the SMJ27C040 is a minimum of 250mA on all inputs and outputs. This feature provides latchup immunity beyond any potential transients at the P.C. board level when the EPROM is interfaced to industry standard TTL or MOS logic devices. The input/output layout approach controls latchup without compromising performance or packing density.
POWER DOWN
Active ICC supply current can be reduced from 70mA to 1mA for a high TTL input on E\ and to 100A for a high CMOS input on E\. In this mode all outputs are in the highimpedance state.
PROGRAM INHIBIT
Programming can be inhibited by maintaining high level inputs on the E\ and G\ pins.
ERASURE
Before programming, the SMJ27C040 EPROM is erased by exposing the chip through the transparent lid to a high intensity ultraviolet-light (wavelength 2537 A). The recommended minimum exposure dose (UV intensity x exposure time) is 15-W .s/cm 2. A typical 12-mW/cm 2, filterless UV lamp erases the device in 21 minutes. The lamp should be located about 2.5cm above the chip during erasure. After erasure, all bits are in the high state. It should be noted that normal ambient light contains the correct wavelength for erasure. Therefore, when using the SMJ27C040, the window should be covered with an opaque label. After erasure (all bits in logic high state), logic lows are programmed into the desired locations. A programmed low can be erased only by ultraviolet light.
PROGRAM VERIFY
Programmed bits can be verified with VPP = 13V when G\ = VIL, and E\ = VIH.
SIGNATURE MODE
The signature mode provides access to a binary code identifying the manufacturer and type. This mode is activated when A9 (pin 26) is forced to 12V. Two identifier bytes are accessed by toggling A0. All other addresses must be held low. The signature code for the SMJ27C040 is 9750. A0 low selects the manufacturer's code 97 (Hex), and A0 high selects the device code 50 (Hex), as shown in Table 2.
TABLE 2. SIGNATURE MODES
IDENTIFIER* MANUFACTURER CODE DEVICE CODE A0 VIL VIH DQ7 1 0 DQ6 0 1 DQ5 0 0 PINS DQ4 DQ3 1 1 0 0 DQ2 1 0 DQ1 1 0 DQ0 1 0 HEX 97 50
* E\ = G\ = VIL, A1 - A8 = VIL, A9 = VH, A10 - A18 = VIL, VPP = VCC.
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
3
UVEPROM
Austin Semiconductor, Inc.
SMJ27C040
FIGURE 1. SNAP! PULSE PROGRAMMING FLOW CHART
START Address = First Location VCC = 6.5V 0.25V, VPP = 13V 0.25V Program One Pulse = tW = 100s Increment Address Program Mode
Last Address?
No
Yes Address = First Location X=0 Program One Pulse = tW = 100s No Verify One Byte Pass Last Address?
Increment Address
Fail
X = X+1
X = 10?
Interactive Mode
No
Yes VCC = VPP = 5V 0.5V
Yes Device Failed
Compare All Bytes to Original Data
Fail
Final Verification
Pass Device Passed
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
4
UVEPROM
Austin Semiconductor, Inc.
ABSOLUTE MAXIMUM RATINGS* Supply Voltage Range, VCC**...........................-0.6V to +7.0V Supply Voltage Range, Vpp**.........................-0.6V to +14.0V Input Voltage Range, All inputs except A9**..-0.6V to +6.5V A9.....-0.6V to +13.0V Output Voltage Range, with respect to VSS**..................................-0.6V to VCC +1 Minimum Operating Free-air Temperature.....................-55C Maximum Operating Case Temperature.........................125C Storage Temperature Range.............................-65C to 150C
SMJ27C040
*Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. ** All voltage values are with respect to GND.
RECOMMENDED OPERATING CONDITIONS
VCC VPP VIH VIL TA TC Supply Voltage Supply Voltage Read Mode SNAP! Pulse programming algorithm Read Mode SNAP! Pulse programming algorithm TTL CMOS TTL CMOS
2 1
High-level input voltage Low-level input voltage Operating free-air temperature Operating case temperature
MIN 4.5 6.25 VCC-0.6 12.75 2 VCC-0.2 -0.5 -0.5 -55
TYP 5 6.5 13
MAX 5.5 6.75 VCC+0.6 13.25 VCC+0.5 VCC+0.5 0.8 0.2 +125
UNIT V V V V V V V V C C
NOTES: 1. VCC must be applied before or at the same time as VPP and removed after or at the same time as VPP. The deivce must not be inserted into or removed from the board when VPP or VCC is applied. 2. VPP can be connected to VCC directly (except in the program mode). VCC supply current in this case would be ICC + IPP. During programming, VPP must be maintained at 13V 0.25V.
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERATING FREE-AIR TEMPERATURE
VOH VOL II IO IPP1 IPP2 ICC1 PARAMETER High-level output voltage Low-level output voltage Input current (leakage) Output current (leakage) VPP supply current VPP supply current (during program pulse) VCC supply current (standby)
1
TEST CONDITIONS IOH = -400A IOL = 2.1mA VI = 0V to 5.5V VO = 0V to VCC VPP = VCC = 5.5V VPP = 12.75V, TA -25C VCC = 5.5V, E\=VIH E\=VIL, VCC=5.5V TTL-Input Level
MIN 2.4
MAX 0.4 1 1 10 50 1 100
UNIT V V A A A mA mA A
CMOS-Input Level VCC = 5.5V, E\=VCC tcycle = minimum cycle time, outputs open
2
ICC2
VCC supply current (active)
50
mA
NOTES: 1. This parameter is only sampled and not 100% tested. 2. Minimum cycle time = maximum access time.
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
5
UVEPROM
Austin Semiconductor, Inc.
SMJ27C040
CAPACITANCE OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERATING FREE-AIR TEMPERATURE, f = 1MHz (VCC = VPP = 5V 0.5V)*
PARAMETER Ci Co Input capacitance Output capacitance TEST CONDITIONS VI = 0V VO = 0V TYP** 4 8 MAX 8 12 UNIT pF pF
* Capacitance is sampled only at initial design and after any major change. ** All typical values are at TA = 25C and nominal voltages.
SWITCHING CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERATING FREE-AIR TEMPERATURE1,2
PARAMETER ta(A) ta(E) ten(G) tdis tv(A) Access time from address Access time from chip enable Output enable time from G\ Output disable time from G\ or E\, whichever occurs first Output data valid time after change of address, E\, or G\, whichever occurs first
1 1
TEST CONDITIONS
2, 3
-12 120 120
-15 150 150 50 0 0 50
MIN MAX MIN MAX
UNIT ns ns ns ns ns
(see Figure 2) Input tr < 20ns Input tf < 20ns 0 0
50 50
NOTES: 1. Value calculated from 0.5V delta to measured output level. This parameter is only sampled and not 100% tested. 2. Common test conditions apply for tdis except during programming. 3. For all switching characteristics the input pulse levels are 0.4V to 2.4V. Timing measurements are made at 2V for logic high and 0.8V for logic low. (Figure 2)
SWITCHING CHARACTERISTICS FOR PROGRAMMING: VCC = 6.5V and VPP = 13V (SNAP! Pulse), TA = 25C
tdis(G) ten(G) PARAMETER Output disable time from G\ Output enable time from G\ MIN 0 MAX 100 150 UNIT ns ns
TIMING REQUIREMENTS FOR PROGRAMMING
th(A) th(D) tsu(A) tsu(E) tsu(G) tsu(D) tsu(Vpp) tsu(Vcc)
SMJ27C040 Rev. 1.0 9/01
Hold Time, Address Hold Time, Data SNAP! Pulse Programming Algorithm
MIN 0 2 95 2 2 2 2 2 2
TYP
MAX
UNIT s s
tw(PGM) Pulse Duration, Program Setup Time, Address Setup Time, E\ Setup Time, G\ Setup Time, Data Setup Time, VPP Setup Time, VCC
100
105
s s s s s s s
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
6
UVEPROM
Austin Semiconductor, Inc.
PARAMETER MEASUREMENT INFORMATION
2.08V RL = 800 Output Under Test CL = 100 pF1
NOTES: 1. CL includes probe and fixture capacitance.
SMJ27C040
FIGURE 2. OUTPUT LOAD CIRCUIT AND INPUT/OUTPUT WAVE FORMS
FIGURE 3. READ-CYCLE TIMING
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
7
UVEPROM
Austin Semiconductor, Inc.
SMJ27C040
FIGURE 4. PROGRAM-CYCLE TIMING (SNAP! PULSE PROGRAMMING)
* 13V VPP and 6.5V VCC for SNAP! Pulse programming.
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
8
UVEPROM
Austin Semiconductor, Inc. MECHANICAL DEFINITION*
ASI Case #114 (Package Designator J) SMD 5962-91752, Case Outline X
SMJ27C040
D A
L L1
b e Pin 1 b1
E
b2 E1
SMD Specifications SYMBOL A b b1 b2 D E e E1 L1 L MIN --0.014 0.045 0.008 --0.510 0.100 BSC 0.600 BSC 0.125 0.015 0.200 0.070 MAX 0.225 0.026 0.065 0.018 1.680 0.620
NOTE: These dimensions are per the SMD. ASI's package dimensional limits may differ, but they will be within the SMD limits.
*All measurements are in inches.
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
9
UVEPROM
Austin Semiconductor, Inc.
SMJ27C040
ORDERING INFORMATION
EXAMPLE: SMJ27C040-15JM
Device Number SMJ27C040 SMJ27C040 Speed ns -12 -15 Package Operating Type Temp. J J * *
*AVAILABLE PROCESSES M = Extended Temperature Range
-55oC to +125oC
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
10
UVEPROM
Austin Semiconductor, Inc.
SMJ27C040
ASI TO DSCC PART NUMBER CROSS REFERENCE*
ASI Package Designator J
TI Part #** SMJ27C040-12JM SMJ27C040-15JM SMD Part # 5962-9175205MXA 5962-9175204MXA
* ASI part number is for reference only. Orders received referencing the SMD part number will be processed per the SMD. ** Parts are listed on SMD under the old Texas Instruments part number. ASI purchased this product line in November of 1999.
SMJ27C040 Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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