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1CY 7C28 2A
CY7C281A CY7C282A
1K x 8 PROM
Features
* CMOS for optimum speed/power * High speed -- 25 ns (commercial) -- 30 ns (military) * Low power -- 495 mW (commercial) * * * * * * -- 660 mW (military) EPROM technology 100% programmable Slim 300-mil or standard 600-mil DIP or 28-pin LCC 5V 10% VCC, commercial and military TTL-compatible I/O Direct replacement for bipolar PROMs Capable of withstanding >2001V static discharge tical, but are packaged in 300-mil and 600-mil-wide packages respectively. The CY7C281A is also available in a 28-pin leadless chip carrier. The memory cells utilize proven EPROM floating-gate technology and byte-wide intelligent programming algorithms. The CY7C281A and CY7C282A are plug-in replacements for bipolar devices and offer the advantages of lower power, superior performance, and programming yield. The EPROM cell requires only 12.5V for the super voltage, and low current requirements allow for gang programming. The EPROM cells allow each memory location to be tested 100% because each location is written into, erased, and repeatedly exercised prior to encapsulation. Each PROM is also tested for AC performance to guarantee that after customer programming, the product will meet DC and AC specification limits. Reading is accomplished by placing an active LOW signal on CS1 and CS2, and active HIGH signals on CS3 and CS4. The contents of the memory location addressed by the address lines (A0 - A9) will become available on the output lines (O 0 - O7).
Functional Description
The CY7C281A and CY7C282A are high-performance 1024-word by 8-bit CMOS PROMs. They are functionally iden-
LogicBlockDiagram
A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 O4 COLUMN DECODER O3 O6 ROW DECODER PROGRAMMABLE ARRAY MULTIPLEXER O5 O7
Pin Configurations
DIP Top View
A7 A6 A5 A4 A3 A2 A1 A0 O0 O1 O2 GND 24 1 23 2 22 3 21 4 20 5 6 7C281A 19 7 7C282A 18 17 8 16 9 10 11 12 15 14 13 VCC A8 A9 CS1 CS2 CS3 CS4 O7 O6 O5 O4 O3 C281A-2
O2
LCC/PLCC Top View
4 3 2 1 28 27 26 25 5 24 6 23 7 7C281A 22 8 21 9 20 10 19 11 12 1314151617 18
O1
O0 CS1 CS2 CS3 CS4 C281A-1
A4 A3 A2 A1 A0 NC O0
CS1 CS2 CS3 CS4 NC O7 O6
C281A-3
Selection Guide
7C281A-25 7C282A-25 25 100 7C281A-30 7C282A-30 30 100 120 7C281A-45 7C282A-45 45 90 120
Maximum Access Time (ns) Maximum Operating Current (mA)
Commercial Military
Cypress Semiconductor Corporation
*
3901 North First Street
*
San Jose * CA 95134 * 408-943-2600 December 1992 - Revised December 1994
CY7C281A CY7C282A
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .....................................-65C to +150C Ambient Temperature with Power Applied..................................................-55C to +125C Supply Voltage to Ground Potential (Pin 24 to Pin 12).................................................-0.5V to +7.0V DC Voltage Applied to Outputs in High Z State .....................................................-0.5V to +7.0V DC Input Voltage .................................................-3.0V to +7.0V DC Program Voltage (Pins 18, 20)................................13.0V Static Discharge Voltage ........................................... >2001V (per MIL-STD-883, Method 3015) Latch-Up Current ..................................................... >200 mA
Operating Range
Range Commercial Industrial[1] Military[2] Ambient Temperature 0C to +70C -40C to +85C -55C to +125C VCC 5V 10% 5V 10% 5V 10%
Electrical Characteristics Over the Operating Range[3,4]
7C281A-25 7C282A-25 Parameter VOH VOL VIH VIL IIX IOZ IOS ICC Description Output HIGH Voltage Output LOW Voltage Input HIGH Level Input LOW Level Input Current Test Conditions VCC = Min., IOH = -4.0 mA VCC = Min., IOL = 16.0 mA Guaranteed Input Logical HIGH Voltage for All Inputs Guaranteed Input Logical LOW Voltage for All Inputs GND < VIN < VCC -10 -10 -20 2.0 0.8 +10 +10 -90 100 -10 -10 -20 Min. 2.4 0.4 2.0 0.8 +10 +10 -90 100 120 12 3.0 0.4 50 13 12 3.0 0.4 50 13 12 3.0 0.4 50 -10 -10 -20 Max. 7C281A-30 7C282A-30 Min. 2.4 0.4 2.0 0.8 +10 +10 -90 90 120 13 V V V mA Max. 7C281A-45 7C282A-45 Min. 2.4 0.4 Max. Unit V V V V A A mA mA
Output Leakage Current GND < VOUT < VCC, Output Disabled Output Short Circuit Current[5] Power Supply Current VCC = Max., VOUT = GND VCC = Max., IOUT = 0 mA Commercial Military
VPP VIHP VILP IPP
Program Voltage Program HIGH Voltage Program LOW Voltage Program Supply Current
Capacitance[4]
Parameter CIN COUT Description Input Capacitance Output Capacitance Test Conditions TA = 25C, f = 1 MHz, VCC = 5.0V Max. 10 10 Unit pF pF
Notes: 1. Contact a Cypress representative for industrial temperature range specifications. 2. TA is the "instant on" case temperature. 3. See the last page of this specification for Group A subgroup testing information. 4. See "Introduction to CMOS PROMs" in this Data Book for general information on testing. 5. For test purposes, not more than one output at a time should be shorted. Short circuit test duration should not exceed 30 seconds.
2
CY7C281A CY7C282A
AC Test Loads and Waveforms[4]
R1 250 5V OUTPUT 30pF INCLUDING JIG AND SCOPE R2 167 5V OUTPUT 5 pF INCLUDING JIG AND SCOPE THE VENIN EQUIVALENT 100 OUTPUT 2.0V
C281A-6
R1 250 3.0V R2 167 GND 5 ns ALL INPUT PULSES 90% 10% 90% 10% 5 ns
C281A-5
C281A-4
(a) Normal Load
Equivalent to:
(b) High Z Load
Switching Characteristics Over the Operating Range[3,4]
7C281A-25 7C282A-25 Parameter tAA tHZCS tACS Description Address to Output Valid Chip Select Inactive to High Z Chip Select Active to Output Valid Min. Max. 25 15 15 7C281A-30 7C282A-30 Min. Max. 30 20 20 7C281A-45 7C282A-45 Min. Max. 45 25 25 Unit ns ns ns
Switching Waveforms
A0 - A9 ADDRESS
CS3, CS4 CS1, CS2
SELECTED tAA
DESELECTED tHZCS
SELECTED tACS
O0 - O7 DATA
C281A-7
Programming Information
Programming support is available from Cypress as well as from a number of third party software vendors. For detailed
programming information, including a listing of software packages, please see the PROM Programming Information located at the end of this section. Programming algorithms can be obtained from any Cypress representative.
3
CY7C281A CY7C282A
Table 1. Mode Selection. Pin Function[6] Read or Output Disable Mode Read Output Disable Output Disable Output Disable Output Disable Program Program Verify Program Inhibit Intelligent Program Blank Check
Notes: 6. X = "don't care" but not to exceed VCC 5%.
A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0 A9 - A0
CS4 PGM VIH X X VIL X VILP VIHP VIHP VILP VIHP
CS3 VFY VIH X VIL X X VIHP VILP VIHP VIHP VILP
CS2 VPP VIL VIH X X X VPP VPP VPP VPP VPP
CS1 CS1 VIL X X X VIH VILP VILP VILP VILP VILP
O7 - O0 D7 - D0 O7 - O0 High Z High Z High Z High Z D7 - D0 O7 - O0 High Z D7 - D0 Zeros
Other
DIP Top View
A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND 24 1 23 2 22 3 21 4 20 5 7C281A 19 6 7C282A 18 7 17 8 16 9 15 10 14 11 12 13 VCC A8 A9 CS1 VPP VFY PGM D7 D6 D5 D4 D3
LCC/PLCC Top View
A4 A3 A2 A1 A0 NC D0
5 6 7 8 9 10 11
4 3 2 1 28 27 26 25 24 23 7C281A 22 21 20 19 1314151617 18 12
CS1 VPP VFY PGM NC D7 D6
C281A-9
C281A-8
Figure 1. Programming Pinouts.
4
CY7C281A CY7C282A
Typical DC and AC Characteristics
NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE 1.6 1.4 1.1 1.2 1.0 1.0 0.8 0.6 4.0 TA =25C f = fMAX 4.5 5.0 5.5 6.0 0.9 0.6 TA =25C 0.8 -55 25 125 0.4 4.0 4.5 5.0 5.5 6.0 0.8 1.0 1.2 NORMALIZED SUPPLY CURRENT vs. AMBIENT TEMPERATURE 1.2 NORMALIZED ACCESS TIME vs. SUPPLY VOLTAGE
SUPPLYVOLTAGE(V)
AMBIENT TEMPERATURE(C)
SUPPLYVOLTAGE(V)
NORMALIZED ACCESSTIME vs.TEMPERATURE 1.6 1.4 40 1.2 30 1.0 0.8 0.6 -55 125 20 10 0 25 AMBIENT TEMPERATURE (C) 60 50
OUTPUT SOURCE CURRENT vs. VOLTAGE 30.0 25.0 20.0 15.0 10.0 5.0 0 1.0 2.0 3.0 4.0 0.0
TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING
VCC =4.5V TA =25C 0 200 400 600 800 1000
OUTPUT VOLTAGE(V)
CAPACITANCE (pF)
OUTPUT SINK CURRENT vs. OUTPUT VOLTAGE 175 150 125 100 75 50 25 0 0.0 1.0 2.0 3.0 4.0 VCC =5.0V TA =25C 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88
I CC vs.CYCLE PERIOD
VCC =5.5V TA =25C
0
25
50
75
100
OUTPUT VOLTAGE (V)
CYCLE PERIOD (ns)
5
CY7C281A CY7C282A
Ordering Information
Speed (ns) 25 Ordering Code CY7C281A-25DC CY7C281A-25JC CY7C281A-25PC 30 CY7C281A-30DC CY7C281A-30JC CY7C281A-30PC CY7C281A-30DMB 45 CY7C281A-45DC CY7C281A-45JC CY7C281A-45PC CY7C281A-45DMB CY7C281A-45KMB Package Name D14 J64 P13 D14 J64 P13 D14 D14 J64 P13 D14 K73 Package Type 24-Lead (300-Mil) CerDIP 28-Lead Plastic Leaded Chip Carrier 24-Lead (300-Mil) Molded DIP 24-Lead (300-Mil) CerDIP 28-Lead Plastic Leaded Chip Carrier 24-Lead (300-Mil) Molded DIP 24-Lead (300-Mil) CerDIP 24-Lead (300-Mil) CerDIP 28-Lead Plastic Leaded Chip Carrier 24-Lead (300-Mil) Molded DIP 24-Lead (300-Mil) CerDIP 24-Lead Rectangular Cerpack Military Military Commercial Commercial Operating Range Commercial
Speed (ns) 25 30
Ordering Code CY7C282A-25PC CY7C282A-30PC CY7C282A-30DMB
Package Name P11 P11 D12 P11 D12
Package Type 24-Lead (600-Mil) Molded DIP 24-Lead (600-Mil) Molded DIP 24-Lead (600-Mil) CerDIP 24-Lead (600-Mil) Molded DIP 24-Lead (600-Mil) CerDIP
Operating Range Commercial Commercial Military Commercial Military
45
CY7C282A-45PC CY7C282A-45DMB
MILITARY SPECIFICATIONS Group A Subgroup Testing DC Characteristics
Parameter VOH VOL VIH VIL IIX IOZ ICC Subgroups 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 Document #: 38-00227-C tAA tACS
Switching Characteristics
Parameter Subgroups 7, 8, 9, 10, 11 7, 8, 9, 10, 11
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CY7C281A CY7C282A
Package Diagrams
24-Lead (600-Mil) CerDIP D12
MIL-STD-1835 D-3 Config-A
24-Lead (300-Mil) CerDIP D14
MIL-STD-1835 D-9 Config-A
28-Lead Plastic Leaded Chip Carrier J64
7
CY7C281A CY7C282A
Package Diagrams (continued)
24-Lead Rectangular Cerpack K73
MIL-STD-1835 F-Config-A
28-Square Leadless Chip Carrier L64
MIL-STD-1835 C-4
24-Lead (500-Mil) Molded DIP P11
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CY7C281A CY7C282A
Package Diagrams (continued)
24-Lead (300-Mil) Molded DIP P13/P13A
(c) Cypress Semiconductor Corporation, 1994. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.

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