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PY291A 2K X 8 REPROGRAMMABLE PROM
FEATURES
EPROM Technology for reprogramming High Speed - 20/25/35/50 ns (Commercial) - 35/50 ns (Military) Low Power Operation: 660 mW Single 5V10% Power Supply Windowed devices for reprogramming Fully TTL Compatible Inputs and Outputs Standard Pinout (JEDEC Approved) - 24-Pin 300 mil DIP - Windowed CERDIP - Non-Windowed CERDIP - Non-Windowed Plastic DIP
DESCRIPTION
The PY291A is a 2Kx8 CMOS PROM. The device is available in windowed packages which when exposed to UV light, the memory content in the PROM is erased and can be reprogrammed. EPROM technology is used in the memory cells for programming. The EPROM requires a 12.5V for programming. Devices are tested to insure that performance of the device meets the DC and AC specification limits after customer programming. To perform a read operation from the device, CS1 is LOW and CS2 and CS3 are HIGH. The memory contents in the address established by the Address pins (A0 to A10) will become available on the outputs (O0 to O7). The PY291A is available in 24-pin 300 mil Ceramic DIPs (CERDIP, Windowed and Non-Windowed) and Plastic DIPs (Non-Windowed).
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATION
DIP (P4, D4, WD1) Note: Window on WD1 package only
Document # EPROM101 REV OR 1 Revised June 2007
PY291A
MAXIMUM RATINGS(1)
Symbol VCC Parameter Power Supply Pin with Respect to GND Terminal Voltage with Respect to GND (up to 7.0V) Program Voltage Value -0.5 to +7 -0.5 to VCC +0.5 13 Unit V Symbol TA TBIAS V V TSTG PT IOUT Parameter Operating Temperature Temperature Under Bias Storage Temperature Power Dissipation DC Output Current Value -55 to +125 -55 to +125 -65 to +150 1.0 50 Unit C C C W mA
VTERM VPP
RECOMMENDED OPERATING CONDITIONS
Grade(2) Commercial Military Ambient Temp 0C to 70C -55C to +125C Gnd 0V 0V Vcc 5.0V 10% 5.0V 10%
CAPACITANCES(4)
(VCC = 5.0V, TA = 25C, f = 1.0MHz) Symbol CIN COUT Parameter Input Capacitance Conditions Typ. Unit VIN = 0V 10 10 pF pF
Output Capacitance VOUT= 0V
DC ELECTRICAL CHARACTERISTICS
Over recommended operating temperature and supply voltage(2) Symbol VIH VIL VHC VLC VOL VOH ILI ILO VPP IPP VIHP VILP Parameter Input High Voltage Input Low Voltage CMOS Input High Voltage CMOS Input Low Voltage Output Low Voltage (TTL Load) Output High Voltage (TTL Load) Input Leakage Current Output Leakage Current Programming Supply Voltage Programming Supply Current Input HIGH Programming Voltage Input LOW Programming Voltage 3.0 0.4 IOL = +16 mA, VCC = Min. IOH = -4 mA, VCC = Min. VCC = Max. VIN = GND to VCC VCC = Max., CE = VIH, VOUT = GND to VCC 2.4 -10 -10 12 +10 +10 13 50 Test Conditions PY291A Min Max 2.0 -0.5
(3)
Unit V V V V V V A A V mA V V
VCC 0.8 VCC +0.5 0.2 0.4
VCC -0.2 -0.5(3)
POWER DISSIPATION CHARACTERISTICS VS. SPEED
Symbol ICC Parameter Dynamic Operating Current* Temperature Range Commercial Military -20 120 N/A -25 90 N/A -35 90 90 -50 90 90 Unit mA mA
Document # EPROM101 REV OR
Page 2 of 9
PY291A
AC ELECTRICAL CHARACTERISTICS--READ CYCLE
(VCC = 5V 10%, All Temperature Ranges)(2)
Symbol t AA t HZCS1 t ACS1 t HZCS2 t ACS2 t PU t PD Parameter Address to Output Valid Chip Select Inactive to High Z Chip Select Active to Output Valid Chip Select Inactive to High Z Chip Select Active to Output Valid Chip Select Active to Power-Up Chip Slect Inactive to Power-Down 0 22 -20 Max 20 15 15 22 22 0 27 -25 Max 25 15 15 27 27 0 35 -35 Max 35 20 20 35 35 0 45 -50 Max 50 20 20 45 45 Unit ns ns ns ns ns ns ns
Min
Min
Min
Min
TIMING WAVEFORM OF READ CYCLE
Notes: 1. Stresses greater than those listed under 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 operational sections of this specification is not implied. Exposure to MAXIMUM rating conditions for extended periods may affect reliability.
2. Extended temperature operation guaranteed with 400 linear feet per minute of air flow. 3. Transient inputs with VIL and IIL not more negative than -3.0V and -100mA, respectively, are permissible for pulse widths up to 20 ns. 4. This parameter is sampled and not 100% tested.
Document # EPROM101 REV OR
Page 3 of 9
PY291A
DEVICE ERASURE
If the device is subjected to wavelengths of light below 4000 Angstroms, device erasure will commence. It is therefore recommended to use an opaque label over the window in the event the device will be exposed to lighting for a long time. The UV dose for erasure requires a wavelength of 2,537 Angstroms for a minimum dose of 25 Wsec/cm2. If using a UV lamp of 12 mW/cm2, the exposure time is estimated to be 35 minutes. Devices should be positioned within 1 inch of the lamp during the erasure process. Permanent damage can occur to the devices if exposed to UV light for an extended period of time.
MODE SELECTION
Pin Function Read or Output Disable Mode Other Read Output Disable Output Disable Output Disable Program Program Verify Program Inhibit Intelligent Program Blank Check Zeros
X = Don't Care
A10-A0 A10-A0 A10-A 0 A10-A 0 A10-A 0 A10-A 0 A10-A 0 A10-A 0 A10-A 0 A10-A 0 A10-A 0
CS3 PGM V IH X X VIL VILP VIHP VIHP VILP VIHP
CS2 VFY VIH X VIL X VIHP V ILP VIHP VIHP V ILP
CS 1 VPP V IL VIH X X VPP VPP VPP VPP VPP
O7-O0 D7-D0 O7-O0 High Z High Z High Z D7-D0 O7-O0 High Z D7-D0 Zeros
PROGRAMMING PINOUTS
Document # EPROM101 REV OR
Page 4 of 9
PY291A
AC TEST CONDITIONS
Input Pulse Levels Input Rise and Fall Times Input Timing Reference Level Output Timing Reference Level Output Load GND to 3.0V 3ns 1.5V 1.5V See Figures 1 and 2
Figure 1. Output Load
* including scope and test fixture. Note: Because of the ultra-high speed of the PY291A, care must be taken when testing this device; an inadequate setup can cause a normal functioning part to be rejected as faulty. Long high-inductance leads that
Figure 2. Thevenin Equivalent
cause supply bounce must be avoided by bringing the VCC and ground planes directly up to the contactor fingers. A 0.01 F high frequency capacitor is also required between VCC and ground.
Document # EPROM101 REV OR
Page 5 of 9
PY291A
ORDERING INFORMATION
SELECTION GUIDE
The PY291A is available in the following temperature, speed and package options.
Temperature Range Commercial Military Temperature Military Processed* Speed (ns) Package Plastic DIP Windowed CERDIP Non-Windowed CERDIP Windowed CERDIP Non-Windowed CERDIP 20 -20PC N/A N/A N/A N/A 25 -25PC N/A N/A N/A N/A 35 -35PC -35WM -35DM -35WMB -35DMB 50 -50PC -50WM -50DM -50WMB -50DMB
* Military temperature range with MIL-STD-883, Class B processing. N/A = Not Available
Document # EPROM101 REV OR
Page 6 of 9
PY291A
Pkg # # Pins Symbol A b b2 C D E eA e L Q S1
D4
24 (300 mil) Min Max 0.200 0.014 0.026 0.045 0.065 0.008 0.018 1.280 0.220 0.310 0.300 BSC 0.100 BSC 0.125 0.200 0.015 0.060 0.005 0 15
CERAMIC DUAL IN-LINE PACKAGE (NON-WINDOWED)
Pkg # # Pins Symbol A b b2 C D E eA e L Q S1 WD
WD1
24 (300 mil) Min Max 0.200 0.014 0.026 0.045 0.065 0.008 0.018 1.280 0.220 0.310 0.300 BSC 0.100 BSC 0.125 0.200 0.015 0.060 0.005 0 15 0.175
CERAMIC DUAL IN-LINE PACKAGE (WINDOWED)
Document # EPROM101 REV OR
Page 7 of 9
PY291A
Pkg # # Pins Symbol A A1 b b2 C D E1 E e eB L
P4
24 (300 Mil) Min Max 0.210 0.015 0.014 0.022 0.045 0.070 0.008 0.014 1.230 1.280 0.240 0.280 0.280 0.325 0.100 BSC 0.430 0.115 0.160 0 15
PLASTIC DUAL IN-LINE PACKAGE
Document # EPROM101 REV OR
Page 8 of 9
PY291A
REVISIONS
DOCUMENT NUMBER: DOCUMENT TITLE: REV. OR ISSUE DATE Jun-2007 EPROM101
PY291A 2K x 8 REPROGRAMMABLE PROM
ORIG. OF CHANGE JDB
DESCRIPTION OF CHANGE New Data Sheet
Document # EPROM101 REV OR
Page 9 of 9

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