CY7C245A-45WMB Cypress Semiconductor Corp, CY7C245A-45WMB Datasheet

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CY7C245A-45WMB

Manufacturer Part Number
CY7C245A-45WMB
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet

Specifications of CY7C245A-45WMB

Density
16Kb
Organization
2Kx8
Access Time (max)
25ns
Operating Current
120mA
Interface Type
Parallel
Package Type
Windowed CDIP
Operating Temperature Classification
Military
Operating Supply Voltage (typ)
5V
Operating Temp Range
-55C to 125C
Pin Count
24
Mounting
Through Hole
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Lead Free Status / RoHS Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CY7C245A-45WMB
Manufacturer:
CYP
Quantity:
5 737
Features
Selection Guide
Minimum Address Set-Up Time (ns)
Maximum Clock to Output (ns)
Maximum Operating
Current (mA)
Cypress Semiconductor Corporation
• Windowed for reprogrammability
• CMOS for optimum speed/power
• High speed
• Low power
• Programmable synchronous or asynchronous output
• On-chip edge-triggered registers
• Programmable asynchronous register (INIT)
• EPROM technology, 100% programmable
• Slim, 300-mil, 24-pin plastic or hermetic DIP
• 5V 10% V
• TTL-compatible I/O
• Direct replacement for bipolar PROMs
• Capable of withstanding greater than 2001V static dis-
enable
charge
— 15-ns address set-up
— 10-ns clock to output
— 330 mW (commercial) for -25 ns
— 660 mW (military)
Logic Block Diagram
E/E
INIT
CP
A
S
A
A
A
A
A
A
A
A
A
A
10
7
8
9
0
1
2
3
4
5
6
CC
, commercial and military
DECODER
ADDRESS
ADDRESS
ADDRESS
COLUMN
ROW
Standard
L
D
C
PROGRAMMABLE
Q
ARRAY
PROGRAMMABLE
Commercial
Military
Commercial
MULTIPLEXER
2K x 8 Reprogrammable Registered PROM
MULTIPLEXER
3901 North First Street
7C245A-15
120
15
10
Functional Description
The CY7C245A is a high-performance, 2K x 8, electrically pro-
grammable, read only memory packaged in a slim 300-mil
plastic or hermetic DIP. The ceramic package may be
equipped with an erasure window; when exposed to UV light
the PROM is erased and can then be reprogrammed. The
memory cells utilize proven EPROM floating-gate technology
and byte-wide intelligent programming algorithms.
The CY7C245A replaces bipolar devices and offers the advan-
tages of lower power, reprogrammability, superior perfor-
mance and high programming yield. The EPROM cell requires
only 12.5V for the supervoltage, and low current requirements
allow gang programming. The EPROM cells allow each mem-
ory location to be tested 100%, because each location is writ-
ten into, erased, and repeatedly exercised prior to encapsula-
tion. Each PROM is also tested for AC performance to
guarantee that after customer programming the product will
meet AC specification limits.
The CY7C245A has an asynchronous initialize function (INIT).
This function acts as a 2049th 8-bit word loaded into the on-chip
register. It is user programmable with any desired word, or may be
used as a PRESET or CLEAR function on the outputs. INIT is trig-
gered by a low level, not an edge.
7C245A-18
TRIGGERED
REGISTER
EDGE-
8-BIT
120
120
CP
18
12
C245A-1
San Jose
7C245AL-25
7C245A-25
O
O
O
O
O
O
O
O
120
7
6
5
4
3
2
1
0
25
12
90
60
PinConfigurations
August 1987 – Revised May 1994
GND
LCC/PLCC (Opaque only)
NC
O
A
A
A
A
A
O
O
O
A
A
A
A
A
A
A
A
4
3
2
1
0
0
CA 95134
7
6
5
4
3
2
1
0
0
1
2
7C245AL-35
5
6
7
8
9
10
11
7C245A-35
12
Top View
1
2
3
4
5
6
7
8
9
10
11
12
4
1314151617
Top View
3 2 1
DIP
120
35
15
90
60
28
24
23
22
21
20
19
18
17
16
15
14
13
27
18
26
CY7C245A
25
24
23
22
21
20
19
E/E
V
A
A
A
INIT
CP
O
O
O
O
O
CC
8
9
10
7
6
5
4
3
A
E/E
CP
NC
O
O
INIT
S
10
7
6
7C245AL-45
C245A-2
C245A-3
408-943-2600
S
7C245A-45
120
45
25
90
60

Related parts for CY7C245A-45WMB

CY7C245A-45WMB Summary of contents

Page 1

... Commercial Cypress Semiconductor Corporation Reprogrammable Registered PROM Functional Description The CY7C245A is a high-performance electrically pro- grammable, read only memory packaged in a slim 300-mil plastic or hermetic DIP. The ceramic package may be equipped with an erasure window; when exposed to UV light the PROM is erased and can then be reprogrammed. The memory cells utilize proven EPROM floating-gate technology and byte-wide intelligent programming algorithms ...

Page 2

... IN CC < + [5] = Max [6] =0.0V OUT = Max., Com’l 120 Mil 3.0 0.4 Test Conditions MHz 5. CY7C245A Ambient Temperature + +125 C 7C245A-25 7C245AL-25 7C245A-35 7C245AL-35 7C245A-45 7C245AL-45 Min. 2.4 2.4 2.4 0.4 0.4 2.0 V 2 0.8 0.8 10 +10 10 +10 10 Note 4 10 ...

Page 3

... LOW-to-HIGH transition of the clock. This unique feature allows the CY7C245A decoders and sense amplifiers to access the next location while previously addressed data remains stable on the outputs. ...

Page 4

... The on-chip register timing requirements are similar to those of discrete registers available in the market. The CY7C245A has an asynchronous initialize input (INIT). The initialize function is useful during power-up and time-out sequences and can facilitate implementation of other sophisticated functions such as a built-in “ ...

Page 5

... IHP ILP LCC/PLCC (Opaque Only) Top View VFY PGM 1314151617 C245A-8 Figure 1. Programming Pinouts. 5 CY7C245A [ INIT PGM VFY High Init. Byte ILP IHP IHP ILP High Z IHP IHP ILP IHP High Z ILP IHP ILP IHP Zeros IHP ILP VFY PGM 22 21 ...

Page 6

... TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING 30.0 25.0 20.0 15.0 10 5.0 V =4.5V CC 0.0 0 200 400 600 800 CAPACITANCE (pF) 6 CY7C245A CLOCK TO OUTPUT TIME vs 1.6 1.4 1.2 1.0 0 0.6 125 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) NORMALIZED SET-UP TIME vs. TEMPERATURE 1.6 1 ...

Page 7

... CY7C245A-45JC CY7C245A-45PC CY7C245A-45SC CY7C245A-45WC 120 CY7C245A-45DMB CY7C245A-45LMB CY7C245A-45QMB CY7C245A-45TMB CY7C245A-45WMB Notes: 10. Most of these products are available in industrial temperature range. Contact a Cypress representative for specifications and product availability. Package Type Package Type J64 28-Lead Plastic Leaded Chip Carrier P13 24-Lead (300-Mil) Molded DIP ...

Page 8

... CY7C245A-35DMB 5962-88735 033X CY7C245A-25LMB 5962-88735 04KX CY7C245A-25KMB 5962-88735 04LX CY7C245A-25DMB 5962-88735 043X CY7C245A-25LMB 5962-87529 01KX CY7C245A-45TMB 5962-87529 01LX CY7C245A-45WMB 5962-87529 013X CY7C245A-45QMB 5962-87529 02KX CY7C245A-35TMB 5962-87529 02LX CY7C245A-35WMB 5962-87529 023X CY7C245A-35QMB 5962-89815 01LX CY7C245A-35WMB 5962-89815 01KX CY7C245A-35TMB 5962-89815 013X ...

Page 9

... Package Diagrams 24-Lead (300-Mil) CerDIP D14 MIL-STD-1835 D-9 Config.A 28-Square Leadless ChipCarrier L64 MIL-STD-1835 C-4 28-Lead Plastic Leaded Chip Carrier J64 28-Pin Windowed Leadless Chip Carrier Q64 MIL-STD-1835 C-4 9 CY7C245A ...

Page 10

... Package Diagrams (Continued) 24-Lead (300-Mil) Molded DIP P13/P13A 24-Lead (300-Mil) Molded SOIC S13 10 CY7C245A ...

Page 11

... 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. MIL-STD-1835 D-9 Config.A CY7C245A ...

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