WS57C45-25T STMicroelectronics, WS57C45-25T Datasheet

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WS57C45-25T

Manufacturer Part Number
WS57C45-25T
Description
Manufacturer
STMicroelectronics
Datasheet

Specifications of WS57C45-25T

Density
16Kb
Organization
2Kx8
Access Time (max)
25ns
Interface Type
Parallel
Package Type
CDIP
Operating Temperature Classification
Commercial
Operating Supply Voltage (typ)
5V
Operating Temp Range
0C to 70C
Pin Count
24
Mounting
Through Hole
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Lead Free Status / RoHS Status
Supplier Unconfirmed

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
WS57C45-25T
Manufacturer:
WSI
Quantity:
112
Part Number:
WS57C45-25T
Manufacturer:
WSI
Quantity:
20 000
PIN CONFIGURATION
The WS57C45 is an extremely High Performance 16K UV Erasable Registered CMOS RPROM. It is a direct
drop-in replacement for such devices as the AM27S45 and CY7C245.
To meet the requirements of systems which execute and fetch instructions simultaneously, an 8-bit parallel data
register has been provided at the output which allows RPROM data to be stored while other data is being
addressed.
An asynchronous initialization feature has been provided which enables a user programmable 2049th word to be
placed on the outputs independent of the system clock. This feature can be used to force an initialize word or
provide a preset or clear function.
A further advantage of the WS57C45 over Bipolar PROM devices is the fact that it utilizes a proven EPROM
technology. This enables the entire memory array to be tested for switching characteristics and functionality after
assembly. Unlike devices which cannot be erased, every WS57C45 RPROM in a windowed package is 100%
tested with worst case test patterns both before and after assembly.
PRODUCT SELECTION GUIDE
Ultra-Fast Access Time
— 25 ns Setup
— 12 ns Clock to Output
Low Power Consumption
Fast Programming
Programmable Synchronous or
Asynchronous Output Enable
HIGH-SPEED 2K x 8 REGISTERED CMOS PROM/RPROM
PARAMETER
Set Up Time (Max)
Clock to Output (Max)
Return to Main Menu
NC
O
A
A
A
A
A
4
3
2
1
0
0
5
6
7
8
9
10
11
O
A
12 13 14 15 16 17 18
4 3 2
1
5
O
A
Chip Carrier
6
2
GND
A
7
NC O
NC
1
GENERAL DESCRIPTION
V
28 27 26
CC
3
O
WS57C45-25
A
4
8
A
O
KEY FEATURES
9
25
24
23
22
21
20
19
5
25 ns
12 ns
A
INIT/V
OE/OE
CP/PGM
NC
O
O
TOP VIEW
10
7
6
PP
S
DESC SMD Nos. 5962-88735/5962-87529
Pin Compatible with AM27S45 and
CY7C245
Immune to Latch-UP
— Up to 200 mA
ESD Protection Exceeds 2000 V
Programmable Asynchronous Initialize
Register
CERDIP/Plastic DIP/
GND
O
O
O
A
A
A
A
A
A
A
A
7
6
5
4
3
2
1
0
0
1
2
Flatpack
WS57C45-35
1
2
3
4
5
6
7
8
9
10
11
12
35 ns
15 ns
24
23
22
21
20
19
18
17
16
15
14
13
V
A
A
A 10
INIT/V
OE/OE
CP/PGM
O
O
O
O
O
CC
8
9
7
6
5
4
3
PP
S
WS57C45-45
WS57C45
45 ns
25 ns
2-21

Related parts for WS57C45-25T

WS57C45-25T Summary of contents

Page 1

... This feature can be used to force an initialize word or provide a preset or clear function. A further advantage of the WS57C45 over Bipolar PROM devices is the fact that it utilizes a proven EPROM technology. This enables the entire memory array to be tested for switching characteristics and functionality after assembly ...

Page 2

... MIN MAX PWC t 12 SOE HOE PWI t 15 LZC t 15 HZC t 15 LZOE t 15 HZOE MIN MAX 0.4 2.4 Comm'l Industrial Military Comm'l Industrial Military –10 –10 MAX WS57C45-35 WS57C45-45 MIN MAX MIN MAX UNITS µA 10 µA UNITS pF pF UNITS ...

Page 3

... Timing measurements are made at 1.5 V for input and output transitions in both directions SOE HOE SOE HOE HOE PWC PWC PWC PWC PWC HZC LZC 8-BIT O 4 EDGE- TRIGGERED O 3 REGISTER TEST 1.5 1.5 POINTS HZOE LZOE WS57C45 2-23 ...

Page 4

... WS57C45 NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE 1.60 1.40 1.20 1.00 0.80 0.60 4.0 4.5 5.0 SUPPLY VOLTAGE ( V ) NORMALIZED T aa vs. AMBIENT TEMPERATURE 1.6 1.4 1.2 1.0 0.8 0.6 -55 -35 - AMBIENT TEMPERATURE ( °C ) 2-24 5.5 6 105 125 TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING 40 ...

Page 5

... Initialization Byte Programming The WS57C45 has a 2049th byte of data that can be used to initialize the value of the data register. This byte contains the value “0” when it is shipped from the factory. The user must program the 2049th byte with a value other than “ ...

Page 6

... Clocking CP/PGM once more from V impedance state. Blank Check Upon delivery from WaferScale Integration, Inc. or after each erasure (see Erasure section), the WS57C45 has all 2048 bytes in the ‘0’ state. “1’s” are loaded into the WS57C45 through the procedure of programming. MODE ...

Page 7

... FIGURE 5. PROM PROGRAMMING WAVEFORMS ADDRESS DATA V INIT CP/PGM (OE/OE )/ VFY S FIGURE 6. INITIAL BYTE PROGRAMMING WAVEFORMS DATA INIT CP/PGM V IL FIGURE 7. PROGRAM SYNCHRONOUS ENABLE CP/PGM (OE /OE )/ VFY INIT PROGRAM VERIFY V IH ADDRESS STABLE DATA IN DATA OUT PROGRAM DATA PROGRAM OTHER BYTES WS57C45 2-27 ...

Page 8

... WS57C45 PROGRAMMING INFORMATION DC CHARACTERISTICS SYMBOLS Input Leakage Current Supply Current During Programming Pulse I V Supply Current Input Low Voltage IL V Input High Voltage IH Output Low Voltage During Verify mA) OL Output High Voltage During Verify –4 mA) OH NOTE must not be greater than 14 volts including overshoot. ...

Page 9

... ORDERING INFORMATION SPEED PART NUMBER (ns) WS57C45-25T 25 * WS57C45-35KMB 35 WS57C45-35S 35 WS57C45-35T 35 * WS57C45-35TMB 35 * WS57C45-45KMB 45 * WS57C45-45TMB 45 NOTE: The actual part marking will not include the initials "WS." * SMD product. See section 4 for DESC SMD numbers. PROGRAMMING/ALGORITHMS/ERASURE/PROGRAMMERS The WS57C45 is programmed using Algorithm A shown on page 5-3. ...

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