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WS57C71C-55 Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer WS57C71C-55
Beschreibung HIGH SPEED 32K x 8 CMOS PROM/RPROM
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 2 Seiten
WS57C71C-55 Datasheet, Funktion
WS57C71C
MILITARY HIGH SPEED 32K x 8 CMOS PROM/RPROM
Ultra-Fast Access Time
— 45 ns
Low Power Consumption
Fast Programming
KEY FEATURES
Immune to Latch-UP
— Up to 200 mA
ESD Protection Exceeds 2000V
Available in 300 and 600 Mil DIP
and CLLCC
GENERAL DESCRIPTION
The WS57C71C is a High Performance 256K UV Erasable Electrically Re-Programmable Read Only Memory
(RPROM). It is manufactured in an advanced CMOS technology and utilizes WSI's patented self-aligned split gate
EPROM cell.
The industry standard PROM pin configuration of the WS57C71C provides an easy upgrade path from a 16K x 8
device.
This RPROM is capable of operating at speeds as fast as 35 ns address access time, which enables it to be used
directly with today's fast microprocessors and DSP processors without introducing any wait states. All inputs and
outputs are TTL compatible. The WS57C71C is a low power device even when operated at its fastest speed. The
DIP version is packaged in a 300 mil wide DIP package saving board space for the user.
MODE SELECTION
PINS CS1/
MODE
VPP CS2 CS3 VCC OUTPUTS
Read
VIL VIH VIL VCC DOUT
Output
Disable
VIH X
X VCC High Z
Output
Disable
X VIL X VCC High Z
Output
Disable
X X VIH VCC High Z
Program
Program
Verify
VPP X
VIH VCC
VIL VIH VIL VCC
DIN
DOUT
Program
Inhibit
VPP X
VIL VCC HIGH Z
PIN CONFIGURATION
TOP VIEW
Chip Carrier
CERDIP
A9 1
A6
4
5
3
2
1
32 31 30
29
A12
A8 2
A7 3
A5 6
28 A13
A6 4
A4
A3
A2
A1
A0
NC
O0
7 27
8 26
9 25
10 24
11 23
12 22
13 21
14 15 16 17 18 19 20
A14
NC
CS3
CS2
CS1/VPP
O7
O6
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
O0 11
O1 12
O2 13
O1 O2 NC O3 O4 O5
GND 14
28 VCC
27 A10
26 A11
25 A12
24 A13
23 A14
22 CS3
21 CS2
20 CS1/VPP
19 O7
18 O6
17 O5
16 O4
15 O3
PRODUCT SELECTION GUIDE
PARAMETER
Address Access Time (Max)
CS to Output Valid Time (Max)
WS57C71C-45
45 ns
20 ns
WS57C71C-55
55 ns
20 ns
WS57C71C-70
70 ns
30 ns
Return to Main Menu
4-13





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