DESCRIPTION INPUT PROTECTION
FULLY ENCODED, 9046 X N, RANDOM ACCESS
WRITE-ONLY-MEMORY
FINAL SPECIFICATION
25120
(10)
DESCRIPTION
The Signetics 25000 Series 9C46XN Random Access WriteOnly-Memory employs both enhancement and depletion mode
P-Channel, N-Channel and Neu(1) channel MOS devices.
Although a static device, a single TTL level clock phase is
required to drive the on-board multi-port clock generator. Data
refresh is accomplished during CB and LH periods (11). Quadristate outputs (when applicable) allow expansion in many
directions, depending on organization.
INPUT PROTECTION
All terminals are provided with slip-on latex protectors for the
prevention of Voltage Destruction. (PILL packaged devices do not
require protection.)
SILICON PACKAGING
Low cost silicon DIP packaging is implemented and reliability is
assured by the use of a non-hermetic sealing technique which
prevents the entrapment of harmful ions,, but which allows the free
exchange of friendly ions.
The static memory cells are operated dynamically to yield
extremely low power dissipation. All inputs and outputs are
directly TL compatible when proper interfacing circuitry is
employed.
SPECIAL FEATURES
Device construction is more or less S.O.S.(2)
Because of the employment of the Signetics’ proprietary
Sanderson-Rabbet Channel the 25120 will provide 50% higher
speed than you will obtain.
FEATURES
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•
•
•
•
•
•
•
•
•
•
FULLY ENCODED MULTI-PORT ADDRESSING
WRITE CYCLE TIME 80nS (MAX. TYPICAL)
WRITE ACCESS TIME(3)
POWER DISSIPATION 10µW/BIT TYPICAL
CELL REFRESH TIME 1mS (MIN. TYPICAL)
TTL/DTL COMPATIBLE INPUTS(4)
AVAILABLE OUTPUTS “n”
CLOCK LINE CAPACITANCE 2pF MAX.(5)
VCC = +10V
VDD = 0V ±2%
VFF = 6.3Vac(6)
COOLING
The 25120 is easily cooled by the employment of a six foot fan !”
from the package. If the device fails you have exceeded the
ragings. In such cases, more air is recommended.
Chip
Disable
Vcc
Vdd
Chip Destruct
Snooze
Alarm
Vff
115 Vac
A0
Address
Port A
APPLICATIONS
A0
A12
DON’T CARE BUFFER STORES
LEAST SIGNIFICANT CONTROL MEMORIES
POST MORTEM MEMORIES (WEAPON SYSTEMS)
ARTIFICIAL MEMORY SYSTEMS
NON-INTELLIGENT MICRO CONTROLLERS
FIRST-IN NEVER-OUT (FINO) ASYNCHRONOUS
BUFFERS.
OVERFLOW REGISTER (BIT BUCKET)
Address
Port B
25120 (9046 WOM)
A12
Drain
Data In
Data In
(out)
Clock In
W/W
On-Chip
Clock Gen
Clock Out
A0 - A5 Column Addresses
A6 - A12 Row Addresses
PROCESS TECHNOLOGY
The use of Signetics unique SEX(7) process yields Vth (var.) and
allows the design(8) and production(9) of higher performance
MOS circuits than can be obtained by competitor’s techniques.
PART IDENTIFICATION
TYPE “n” TEMP. RANGE PACKAGE
25120 0
0 to –70°C
Whatever’s
Right
BIPOLAR COMPATIBILITY
All data are clock input pins applicable output will interface
directly or nearly directly with bipolar circuits of suitable
characteristics in any event use 1 amp fuses in all power supply
and data lines.
1.
2.
3.
4.
5.
6.
“Neu” channel 16V CMOS enhances or depletes
regardless of gate polarity, either simultaneously or
randomly. Sometimes not at all.
“S.O.S” copyrighted U.S. Army Commissary, 1940.
Not applicable.
You can somehow drive these inputs from TTL, the method
is obvious.
Measure at 1MHz, 25mvac, 1.8pf in series.
For filaments, what else!
7.
You have a dirty mind. S.E.X. is a Signetics Extra Secret
process. “One Shovel Full to One Shovel Full”, patented by
Yagura, Kashkooli, Converse and AL, Circa 1921.
8. J. Kana calls it design (we humor him).
9. See “Modern Production Techniques” by T. Arrieta (not yet
written).
10. Final until we got a look at some actual parts.
11. Coffee breaks and lunch hours.
12. Due credit to EIMAC for inspiration.
SIGNETICS • 25120 FULLY ENCODED, 9046 X N, RANDOM ACCESS WRITE ONLY MEMORY
TYPICAL CHARACTERISTIC CURVES
Iff VS. Vff
BIT CAPACITY VS. TEMP.
5.0
10000
25120
GUARANTEE
9000
4.5
4.0
8000
3.5
7000
TYPICAL
3.0
Iff
BIT CAPACITY
6000
2.5
5000
TYPICAL
2.0
4000
1.5
TYPICAL
3000
1.0
2000
0.5
1000
0.0
0
5
10
0
-25
0
25
50
75
15
20
25
Vff
Vff (VOLTS AC)
100
TEMPERATURE (°C)
AQL VS. SELLING PRICE
30
27
10
25120
25120
24
18
1
SLOW PAYING
CUSTOMERS
15
AQL (%)
NUMBER OF REMAINING PINS
21
12
9
NORMAL
0.1
6
3
0
0
5
10
15
20
25
30
35
40
45
50
0.01
0.1
1
NUMBER OF SOCKET INSERTIONS
10
100
SELLING PRICE ($)
811 E. ARQUES AVENUE
•
SYNNYVALE CALIFORNIA
•
94086
TEL: (408) 739-7700 • TWX: (910) 339-9283 • A subsidiary of CORNING GLASS WORKS
D304 MOS-005-39
Copyright 1972 – printed in U.S.A.
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