Features. ⢠Access time 250/350/450ns (max.) ⢠Single +5V ±1 0% power supply. ⢠TT L compatible inputs and outputs. ⢠Three-state outputs. General Description.
General Description The UM2333 is a 32,768-bit static MOS read only memory organized as 4096 words by 8 bits.
Programming of the device is accomplished by a custom
The device is com-
masking process.
The UM2333 is designed for memory
pletely static in operation, and operates from a single
applications where high performance, large bit storage,
+5V power supply. All inputs and outputs are TT L com-
and simple interfacing are important design objectives.
patible.
The two chip select inputs are programmable.
Pin Configuration
Block Diagram
vcc Au A7
VCC
A6
As
As
A9
A4
All
A3
CS1/CS1
A2
AlO
A1
CS2/CS2
Ao
07
00
06
01
Os
02
04
GND
03
Ao
GND
ADDRESS INPUT BUFFER X DECODER
32.768 BIT CELL MATRIX
1-6
Y
DECODER
y
CATING
OUTPUT ENABLE LOGIC
OUTPUT BUFFER
-
CS1/CS1
-
CS2/CS2
00 01 02 03 04 Os 06 07
eUMC
UM2333
Absolute Maximum Ratings*
*Comments o
Ambient temperature under bias, TA ..... -10 to +80 C
Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only. Functional operation of this device at these or any other conditions above those indicated in the operational sections of this specification is not implied and exposure to absolute maximum rating conditions for extended periods may affect device reliability.
o
Storage temperature, T STG ........... -65 to +150 C Applied voltage on any pin with respect to ground . . . . . . . . . . . . . . . . . -0.5 to +7V Power dissipation, PD . . . . . . . . . . . . . . . . . . . . . 1.0W
D.C. Electrical Characteristics (TA = 0 to 70°C, Vee = 5V ± 10% unless otherwise specified)
Limits Symbol
Parameter
Test Conditions
Units Min.
Typ.
Max.
VIL
Input low voltage
-.05
0.8
VIH
Input high voltage
2.0
Vee
V
VOL
Output low voltage
IOL =2.1mA
0.4
V
VOH
Output high voltage
IOH = -400J.LA
Vee
V
III
I nput load cu rrent
V 1N = Vee = 5.25V
10
J.LA
I LO
Output leakage current
V OUT = Vee = 5.25V
10
J.LA
100
mA
ICC
2.4
. Vee current
Capacitance (TA = 25°C
f = 1.0 MHz)
Limits Symbol
Parameter
Unit
Test Conditions Typ.
C1N COUT
Input capacitance Output capacitance
All pins except pin under tied to AC ground
Note: This parameter is periodically sampled and is not 100% tested.
1-7
Max. 7
pF
10
pF
UM2333 A.C. Electrical Characteristics (TA
= 0 to 70°C,
Vcc
= 5V±
10%) UM2333
UM2333-1
UM2333-2 Unit
Parameter
Symbol
Min.
Max.
Min.
Max.
Min.
Max.
Address access time 1
450
350
250
ns
tco
Output enable delay from CSl/CSl or CS 2 /CS 2
150
120
120
ns
tDF
Output disable delay from CSt/CSt or CS 2 /CS 2
0
100
ns
tOH
Output hold from address change
10
tACC
100
0
100
10
0
10
ns
Test Conditions Output load .............. 1 TTL load and 100pF I nput transition time . . . . . . . . . . . . . . . . . . . . . 20ns
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