STATIC RAM. UPD2149-1 Datasheet

UPD2149-1 RAM. Datasheet pdf. Equivalent


NEC UPD2149-1
NEe Microcomputers, Inc.
NEe
JJ. PD2149
JJ. PD2149-1
po PD2149-2
~rn~[~~~~illrnW
4096 (1024x4) BIT STATIC RAM
DESCR IPTION
The JlPD2149 is a 4096-bit static Random Access Memory organized as 1024 words
bv 4-bits. Using a scaled NMOS technology, it incorporates an innovative design
approach which provides the ease-of-use features associated with non-clocked static
memories.
The JlPD2149 is encapsulated in an 18-pin ceramic package configured with the
industry standard pinout. It is directly TTL compatible in all respects: inputs, out-
puts, and a single +5V supply. The data is read out non-destructively and has the
same polarity as the input data.
FEATU RES
Completely Static Memory - No Clock or Timing Strobe Required
• Equal Access and Cycle Times, Faster Chip Select Access
• Single +5V Supply
• High Density 18-Pin Package
• Directly TTL Compatible - All Inputs and Outputs
• Common Input and Output
• Three-State Output
• Access Time: 35-55 ns MAX (From Address)
15-25 ns MAX (From Chip Select)
• Power Dissipation: 180 mA MAX
II
A6
A5
A4
A3
AO
A1
A2,
cs
GND
Vee
A7
AS
Ag
I/O,
1/02
1/03
1/04
WE
PIN NAMES
AO-Ag
Address Inputs
WE Write Enable
es ehip Select
1/0,-1/04 Data Input/Output
Vee
Power (+5V)
GND
Ground
TRUTH TABLE
es WE
HX
LL
LH
MODE
I/O
Not Selected High Z
Write
Read
DIN
DOUT
71


UPD2149-1 Datasheet
Recommendation UPD2149-1 Datasheet
Part UPD2149-1
Description 4096 (1024 x 4) BIT STATIC RAM
Feature UPD2149-1; NEe Microcomputers, Inc. NEe JJ. PD2149 JJ. PD2149-1 po PD2149-2 ~rn~[~~~~illrnW 4096 (1024x4) BIT.
Manufacture NEC
Datasheet
Download UPD2149-1 Datasheet




NEC UPD2149-1
J.L PD2149
CAPACITANCE
Ta = 25°C; f = 1.0 MHz G)
PARAMErER
LIMITS
SYMBOL MIN TYP MAX
UNIT TEST CONDITIONS
Input Capacitance
Output Capacitance
CIN
COUT
5 pF
7 pF
VIN = OV
VOUT = OV
AC TEST CONDITIONS
Note: G) This parameter is sampled and not 100% tested.
Input Pulse Levels .................. .
Input Rise and Fall Times ............ .
Input and Output Timing Reference Levels ..
Output Load ..................... .
· . Gnd to 3.0V
· ...... 5 ns
...... 1.5V
· . See Figure 1
AC CHARACTE RISTICS
READ CYCLE (!)
Ta =o°c to +70°C; VCC =+5V ± 10%, unless otherwise noted.
PARAMETER
2149·2
2149·1
2149
SYMBOL MIN MAX MIN MAX MIN MAX
Read Cycle Time
Access Time
Chip Selection
to Output Valid
Chip Selection
to Output Active
Output 3~State
From Deselection
Output Hold From
Address Change
TRC
TA
TCO
Tcx
TOTD
TOH
35
35
15
a
10
0
45
45
20
0
15
0
55
55
25
0
20
0
TEST
UNIT CONDITIONS
ns
ns
ns
ns
ns @
ns
VCC
510fl
D O U T - - - - - . - - - - - -_ _~
330n
30 pF
(INCLUDING
SCOPE AND
JIG)
Figure 1
+5V
510 fl
DOUT--------~--__.
330fl
30 pF
(INCLUDING
SCOPE AND
JIG)
Figure 2
Notes:
CD WE is high for read cycle.
~ Transition is measured ±500 MV from steady state with load of Figure 2. This parameter
is sampled and not 100% tested.
72



NEC UPD2149-1
JJ. PD2149
A5----------~~>
AS ---------i~
A7----------~~·
ROW
SELECT
AS------t2.-,
A9----------~~~
••
MEMORY ARRAY
64 ROWS
64 COLUMNS
BLOCK DIAGRAM
- - - VCC
- - - GND
INPUT
DATA
1/03 _ _-t-I-++-D___-iCONTRO L
COLUMN 1/0 CIRCUITS
II
WE------OL__--'
Operating Temperature
Storage Temperature.
Voltage on Any Pin ..
DC Output Current ..
Power Dissipation ...
Note: CD with respect to ground
. -10°C to +85°C
-65°C to +150°C
-O.5Vto+7V CD
..20mA
... 1.2W
ABSOLUTE MAXIMUM
RATINGS*
COMMENT: Stress above those listed under "Absolute Maximum Ratings" may cause permanent
damage to the device. This is a stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
*Ta ~ 25°C
Ta = aOe to +70°C; Vee =' +5V:±- 10%, unless otherwise noted.
PARAMETER
SYMBOL MIN MAX UNIT TEST CONDITIONS
Input Leakage Current
Ouput Leakage Current
Power Supply Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output Short Circuit
Current
III
ILO
ICC
VIL
VIH
VOL
VOH
lOS
-10 +10
p.A
-50 +50
p.A
180 MA
-0.5
0.8 V
2.0 Vce
0.4
V
V
2.4 V
TBD TBD MA
VIN ~ GND to VCC
es ~ VIH
VOUT ~ GND to 4.5V
VIN - Vec. 1/0 - open
10L 8 MA
10H ~-4 MA
VOUT ~ GND to VCC
-
DC CHARACTERISTICS
Note: The operating temperature range is guaranteed with transverse air flow exceed-
ing 400 feet per minute.
73







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