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PDF CDM53256 Data sheet ( Hoja de datos )
| Número de pieza | CDM53256 | |
| Descripción | CMOS 32768-Word by 8-Bit LSI Static ROM | |
| Fabricantes | GE | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CDM53256 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
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Read-Only Memories (ROMs) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
CDM53256
NC 28 VOO
AI2 27 AI4
A7 26 AI3
A6 4
25 A8
AS 5
24 A9
A4 6
23 All
A3
A2 8
22 <iE/OE
21 AIO
AI 9
20 CE/CE
AO 10
00 II
01 12
19 07
18 06
17 OS
02 13
16 04
VSS
14
15 03
TOP VIEW
92CS-36Z24
TERMINAL ASSIGNMENT
CMOS 32,768-Word by 8-Bit LSI Static ROM
Features:
• Asynchronous operation
• Fast access time - 250 ns max.
• Low standby and operating power-
IS8Y2 = 2/iA typical
IOPER> = 12 mA max. at te,e = 1 /is
= 36 mA max. at te,e = 250 ns
• Automatic power down
• Mask-programmable chip enable and output enable
• TTL input and output compatible
• 28-pin JEDEC standard pin out: Pin compatible with the 27256 EPROM
The RCA-COM53256 is a 262,144-bit asynchronous mask-
programmble, CMOS REAO-ONLY memory organized as
32,768 eight-bit words. The COM53256 is designed to be
used with a wide rangeof general-purpose microprocessor
systems, including the RCA COP1800 series system. One
chip enable input and an output enable function are
provided for memory expansion and output buffer control.
Chip enable (CE) gates the address and output buffers and
powers down the chip to the standby mode. The output
enable (OE) controls the output buffers to eliminate bus
contention. The polarities of the chip enable and the output
enable are user mask-programmble.
The COM53256 is supplied in 28-lead, hermetic, dual-in-
line side-brazed ceramic (0 suffix). in 28-lead dual-in-line
plastic (E suffix) and in 28-lead small-outline (SO) plastic
(M suffix) packages.
AI4
I
I
I
I
I 262,144 BIT
I ROM
I 'a": CELL ARRAY
A3 '"0"
0
..A2
"'"
''a'""":
"AI 0
AO
CE/CE
ACTIVITY
DETECTOR
(AUTO POWER)
DOWN
**OE/CE -----------------;
* MASK PROGRAMMABLE AS'
ACTIVE-HIGH OR ACTIVE- LOW OR DON'T CARE
** MASK PROGRAMMABLE AS
ACTlVE- HIGH OR ACTIVE-LOW
00 a' 02 03
Fig. 1 - Functional block diagram.
04 05
06 07
92.Cl'ot-36246
File Number 1453
722 _________________________________________________________________
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet CDM53256.PDF ] | |
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