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| 型號： | TMS27C020-20FME |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | READ-ONLY MEMORIES |
| 中文描述： | 只讀存儲器 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大小： | 206K |
| 代理商： | TMS27C020-20FME |
TMS27C020 262144 BY 8-BIT UV ERASABLE
TMS27PC020 262144 BY 8-BIT
PROGRAMMABLE READ-ONLY MEMORIES
SMLS020C – NOVEMBER 1990 – REVISED SEPTEMBER 1997
2
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
description (continued)
These devices are fabricated using power-saving CMOS technology for high speed and simple interface with
MOS and bipolar circuits. All inputs (including program data inputs) can be driven by Series 74 TTL circuits
without the use of external pullup resistors. Each output can drive one Series 74 TTL circuit without external
resistors.
The TMS27C020 EPROM is offered in a dual-in-line ceramic package (J suffix) designed for insertion in
mounting hole rows on 15,2-mm (600-mil) centers. The TMS27C020 is also offered with two choices of
temperature ranges of 0
°
to 70
°
C (JL suffix) and – 40
°
C to 85
°
C (JE suffix). See Table 1.
The TMS27PC020 is offered in a 32-lead plastic leaded chip carrier using 1,25 mm (50 mil) lead spacing
(FM suffix). The TMS27PC020 is offered with two choices of temperature ranges of 0
°
C to 70
°
C (FML suffix)
and – 40
°
C to 85
°
C (FME suffix). See Table 1.
Table 1. Temperature Range Suffixes
FUNCTION
SUFFIX FOR OPERATING
TEMPERATURE RANGES
0
°
C TO 70
°
C
JL
–40
°
C TO 85
°
C
JE
TMS27C040-XXX
TMS27PC040-XXX
FML
FME
These EPROMs operate from a single 5-V supply (in the read mode), they are ideal for use in
microprocessor-based systems. One other (13 V) supply is needed for programming. All programming signals
are TTL level. For programming outside the system, existing EPROM programmers can be used.
operation
The seven modes of operation for the TMS27C020 and TMS27PC020 are listed in Table 2. The read mode
requires a single 5-V supply. All inputs are TTL level except for V
PP
during programming (13 V), and V
H
(12 V) on
A9 for the signature mode.
Table 2. Operation Modes
MODE
FUNCTION
READ
OUTPUT
DISABLE
STANDBY
PROGRAMMING
VERIFY
PROGRAM
INHIBIT
SIGNATURE MODE
E
VIL
VIL
X
VIL
VIH
X
VIH
X
VIL
VIH
VIL
VPP
VCC
X
VIL
VIL
VIH
VPP
VCC
X
VIH
X
VIL
VIL
X
G
PGM
X
X
VPP
VCC
A9
X
VCC
VCC
X
VCC
VCC
X
VPP
VCC
X
VCC
VCC
VCC
X
VH
VIL
VH
VIH
A0
X
X
X
X
X
X
CODE
DQ0–DQ7
Data Out
Hi-Z
Hi-Z
Data In
Data Out
Hi-Z
MFG
DEVICE
97
32
X can be VIL or VIH
VH = 12 V
±
0.5 V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMS27C020-20FML | READ-ONLY MEMORIES |
| TMS27C020-20JE | READ-ONLY MEMORIES |
| TMS27C020-20JL | READ-ONLY MEMORIES |
| TMS27C020-25FME | READ-ONLY MEMORIES |
| TMS27C020-25FML | READ-ONLY MEMORIES |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS27C020-20FML | 制造商:TI 制造商全稱:Texas Instruments 功能描述:READ-ONLY MEMORIES |
| TMS27C020-20JE | 制造商:TI 制造商全稱:Texas Instruments 功能描述:READ-ONLY MEMORIES |
| TMS27C020-20JE4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EPROM |
| TMS27C020-20JL | 制造商:TI 制造商全稱:Texas Instruments 功能描述:READ-ONLY MEMORIES |
| TMS27C020-20JL4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EPROM |
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