SN74BCT2827CNT [TI]
10-BIT BUS/MOS MEMORY DRIVERS WITH 3-STATE OUTPUTS; 10位总线/带MOS存储器驱动器3态输出
| 型号： | SN74BCT2827CNT |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 10-BIT BUS/MOS MEMORY DRIVERS WITH 3-STATE OUTPUTS |
| 文件： | 总5页 (文件大小：76K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54BCT2827C, SN74BCT2827C
10-BIT BUS/MOS MEMORY DRIVERS
WITH 3-STATE OUTPUTS
SCBS007E – APRIL 1987 – REVISED NOVEMBER 1993
SN54BCT2827C . . . JT OR W PACKAGE
SN74BCT2827C . . . DW OR NT PACKAGE
(TOP VIEW)
• BiCMOS Design Substantially Reduces I
• Output Ports Have Equivalent 25-Ω
Resistors; No External Resistors Are
Required
CCZ
OE1
A1
V
CC
Y1
1
24
23
• Specifically Designed to Drive MOS DRAMs
2
A2
A3
A4
3
22 Y2
21 Y3
20 Y4
• 3-State Outputs Drive Bus Lines or Buffer
4
Memory Address Registers
5
• Flow-Through Architecture Optimizes
6
19
18
17
16
15
14
13
A5
A6
A7
A8
A9
A10
GND
Y5
Y6
Y7
Y8
Y9
Y10
OE2
PCB Layout
7
• Power-Up High-Impedance State
8
• ESD Protection Exceeds 2000 V Per
9
MIL-STD-883C, Method 3015
10
11
12
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
SN54BCT2827C . . . FK PACKAGE
(TOP VIEW)
description
These 10-bit buffers and bus drivers are
specifically designed to drive the capacitive input
characteristics of MOS DRAMs. They provide
high-performance bus interface for wide data
paths or buses carrying parity.
4
3
2 1 28 27 26
5
6
7
8
9
25
24
23
22
21
20
19
A3
A4
A5
NC
A6
A7
A8
Y3
Y4
Y5
NC
Y6
Y7
Y8
The 3-state control gate is a 2-input AND gate with
active-low inputs so if either output-enable (OE1
or OE2) input is high, all ten outputs are in the
high-impedance state. The outputs are also in the
high-impedance state during power-up and
power-down conditions. The outputs remain in the
high-impedance state while the device is powered
down.
10
11
12 13 14 15 16 17 18
NC-No internal connection
The SN54BCT2827C is characterized for opera-
tion over the full military temperature range of
–55°C to 125°C. The SN74BCT2827C is
characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUT
Y
OE1
L
OE2
L
A
L
L
H
Z
Z
L
L
H
X
X
H
X
X
H
Copyright 1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT2827C, SN74BCT2827C
10-BIT BUS/MOS MEMORY DRIVERS
WITH 3-STATE OUTPUTS
SCBS007E – APRIL 1987 – REVISED NOVEMBER 1993
†
logic symbol
logic diagram (positive logic)
1
OE1
&
1
13
OE1
OE2
EN
13
OE2
2
23
A1
Y1
2
23
22
21
20
19
18
17
16
15
14
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
Y10
1
3
4
5
To Nine Other Channels
6
7
8
9
10
11
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, NT, and W packages.
schematic of each output
V
CC
Output
GND
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT2827C, SN74BCT2827C
10-BIT BUS/MOS MEMORY DRIVERS
WITH 3-STATE OUTPUTS
SCBS007E – APRIL 1987 – REVISED NOVEMBER 1993
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
I
Voltage range applied to any output in the disabled or power-off state, V . . . . . . . . . . . . . . . –0.5 V to 5.5 V
O
Voltage range applied to any output in the high state, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
O
CC
Input clamp current, I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
IK
Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 mA
Operating free-air temperature range: SN54BCT2827C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
SN74BCT2827C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input negative-voltage rating may be exceeded if the input clamp current rating is observed.
recommended operating conditions
SN54BCT2827C
SN74BCT2827C
MIN NOM MAX
UNIT
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
IL
High-level input voltage
Low-level input voltage
Input clamp current
0.8
–18
–1
0.8
–18
–1
V
I
I
I
mA
mA
mA
°C
IK
High-level output current
Low-level output current
Operating free-air temperature
OH
OL
12
12
T
A
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54BCT2827C
SN74BCT2827C
PARAMETER
TEST CONDITIONS
UNIT
‡
‡
MIN TYP
MAX
MIN TYP
MAX
V
V
V
V
= 4.5 V,
I = –18 mA
–1.2
–1.2
V
V
IK
CC
I
= 4.5 V to 5.5 V,
I
I
I
= –1 mA
= 1 mA
= 12 mA
= 2.7 V
= 0.5 V
= 2 V
V
CC
–2
V
CC
–2
OH
CC
OH
OL
OL
0.15
0.35
0.5
0.8
20
0.15
0.35
0.5
0.8
20
V
OL
V
CC
= 4.5 V
V
I
I
I
I
I
I
I
I
I
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 5.5 V,
= 5.5 V,
= 4.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5 V,
V
V
V
µA
µA
OZH
O
O
O
–20
–20
OZL
50
50
mA
mA
µA
OL(sink)
V = 7 V
I
0.1
20
0.1
20
I
V = 2.7 V
I
IH
V = 0.5 V
I
–0.2
–112
40
–0.2
–112
40
mA
mA
mA
mA
pF
IL
§
V
O
= 2.25 V
–30
–30
O
Outputs open
Outputs open
28
3.8
5
28
3.8
5
CCL
CCZ
6
6
C
C
V = 2.5 V or 0.5 V
I
i
= 5 V,
V = 2.5 V or 0.5 V
I
8
8
pF
o
‡
§
All typical values are at V
= 5 V, T = 25°C.
A
CC
The output conditions have been chosen to produce a current that closely approximates one half of the true short circuit output current, I
.
OS
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT2827C, SN74BCT2827C
10-BIT BUS/MOS MEMORY DRIVERS
WITH 3-STATE OUTPUTS
SCBS007E – APRIL 1987 – REVISED NOVEMBER 1993
switching characteristics (see Note 2)
V
C
= 4.5 V to 5.5 V,
= 50 pF,
V
C
= 5 V,
= 50 pF,
CC
L
CC
L
R1 = 500 Ω,
R1 = 500 Ω,
R2 = 500 Ω,
T
A
FROM
(INPUT)
TO
(OUTPUT)
R2 = 500 Ω,
T
A
PARAMETER
UNIT
†
= MIN to MAX
= 25°C
′BCT2827C
SN54BCT2827C SN74BCT2827C
MIN
TYP
3.6
5.1
5.6
8.9
6.7
5.3
MAX
5.2
7.2
8
MIN
0.9
2
MAX
6.6
MIN
0.9
2
MAX
6
t
t
t
t
t
t
0.9
2
PLH
PHL
PZH
PZL
PHZ
PLZ
A
Y
Y
Y
ns
ns
ns
8.2
7.8
10.7
12.9
13
2.8
5
2.8
5
10.7
13.7
14
2.8
5
OE
OE
11
3.2
2.7
8.5
10.5
3.2
2.7
3.2
2.7
11
10
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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Copyright 1998, Texas Instruments Incorporated
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