TI SN64BCT240DW

SN64BCT240
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCBS049A – MAY 1990 – REVISED NOVEMBER 1993
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•
•
•
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DW OR N PACKAGE
(TOP VIEW)
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
3-State Outputs Drive Bus Lines or
Buffer-Memory Address Registers
ESD Protection Exceeds 2000 V
Per MIL-STD-883C Method 3015
High-Impedance State During Power-Up
and Power-Down
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (N)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
description
This octal buffer and line driver is designed specifically to improve both the performance and density of 3-state
memory address drivers, clock drivers, and bus-oriented receivers and transmitters. Taken together with the
SN64BCT241 and SN64BCT244, these devices provide the choice of selected combinations of inverting and
noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs.
The SN64BCT240 is organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When
OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
The SN64BCT240 is characterized for operation from –40°C to 85°C and 0°C to 70°C.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
Y
OE
A
L
H
L
L
L
H
H
X
Z
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3–1
SN64BCT240
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCBS049A – MAY 1990 – REVISED NOVEMBER 1993
logic symbol†
1OE
1A1
1A2
1A3
1A4
1
logic diagram (positive logic)
1
1OE
EN
2
18
4
16
6
14
8
12
1Y1
2
18
4
16
6
14
8
12
1A1
1Y2
1Y3
1A2
2OE
2A1
2A2
2A3
2A4
1Y2
1Y4
1A3
19
1Y1
1Y3
EN
11
9
13
7
15
5
17
3
1A4
1Y4
2Y1
2Y2
2Y3
19
2OE
2Y4
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
11
9
13
7
15
5
17
3
2A1
2A2
2A3
2A4
2Y1
2Y2
2Y3
2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC
Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°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.
3–2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN64BCT240
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCBS049A – MAY 1990 – REVISED NOVEMBER 1993
recommended operating conditions
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
IOH
IOL
TA
Operating free-air temperature
High-level input voltage
MIN
NOM
MAX
4.5
5
5.5
2
UNIT
V
V
0.8
V
Input clamp current
–18
mA
High-level output current
– 15
mA
Low-level output current
64
mA
85
°C
– 40
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VOL
IOZH
IOZL
TEST CONDITIONS
VCC = 4.5 V,
5V
VCC = 4
4.5
VCC = 4.75 V,
VCC = 4.5 V,
MIN
II = –18 mA
IOH = – 3 mA
2.4
3.3
IOH = – 15 mA
IOH = – 3 mA
2
3.1
2.7
IOH = 64 mA
VO = 2.7 V
VCC = 5.5 V,
VCC = 5.5 V,
TYP†
0.42
VO = 0.5 V
MAX
UNIT
–1.2
V
V
0.55
V
50
µA
– 50
µA
" 50
" 50
IOZ
VCC = 0 to 2.3 V (power up)
VCC = 1.8 V to 0 (power down)
7 V or 0
5 V,
V
VO = 2
2.7
0.5
II
IIH
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
0.1
20
µA
IIL
IOS‡
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.5 V
VO = 0
–1
mA
ICCL
ICCH
VCC = 5.5 V
VCC = 5.5 V
ICCZ
Ci
VCC = 5.5 V
VCC = 5 V,
08V
OE at 0.8
– 100
VI = 2.5 V or 0.5 V
VO = 2.5 V or 0.5 V
Co
VCC = 5 V,
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
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• DALLAS, TEXAS 75265
µA
mA
– 225
mA
19
31
mA
46
71
mA
6
9
mA
6
pF
11
pF
3–3
SN64BCT240
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCBS049A – MAY 1990 – REVISED NOVEMBER 1993
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A
Y
tPZH
tPZL
OE
Y
tPHZ
tPLZ
OE
Y
VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω
Ω,
TA = 25°C
POST OFFICE BOX 655303
TA = – 40°C
to 85°C
UNIT
TA = 0°C
to 70°C
MIN
MAX
MIN
MAX
MIN
MAX
0.5
4.8
0.5
6.4
0.5
5.6
0.4
3.5
0.4
4.5
0.4
4
1
7.9
1
9.2
1
8.8
1
9.4
1
10.8
1
10.5
1
6.8
1
8.5
1
8.1
1
8.1
1
10.6
1
9.5
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
3–4
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω
• DALLAS, TEXAS 75265
ns
ns
ns
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