74LCX16240 [STMICROELECTRONICS]
Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs; 低压CMOS 16位总线缓冲器（三态） ，容许5V输入和输出
| 型号： | 74LCX16240 |
| 厂家： | 
ST |
| 描述： | Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs |
| 文件： | 总15页 (文件大小：239K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74LCX16240
Low voltage CMOS 16-bit bus buffer (3-state)
with 5V tolerant inputs and outputs
Features
■ 5V tolerant inputs and outputs
■ High speed:
– t = 4.5ns (Max) at V = 3V
PD
CC
■ Power down protection on inputs and outputs
■ Symmetrical output impedance:
TSSOP48
– |I | = I = 24mA (Min) at V = 3V
OH
OL
CC
■ PCI bus levels guaranteed at 24mA
■ Balanced propagation delays:
Description
– t
≅ t
PHL
PLH
The 74LCX16240 is a low voltage CMOS 16 BIT
BUS BUFFER fabricated with sub-micron silicon
gate and double-layer metal wiring C MOS
■ Operating voltage range:
2
– V (Opr) = 2.0V to 3.6V
CC
technology. It is ideal for low power and high
speed 3.3V applications; it can be interfaced to
5V signal environment for both inputs and
outputs.
■ Pin and function compatible with
74 series 16240
■ Latch-up performance exceeds
500mA (JESD 17)
Any nG output control governs four BUS
BUFFERS. Output Enable input (nG) tied together
gives full 16-bit operation.
■ ESD performance:
– HBM > 2000V
(MIL STD 883 method 3015); MM > 200V
When nG is LOW, the outputs are on. When nG is
HIGH, the output are in high impedance state.
This device is designed to be used with 3 state
memory address drivers, etc.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
Order codes
Part number
Package
TSSOP48
Packaging
74LCX16240TTR
Tape and reel
February 2007
Rev 5
1/15
www.st.com
15
Contents
74LCX16240
Contents
1
2
Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
2.2
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3
4
Logic states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
6
7
8
9
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
74LCX16240
Logic symbols and I/O equivalent circuit
1
Logic symbols and I/O equivalent circuit
Figure 1. IEC logic symbols
Figure 2. Input and output equivalent circuit
3/15
Pin settings
74LCX16240
2
Pin settings
2.1
Pin connection
Figure 3. Pin connection (top through view)
4/15
74LCX16240
Logic states
2.2
Pin description
Table 1. Pin description
Pin N°
Symbol
1G
Name and function
Output enable input
1
2, 3, 5, 6
1Y1 to 1Y4
2Y1 to 2Y4
3Y1 to 3Y4
4Y1 to 4Y4
4G
Data outputs
8, 9, 11, 12
13, 14, 16, 17
19, 20, 22, 23
24
Data outputs
Data outputs
Data outputs
Output enable input
Output enable input
Data outputs
25
3G
30, 29, 27, 26
36, 35, 33, 32
41, 40, 38, 37
47, 46, 44, 43
48
4A1 to 4A4
3A1 to 3A4
2A1 to 2A4
1A1 to 1A4
2G
Data outputs
Data outputs
Data outputs
Output enable input
4, 10, 15, 21, 28, 34, 39,
45
GND
VCC
Ground (0V)
7, 18, 31, 42
Positive supply voltage
3
Logic states
3.1
Truth table
Table 2. Truth table
Inputs
Output
G
L
An
L
Yn
H
L
L
H
H
X
Z
Note:
X : Do not care
Z : High impedance
5/15
Maximum rating
74LCX16240
4
Maximum rating
Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. these are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. exposure to absolute maximum rating conditions for
extended periods may affect device reliability. refer also to the STMicroelectronics sure
program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol
Parameter
Value
Unit
V
VCC
Supply voltage
-0.5 to +7.0
-0.5 to +7.0
-0.5 to +7.0
-0.5 to VCC + 0.5
VI
VO
VO
IIK
DC input voltage
V
DC output voltage (OFF state)
V
DC output voltage (high or low state) (1)
DC input diode current
V
-50
-50
mA
mA
mA
mA
mA
°C
°C
DC output diode current (2)
DC output current
IOK
IO
±50
ICC
IGND
Tstg
TL
DC supply current per supply pin
DC ground current per supply pin
Storage temperature
± 100
± 100
-65 to +150
300
Lead temperature (10 sec)
1. IO absolute maximum rating must be observed
2. VO < GND
4.1
Recommended operating conditions
Table 4. Recommended operating conditions
Symsbol
Parameter
Value
2.0 to 3.6
0 to 5.5
0 to 5.5
0 to VCC
Unit
V
Supply voltage (1)
Input voltage
VCC
VI
V
VO
VO
Output voltage (OFF state)
V
Output voltage (high or low state)
V
IOH, IOL High or low level output current (VCC = 3.0 to 3.6V)
OH, IOL High or low level output current (VCC = 2.7V)
± 24
± 12
mA
mA
°C
ns/V
I
Top
Operating temperature
Input rise and fall time (2)
-40 to 85
0 to 10
dt/dv
1. Truth table guaranteed: 1.5V to 3.6V
2. VIN from 0.8V to 2V at VCC = 3.0V
6/15
74LCX16240
Electrical characteristics
5
Electrical characteristics
Table 5. DC specifications
Test condition
Value
-40 to 85°C
Symbol
Parameter
Unit
VCC
(V)
Min
Max
VIH
VIL
High level input voltage
Low level input voltage
2.0
V
V
2.7 to 3.6
0.8
IO = -100µA
IO = -12mA
IO = -18mA
IO = -24mA
IO = 100µA
IO = 12mA
IO = 16mA
IO = 24mA
VI = 0 to 5.5V
VCC-0.2
2.2
2.7 to 3.6
2.7
VOH
High level output voltage
V
V
2.4
3.0
2.2
2.7 to 3.6
2.7
0.2
0.4
VOL
Low level output voltage
Input leakage current
0.4
3.0
0.55
± 5
II
2.7 to 3.6
0
µA
µA
Power OFF leakage
current
Ioff
VI or VO = 5.5V
10
VI = VIH or VIL
VO = 0 to VCC
High impedance output
leakage current
IOZ
2.7 to 3.6
± 5
µA
VI = VCC or GND
VI or VO = 3.6 to 5.5V
VIH = VCC - 0.6V
20
ICC
Quiescent supply current 2.7 to 3.6
I incr. per Input 2.7 to 3.6
µA
µA
± 20
500
∆ICC
Table 6. Dynamic switching characteristics
Test condition
Value
TA = 25 °C
Symbol
Parameter
Unit
VCC
(V)
Min Typ Max
VOLP
VOLV
CL = 50pF
VIL = 0V, VIH = 3.3V
0.8
Dynamic low level quiet
output (1)
3.3
V
-0.8
1. Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to
HIGH. The remaining output is measured in the LOW state.
7/15
Electrical characteristics
74LCX16240
Table 7. AC electrical characteristics
Test condition
Value
-40 to 85 °C
Symbol
Parameter
Unit
ns
VCC
(V)
CL
RL
ts = tr
(ns)
(pF)
(Ω)
Min
1.5
1.5
1.5
1.5
1.5
1.5
Max
5.3
4.5
6.0
5.4
5.4
5.3
tPLH tPHL Propagation delay
2.7
3.0 to 3.6
2.7
50
50
50
500
500
500
2.5
2.5
2.5
time
tPZL tPZH Output enable
time
ns
3.0 to 3.6
2.7
t
PLZ tPHZ Output disable
time
ns
3.0 to 3.6
tOSLH
tOSHL
Output to output
skew time (1) (2)
3.0 to 3.6
50
500
2.5
1.0
ns
1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two
outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|,
t
OSHL = | tPHLm - tPHLn|)
2. Parameter guaranteed by design
Table 8. Capacitive characteristics
Test condition
Value
TA = 25 °C
Symbol
Parameter
Unit
VCC
(V)
Min
Typ
7
Max
CIN
VIN = 0 to VCC
VIN = 0 to VCC
Input capacitance
Output capacitance
3.3
3.3
pF
pF
COUT
15
fIN = 10MHz
VIN = 0 or VCC
Power dissipation
capacitance (1)
CPD
3.3
60
pF
1. CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the
operating current consumption without load. (Refer to Test Circuit). Average operating current can be
obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/16 (per circuit)
8/15
74LCX16240
Test circuit
6
Test circuit
Figure 4. Test circuit
Figure 5. Test circuit
Test
tPLH, tPHL
PZL, tPLZ
PZH, tPHZ
Switch
Open
t
6V
t
GND
C = 50pF or equivalent (includes jig and probe capacitance)
L
R = R = 500Ω or equivalent
L
1
R = Z
of pulse generator (typically 50Ω)
T
OUT
9/15
Waveforms
74LCX16240
7
Waveforms
Figure 6. Propagation delays (f = 1MHz; 50% duty cycle)
Figure 7. Output enable and disable time (f = 1MHz; 50% duty cycle)
10/15
74LCX16240
Package mechanical data
8
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
11/15
Package mechanical data
74LCX16240
TSSOP48 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
1.2
MIN.
MAX.
0.047
0.006
A
A1
A2
b
0.05
0.15
0.002
0.9
0.035
0.17
0.09
12.4
0.27
0.20
12.6
0.0067
0.0035
0.488
0.011
0.0079
0.496
c
D
E
8.1 BSC
0.5 BSC
0.318 BSC
E1
e
6.0
6.2
0.236
0.244
0.0197 BSC
K
0°
8°
0°
8°
L
0.45
0.75
0.018
0.030
A2
A
K
L
b
e
A1
E
c
D
E1
PIN 1 IDENTIFICATION
1
7065588D
12/15
74LCX16240
Package mechanical data
Tape & Reel TSSOP48 MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
330
MIN.
MAX.
12.992
0.519
A
C
12.8
20.2
60
13.2
0.504
0.795
2.362
D
N
T
30.4
8.9
1.197
0.350
0.524
0.067
0.161
0.476
Ao
Bo
Ko
Po
P
8.7
13.1
1.5
0.343
0.516
0.059
0.153
0.468
13.3
1.7
3.9
4.1
11.9
12.1
13/15
Revision history
74LCX16240
9
Revision history
Table 9. Revision history
Date
Revision
Changes
Ordering Codes Revision - pag. 1.
Document reformatted, temperature ranges updated
15-Sep-2004
02-Feb-2007
4
5
14/15
74LCX16240
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2007 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
15/15
相关型号：
74LCX16240MEA
Low Voltage 16-Bit Inverting Buffer/Line Driver with 5V Tolerant Inputs/Outputs
FAIRCHILD
74LCX16240MTD
Low Voltage 16-Bit Inverting Buffer/Line Driver with 5V Tolerant Inputs/Outputs
FAIRCHILD
74LCX16240TTR
Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs
STMICROELECTR
74LCX16244
Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs
STMICROELECTR
©2020 ICPDF网 联系我们和版权申明