View 74LCX541_4317809.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

74LCX541
Low voltage CMOS octal bus buffer (3-state) with 5V tolerant inputs and outputs
Features

5V tolerant inputs and outputs High speed: - tPD = 8.0ns (Max) at VCC = 3V Power down protection on inputs and outputs Symmetrical output impedance: - |IOH| = IOL = 24mA (Min) at VCC = 3V PCI bus levels guaranteed at 24mA Balanced propagation delays: - tPLH tPHL Operating voltage range: - VCC (Opr) = 2.0V to 3.6V Pin and function compatible with 74 series 541 Latch-up performance exceeds 500mA (JESD 17) ESD performance: - HBM > 2000V (MIL STD 883 method 3015); MM > 200V
SO-20 TSSOP20
Description
The 74LCX541 is a low voltage CMOS octal bus buffer (non-inverted) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS 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. The 3 STATE control gate operates as two input AND such that if either G1 and G2 are high, all eight outputs are in the high impedance state. In order to enhance PC board layout the 74LCX541 offers a pinout having inputs and outputs on opposite sides of the package. 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 74LCX541MTR 74LCX541TTR Package SO-20 TSSOP20 Packaging Tape and reel Tape and reel
January 2007
Rev 5
1/17
www.st.com 17
Contents
74LCX541
Contents
1 2 Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 2.2 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Logic states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17
74LCX541
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
3/17
Pin settings
74LCX541
2
2.1
Pin settings
Pin connection
Figure 3. Pin connection (top through view)
2.2
Pin description
Table 1. Pin description
Pin N 1, 19 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 12, 11 10 20 Symbol G1, G2 A1 to A8 Y1 to Y8 GND VCC Name and function Output enable inputs Data inputs Data outputs Ground (0V) Positive supply voltage
4/17
74LCX541
Logic states
3
3.1
Logic states
Truth table
Table 2. Truth table
Input G1 H X L L G2 X H L L An X X H L Output Yn Z Z L H
Note:
X : Do not care Z : High impedance
5/17
Maximum rating
74LCX541
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 VCC VI VO VO IIK IOK IO ICC IGND Tstg TL Supply voltage DC input voltage DC output voltage (OFF state) DC output voltage (high or low state) (1) DC input diode current DC output diode current (2) DC output current DC supply current per supply pin DC ground current per supply pin Storage temperature Lead temperature (10 sec) Parameter Value -0.5 to +7.0 -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC + 0.5 -50 -50 50 100 100 -65 to +150 300 Unit V V V V mA mA mA mA mA C C
1. IO absolute maximum rating must be observed 2. VO < GND
4.1
Recommended operating conditions
Table 4. Recommended operating conditions
Symsbol VCC VI VO VO IOH, IOL IOH, IOL Top dt/dv Supply voltage (1) Input voltage Output voltage (OFF state) Output voltage (high or low state) High or low level output current (VCC = 3.0 to 3.6V) High or low level output current (VCC = 2.7V) Operating temperature Input rise and fall time (2) Parameter Value 2.0 to 3.6 0 to 5.5 0 to 5.5 0 to VCC 24 12 -40 to 85 0 to 10 Unit V V V V mA mA C ns/V
1. Truth table guaranteed: 1.5V to 3.6V 2. VIN from 0.8V to 2V at VCC = 3.0V
6/17
74LCX541
Electrical characteristics
5
Electrical characteristics
Table 5. DC specifications
Test condition Symbol Parameter VCC (V) 2.7 to 3.6 Low level input voltage 2.7 to 3.6 2.7 VOH High level output voltage 3.0 2.7 to 3.6 2.7 VOL Low level output voltage 3.0 II Ioff IOZ Input leakage current Power OFF leakage current High impedance output leakage current Quiescent supply current I incr. per Input 2.7 to 3.6 0 2.7 to 3.6 IO = -100A IO = -12mA IO = -18mA IO = -24mA IO = 100A IO = 12mA IO = 16mA IO = 24mA VI = 0 to 5.5V VI or VO = 5.5V VI = VIH or VIL VO = 0 to VCC VI = VCC or GND VI or VO = 3.6 to 5.5V 2.7 to 3.6 VIH = VCC - 0.6V VCC-0.2 2.2 V 2.4 2.2 0.2 0.4 V 0.4 0.55 5 10 5 10 10 500 A A A 0.8 V Value -40 to 85C Min 2.0 Max V Unit
VIH VIL
High level input voltage
ICC ICC
2.7 to 3.6
A A
Table 6. Dynamic switching characteristics
Test condition Symbol Parameter VCC (V) 3.3 CL = 50pF VIL = 0V, VIH = 3.3V Value TA = 25 C Min Typ 0.8 V -0.8 Max Unit
VOLP VOLV
Dynamic low level quiet output (1)
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.
7/17
Electrical characteristics
74LCX541
Table 7. AC electrical characteristics
Test condition Symbol Parameter VCC (V) 2.7 3.0 to 3.6 2.7 3.0 to 3.6 2.7 3.0 to 3.6 3.0 to 3.6 50 500 2.5 50 500 2.5 50 500 2.5 CL (pF) 50 RL () 500 ts = tr (ns) 2.5 Value -40 to 85 C Min 1.5 1.5 1.5 1.5 1.5 1.5 Max 9.0 8.0 9.5 8.5 8.5 7.5 1.0 ns ns ns ns Unit
tPLH tPHL Propagation delay time tPZL tPZH Output enable time tPLZ tPHZ Output disable time tOSLH tOSHL output to output skew time (1) (2)
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|, tOSHL = | tPHLm - tPHLn|) 2. Parameter guaranteed by design
Table 8. Capacitive characteristics
Test condition Symbol CIN COUT CPD Parameter VCC (V) 3.3 3.3 3.3 VIN = 0 to VCC VIN = 0 to VCC fIN = 10MHz VIN = 0 or VCC Value TA = 25 C Min Typ 6 12 25 Max pF pF pF Unit
Input capacitance Output capacitance Power dissipation capacitance (1)
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/8 (per buffer)
8/17
74LCX541
Test circuit
6
Test circuit
Figure 4. Test circuit
Figure 5.
Test circuit
Test tPLH, tPHL tPZL, tPLZ tPZH, tPHZ Switch Open 6V GND
CL = 50pF or equivalent (includes jig and probe capacitance) RL = R1 = 500 or equivalent RT = ZOUT of pulse generator (typically 50)
9/17
Waveforms
74LCX541
7
Waveforms
Figure 6. Propagation delays (f = 1MHz; 50% duty cycle)
Figure 7.
Output enable and disable time (f = 1MHz; 50% duty cycle)
10/17
74LCX541
Package mechanical data
8
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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
11/17
Package mechanical data
74LCX541
SO-20 MECHANICAL DATA
DIM. A A1 B C D E e H h L k ddd 10.00 0.25 0.4 0 mm. MIN. 2.35 0.1 0.33 0.23 12.60 7.4 1.27 10.65 0.75 1.27 8 0.100 0.394 0.010 0.016 0 TYP MAX. 2.65 0.30 0.51 0.32 13.00 7.6 MIN. 0.093 0.004 0.013 0.009 0.496 0.291 0.050 0.419 0.030 0.050 8 0.004 inch TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299
0016022D
12/17
74LCX541
Package mechanical data
TSSOP20 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 6.4 6.2 4.3 6.5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 6.6 6.6 4.48 0.002 0.031 0.007 0.004 0.252 0.244 0.169 0.256 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0079 0.260 0.260 0.176 inch
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0087225C
13/17
Package mechanical data
74LCX541
Tape & Reel SO-20 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.8 13.2 3.1 3.9 11.9 12.8 20.2 60 30.4 11 13.4 3.3 4.1 12.1 0.425 0.520 0.122 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 1.197 0.433 0.528 0.130 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
14/17
74LCX541
Package mechanical data
Tape & Reel TSSOP20 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.8 6.9 1.7 3.9 11.9 12.8 20.2 60 22.4 7 7.1 1.9 4.1 12.1 0.268 0.272 0.067 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.276 0.280 0.075 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
15/17
Revision history
74LCX541
9
Revision history
Table 9. Revision history
Date 15-Sep-2004 24-Jan-2007 Revision 4 5 Changes Ordering Codes Revision - pag. 1. The document has been reformatted, temperature ranges updated
16/17
74LCX541
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.
(c) 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
17/17

▲Up To Search▲

Price & Availability of 74LCX541

	To Download 74LCX541 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .