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74LVC257A Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
Product specification Superceded data of 1997 Sep 26 IC24 Data Handbook 1998 Jul 29
Philips Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
FEATURES
* Wide supply voltage range of 1.2 to 3.6 V * In accordance with JEDEC standard no. 8-1A * CMOS lower power consumption * Direct interface with TTL levels * Output drive capability 50 W transmission lines at 85C * 5 Volt tolerant inputs/outputs, for interfacing with 5 Volt logic
DESCRIPTION
The 74LVC257A is a high-performance, low-power, low-voltage, Si-gate CMOS device and superior to most advanced CMOS compatible TTL families. Inputs can be driven from either 3.3V or 5.0V devices. In 3-State operation, outputs can handle 5V. This feature allows the use of these devices as translators in a mixed 3.3V/5V environment. The 74LVC257A is a quad 2-input multiplexer with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (S). The data inputs from source 0 (1l0 to 4l0) are selected when input S is LOW and the data inputs from source 1 (1l1 to 4l1) are selected when S in HIGH. Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs. The 74LVC257A is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S. The outputs are forced to a high impedance OFF-state when OE is HIGH.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25C; tr =tf 2.5 ns SYMBOL tPHL/tPLH CI CPD PARAMETER Propagation delay nl0, nl1 to nY S to nY Input capacitance Power dissipation capacitance per channel VI = GND to VCC
1
CONDITIONS CL = 50 pF; VCC = 3.3 V
TYPICAL 3.9 3.5 5.0 30
UNIT ns pF pF
NOTE: 1. CPD is used to determine the dynamic power dissipation (PD in W) PD = CPD x VCC2 x fi ) (CL x VCC2 x fo) where: fi = input frequency in MHz; CL = output load capacitance in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL x VCC2 x fo) = sum of the outputs.
ORDERING INFORMATION
PACKAGES 16-Pin Plastic SO 16-Pin Plastic SSOP Type II 16-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +85C -40C to +85C -40C to +85C OUTSIDE NORTH AMERICA 74LVC257A D 74LVC257A DB 74LVC257A PW NORTH AMERICA 74LVC257A D 74LVC257A DB 74LVC257APW DH PKG. DWG. # SOT109-1 SOT338-1 SOT403-1
PIN CONFIGURATION
S 1I0 1I1 IY 2l0 2l1 2Y GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OE 4l0 4l1 4Y 3l0 3l1 3Y
LOGIC SYMBOL
2 3 5 6 11 10 14 13
1I0 11I 2I0 2I1 3I0 3I1 4I0 4I1 1 15
S OE 1Y 2Y 3Y 4Y
4
7
9
12
SV00637 SV00636
1998 Jul 29
2
853-2101 19802
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
PIN DESCRIPTION
PIN NUMBER 1 2, 5, 11, 14 3, 6, 10, 13 4, 7, 9, 12 8 15 16 SYMBOL S 1l0 to 4l0 1l1 to 4l1 1Y to 4Y GND OE VCC FUNCTION Common data select input Data inputs from source 0 Data outputs from source 1 3-State multiplexer outputs Ground (0 V) 3-State output enable input (active LOW) Positive supply voltage
FUNCTION TABLE
INPUTS OE H L L L L S X H H L L nl0 X X X L H nl1 X L H X X OUTPUTS nY Z L H L H
LOGIC SYMBOL (IEEE/IEC)
1 15 G1 EN
NOTES: H = HIGH voltage level L = LOW voltage level X = don't care Z = high impedance OFF-state
LOGIC DIAGRAM
1I1 1Y
2 3 5
1 1
MUX 4
1I0 2I1 7 2I0 3I1
2Y
6 11 9 10 14 12 13 4I1 4I0 OE 4Y 3I0 3Y
SV00638
S
FUNCTIONAL DIAGRAM
SV00640
2 3 5 6 11 10 14 13
1I0 1I1 2I0 2I1 3I0 3I1 4I0 4I1 4Y 12
SELECTOR 3-STATE MULTIPLEXER OUTPUTS
1Y
4
2Y
7
3Y
9
S 1
OE 15
SV00639
1998 Jul 29
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VI VO Tamb tr, tf PARAMETER DC supply voltage (for max. speed performance) DC supply voltage (for low-voltage applications) DC input voltage range DC input voltage range; output HIGH or LOW state DC output voltage range; output 3-State Operating free-air temperature range Input rise and fall times VCC = 1.2 to 2.7V VCC = 2.7 to 3.6V CONDITIONS LIMITS MIN 2.7 1.2 0 0 0 -40 0 0 MAX 3.6 3.6 5.5 VCC 5.5 +85 20 10 UNIT V V V C ns/V
ABSOLUTE MAXIMUM RATINGS1
In accordance with the Absolute Maximum Rating System (IEC 134); Voltages are referenced to GND (ground = 0V) SYMBOL VCC IIK VI IOK VO IO IGND, ICC Tstg PTOT PARAMETER DC supply voltage DC input diode current DC input voltage DC output diode current DC output voltage; output HIGH or LOW DC output voltage; output 3-State DC output source or sink current DC VCC or GND current Storage temperature range Power dissipation per package - plastic mini-pack (SO) - plastic shrink mini-pack (SSOP and TSSOP) above +70C derate linearly with 8 mW/K above +60C derate linearly with 5.5 mW/K VI t 0 Note 2 VO uVCC or VO t 0 Note 2 Note 2 VO = 0 to VCC CONDITIONS RATING -0.5 to +6.5 -50 -0.5 to +5.5 "50 -0.5 to VCC +0.5 -0.5 to 6.5 "50 "100 -65 to +150 500 500 UNIT V mA V mA V mA mA C
mW
NOTES: 1. Stresses beyond those listed 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. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Jul 29
4
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions voltages are referenced to GND (ground = 0V) LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40C to +85C MIN VIH HIGH level Input voltage VCC = 1.2V VCC = 2.7 to 3.6V LOW level Input voltage VCC = 1.2V VCC = 2.7 to 3.6V VCC = 2.7V; VI = VIH or VIL; IO = -12mA VO OH HIGH level output voltage VCC = 3.0V; VI = VIH or VIL; IO = -100A VCC = 3.0V; VI = VIH or VIL; IO = -18mA VCC = 3.0V; VI = VIH or VIL; IO = -24mA VCC = 2.7V; VI = VIH or VIL; IO = 12mA VOL LOW level output voltage VCC = 3.0V; VI = VIH or VIL; IO = 100A VCC = 3.0V; VI = VIH or VIL; IO = 24mA II IOZ IOFF ICC ICC Input leakage current 3-State output OFF-state current Power off leakage current Quiescent supply current Additional quiescent supply current per input pin VCC = 3 6V; VI = 5 5V or GND 3.6V; 5.5V VCC = 3.6V; VI = VIH or VIL; VO = VCC or GND VCC = 0.0V; VI or VO = 5.5V VCC = 3.6V; VI = VCC or GND; IO = 0 VCC = 2.7V to 3.6V; VI = VCC -0.6V; IO = 0 "0.1 "0 1 0.1 0.1 0.1 5 GND VCC*0.5 VCC*0.2 VCC*0.6 VCC*0.8 0.40 0.20 0.55 "5 "5 "10 10 500 A A A A A V VCC V VCC 2.0 GND V 0.8 TYP1 MAX V UNIT
VIL
NOTES: 1. All typical values are at VCC = 3.3V and Tamb = 25C.
AC CHARACTERISTICS
GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500W; Tamb = -40_C to +85_C LIMITS SYMBOL PARAMETER Propagation delay nl0 to nY nl1 to nY Propagation delay S to nY 3-state output enable time OE to nY 3-state output disable time OE to nY WAVEFORM VCC = 3.3V 0.3V MIN tPHL/tPLH tPHL/tPLH tPZH/tPZL tPHZ/tPLZ Figures 1, 3 Figures 1, 3 Figures 2, 3 Figures 2, 3 1.5 1.5 1.5 1.5 TYP1 3.9 3.5 3.7 3.2 MAX 5.1 6.4 6.5 5.2 MIN 1.5 1.5 1.5 1.5 VCC = 2.7V TYP1 3.3 4.3 4.6 3.5 MAX 6.1 7.5 7.5 6.2 VCC = 1.2V TYP 11 14 15 12 ns ns ns ns UNIT
NOTE: 1. These typical values are at VCC = 3.3V and Tamb = 25C.
1998 Jul 29
5
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
AC WAVEFORMS
VM = 0.5 x VCC at VCC < 2.7 V VM = 1.5 V at VCC 2.7 V VX = VOL + 0.3 V at VCC 2.7 V VX = VOL + 0.1 x VCC at VCC < 2.7 V VY = VOH - 0.3 V at VCC 2.7V VY = VOH - 0.1 x VCC at VCC < 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load.
VCC
TEST CIRCUIT
VCC S1 2 x VCC Open GND
PULSE GENERATOR
VI D.U.T. RT
VO
500
CL
50pF
500
Test S, nI0, nI1 INPUTS GND tPHL VOH nY OUTPUT VOL VM tPLH VM VCC t 2.7V 2.7V - 3.6V VI VCC 2.7V tPLH/tPHL tPLZ/tPZL tPHZ/tPZH
S1 Open 2 x VCC GND
SY00003
Figure 3. Load circuitry for switching times.
SV00641
Figure 1. Input (S, nl0, nl1) to output (nY) propagation delays.
VI OE INPUT GND tPLZ VCC OUTPUT LOW-to-OFF OFF-to-LOW VOL tPHZ VOH OUTPUT HIGH-to-OFF OFF-to-HIGH GND outputs enabled VY VM outputs disabled VM VX tPZH tPZL VM
outputs enabled
SV00642
Figure 2. 3-state enable and disable times.
1998 Jul 29
6
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1998 Jul 29
7
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
1998 Jul 29
8
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
1998 Jul 29
9
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs (3-State)
74LVC257A
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 08-98 9397-750-04504
Philips Semiconductors
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