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74LV257 Quad 2-input multiplexer (3-State)
Product specification Supersedes data of 1997 Jun 06 IC24 Data Handbook 1998 May 20
Philips Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
FEATURES
* Optimized for low voltage applications: 1.0 to 3.6 V * Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V * Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, * Typical VOHV (output VOH undershoot) > 2 V at VCC = 3.3 V, * Non-inverting data path * Output capability: bus driver * ICC category: MSI
Tamb = 25C Tamb = 25C
DESCRIPTION
The 74LV257 is a low-voltage Si-gate CMOS device and is pin and function compatible with 74HC/HCT257. The 74LV257 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) from the selected inputs. The 74LV257 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. The logic equations for the outputs are: 1Y = OE x (1l1 x S + 1l0 x S) 2Y = OE x (2l1 x S + 2l0 x S) 3Y = OE x (3l1 x S + 3l0 x S) 4Y = OE x (4l1 x S + 4l0 x S)
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 gate VI = GND to VCC
1
CONDITIONS CL = 15 pF; VCC = 3.3 V
TYPICAL 10 14 3.5 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 DIL 16-Pin Plastic SO 16-Pin Plastic SSOP Type II 16-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C OUTSIDE NORTH AMERICA 74LV257 N 74LV257 D 74LV257 DB 74LV257 PW NORTH AMERICA 74LV257 N 74LV257 D 74LV257 DB 74LV257PW DH PKG. DWG. # SOT38-4 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
PIN DESCRIPTION
PIN NUMBER 1 2, 5, 11, 14 3, 6, 10, 13 4, 7, 9, 12 8 15
3l1 3Y
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 inputs from source 1 3-state multiplexer outputs Ground (0 V) 3-State output enable input (active LOW) Positive supply voltage
16
SV00636
1998 May 20
2
853-1985 19420
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
LOGIC SYMBOL
2 3 5 6 11 10 14 13
FUNCTIONAL DIAGRAM
2 1I0 11I 2I0 2I1 3I0 3I1 4I0 4I1 1 15 3 5 6 11 10 4 7 9 12 14
1I0 1I1 2I0 2I1 3I0 3I1 4I0 4I1 4Y 12
SELECTOR 3-STATE MULTIPLEXER OUTPUTS
1Y
4
S OE 1Y 2Y 3Y 4Y
2Y
7
3Y
9
SV00637
13
LOGIC SYMBOL (IEEE/IEC)
S 1 15 1 G1 EN OE 15
SV00639
FUNCTION TABLE
2 3 5 7 6 11 9 10 14 12 13 1 1 MUX 4
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
NOTES: H = HIGH voltage level L = LOW voltage level X = don't care Z = high impedance OFF-state
SV00638
LOGIC DIAGRAM
1I1 1I0 2I1 2I0 3I1 3I0 4I1 4I0 OE 1Y
2Y
3Y
4Y
S
SV00640
1998 May 20
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VI VO Tamb PARAMETER DC supply voltage Input voltage Output voltage Operating ambient temperature range in free air See DC and AC characteristics VCC = 1.0V to 2.0V VCC = 2.0V to 2.7V VCC = 2.7V to 3.6V CONDITIONS See Note 1 MIN 1.0 0 0 -40 -40 - - - - - - TYP 3.3 - - MAX 3.6 VCC VCC +85 +125 500 200 100 UNIT V V V C
tr, tf
Input rise and fall times
ns/V
NOTE: 1. The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC =3.6V.
ABSOLUTE MAXIMUM RATINGS1, 2
In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0 V). SYMBOL VCC "IIK "IOK "IO "IGND, "ICC Tstg PARAMETER DC supply voltage DC input diode current DC output diode current DC output source or sink current - bus driver outputs DC VCC or GND current for types with - bus driver outputs Storage temperature range Power dissipation per package - plastic DIL - plastic mini-pack (SO) - plastic shrink mini-pack (SSOP and TSSOP) for temperature range: -40 to +125C above +70C derate linearly with 12 mW/K above +70C derate linearly with 8 mW/K above +60C derate linearly with 5.5 mW/K VI < -0.5 or VI > VCC + 0.5V VO < -0.5 or VO > VCC + 0.5V -0.5V < VO < VCC + 0.5V CONDITIONS RATING -0.5 to +4.6 20 50 35 UNIT V mA mA mA
70 -65 to +150 750 500 400
mA C
PTOT
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 May 20
4
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0 V). LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN VCC = 1.2 V VIH HIGH l level I l Input t voltage VCC = 2.0 V VCC = 2.7 to 3.6 V VCC = 1.2 V VIL LOW l level I l Input t voltage VCC = 2.0 V VCC = 2.7 to 3.6 V VCC = 1.2 V; VI = VIH or VIL; -IO = 100A VO OH HIGH level output voltage; all outputs VCC = 2.0 V; VI = VIH or VIL; -IO = 100A VCC = 2.7 V; VI = VIH or VIL; -IO = 100A VCC = 3.0 V; VI = VIH or VIL; -IO = 100A VOH HIGH level output voltage; BUS driver outputs VCC = 3.0 V; VI = VIH or VIL; -IO = 8mA VCC = 1.2 V; VI = VIH or VIL; IO = 100A VO OL LOW level output voltage; all outputs VCC = 2.0 V; VI = VIH or VIL; IO = 100A VCC = 2.7 V; VI = VIH or VIL; IO = 100A VCC = 3.0 V; VI = VIH or VIL; IO = 100A VOL II IOZ ICC ICC LOW level output voltage; BUS driver outputs Input leakage current 3-State output OFF-state current Quiescent supply current; MSI Additional quiescent supply current per input VCC = 3.0 V; VI = VIH or VIL; IO = 8mA VCC = 3.6 V; VI = VCC or GND VCC = 3.6 V; VI = VIH or VIL; VO = VCC or GND VCC = 3.6 V; VI = VCC or GND; IO = 0 VCC = 2.7 V to 3.6 V; VI = VCC - 0.6 V 1.8 2.5 2.8 2.40 1.2 2.0 2.7 3.0 2.82 0 0 0 0 0.20 0.2 0.2 0.2 0.40 1.0 5 20.0 500 0.2 0.2 0.2 0.50 1.0 10 160 850 V A A A A V 1.8 2.5 2.8 2.20 V V 0.9 1.4 2.0 0.3 0.6 0.8 -40C to +85C TYP1 MAX -40C to +125C MIN 0.9 1.4 2.0 0.3 0.6 0.8 V V MAX UNIT
NOTE: 1. All typical values are measured at Tamb = 25C.
1998 May 20
5
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
AC CHARACTERISTICS
GND = 0V; tr = tf 2.5ns; CL = 50pF; RL = 1K SYMBOL PARAMETER WAVEFORM CONDITION VCC(V) 1.2 tPHL/tPLH / Propagation delay nl0 to nY nl1 to nY 2.0 Figure 1 2.7 3.0 to 3.6 1.2 tPHL/tPLH Propagation delay g y S to nY Figure 1 2.0 2.7 3.0 to 3.6 1.2 tPZH/tPZL 3-State output enable time OE to nY Figure 2 2.0 2.7 3.0 to 3.6 1.2 tPHZ/tPLZ / 3-State output disable time OE to nY Figure 2 2.0 2.7 3.0 to 3.6 NOTES: 1. Unless otherwise stated, all typical values are measured at Tamb = 25C 2. Typical values are measured at VCC = 3.3 V. MIN LIMITS -40 to +85 C TYP1 65 22 16 122 85 29 21 162 60 20 15 112 65 24 18 142 40 32 26 49 37 30 ns 39 29 23 46 34 27 ns 56 41 33 66 49 39 ns 43 31 25 51 38 30 ns MAX -40 to +125 C MIN MAX UNIT
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 S, nI0, nI1 INPUTS GND tPHL VOH nY OUTPUT VOL VM tPLH VM VOH OUTPUT HIGH-to-OFF OFF-to-HIGH GND outputs enabled VI OE INPUT GND tPLZ VCC OUTPUT LOW-to-OFF OFF-to-LOW VOL tPHZ VY VM outputs disabled VM VX tPZH tPZL VM
outputs enabled
SV00642 SV00641
Figure 2. 3-State enable and disable times.
Figure 1. Input (S, nl0, nl1) to output (nY) propagation delays.
1998 May 20
6
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
TEST CIRCUIT
VCC
VI PULSE GENERATOR RT D.U.T.
VO
50pF CL
RL= 1K
Test Circuit for switching times DEFINITIONS
RT = Termination resistance should be equal to ZOUT of pulse generators. RL = Load resistor CL = Load capacitance includes jig and probe capacitance TEST tPLH/tPHL VCC < 2.7V 2.7-3.6V VI VCC 2.7V
SV00776
Figure 3. Load circuitry for switching times.
1998 May 20
7
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
DIP14: plastic dual in-line package; 14 leads (300 mil)
SOT27-1
1998 May 20
8
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
SO14: plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
1998 May 20
9
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
SSOP14: plastic shrink small outline package; 14 leads; body width 5.3 mm
SOT337-1
1998 May 20
10
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
TSSOP14: plastic thin shrink small outline package; 14 leads; body width 4.4 mm
SOT402-1
1998 May 20
11
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
DEFINITIONS
Data Sheet Identification
Objective Specification
Product Status
Formative or in Design
Definition
This data sheet contains the design target or goal specifications for product development. Specifications 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 changes 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.
Preliminary Specification
Preproduction Product
Product Specification
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve 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. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. 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: 05-96 9397-750-04441
Philips Semiconductors
1998 May 20 12

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