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74LVC646A Octal bus transceiver/register (3-State)
Product specification Supercedes data of 1998 Jul 29 IC24 Data Handbook 2000 Jun 21
Philips Semiconductors
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
FEATURES
* Wide supply voltage range of 1.2 V to 3.6 V * Flow-through pin-out architecture * In accordance with JEDEC standard no. 8-1A * CMOS low power consumption * Direct interface with TTL levels * 5 Volt tolerant inputs/outputs, for interfacing with 5 Volt logic
DESCRIPTION
The 74LVC646A is a high performance, low-power, low-voltage Si-gate CMOS device, superior to most advanced CMOS compatible TTL families. Inputs can be driven from either 3.3 V or 5.0 V devices. In 3-State operation, outputs can handle 5 V. This feature allows the use of these devices as translators in a mixed 3.3V/5V environment. The 74LVC646A consist of non-inverting bus transceiver circuits with 3-State outputs, D-type flip-flops and control circuitry arranged
for multiplexed transmission of data directly from the internal registers. Data on the `A' or `B' bus will be clocked in the internal registers, as the appropriate clock (CPAB or CPBA) goes to a HIGH logic level. Output enable (OE) and direction (DIR) inputs are provided to control the transceiver function. In the transceiver mode, data present at the high-impedance port may be stored in either the `A' or `B' register, or in both. The select source inputs (SAB and SBA) can multiplex stored and real-time (transparent mode) data. The direction (DIR) input determines which bus will receive data when OE is active (LOW). In the isolation mode (OE = HIGH), `A' data may be stored in the `B' register and/or `B' data may be stored in the `A' register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses, `A' or `B' may be driven at a time. The `646A' is functionally identical to the `648A' but has non-inverting data paths.
QUICK REFERENCE DATA
GND = 0V; Tamb = 25C; tr = tf 2.5 ns PARAMETER SYMBOL tPHL/tPLH fmax CI CI/O CPD Propagation delay An to Yn Maximum clock frequency Input capacitance Input/output capacitance Power dissipation capacitance per gate Notes 1, 2 CONDITIONS CL = 50 pF VCC = 3.3 V TYPICAL 3.9 250 5.0 10 26 UNIT ns MHz pF pF pF
NOTES: 1. CPD is used to determine the dynamic power dissipation (PD in W) VCC2 x fi ) (CL VCC2 fo) where: PD = CPD fi = input frequency in MHz; CL = output load capacitance in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL VCC2 fo) = sum of the outputs. 2. The condition is VI = GND to VCC.
ORDERING AND PACKAGE INFORMATION
PACKAGES 24-Pin Plastic SO 24-Pin Plastic SSOP Type II 24-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +85C -40C to +85C -40C to +85C OUTSIDE NORTH AMERICA 74LVC646A D 74LVC646A DB 74LVC646A PW NORTH AMERICA 74LVC646A D 74LVC646A DB 7LVC646APW DH PKG. DWG. # SOT137-1 SOT340-1 SOT355-1
2000 Jun 21
2
853-2105 23943
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER 1 SYMBOL CPAB SAB DIR A0 to A7 GND B0 to B7 OE SBA CPBA VCC FUNCTION `A' to `B' clock input (LOW-to-HIGH, edge-triggered) Select `A' to `B' source input Direction control input `A' data inputs/outputs Ground (0V) `B' data inputs/outputs Output enable input (active LOW) Select `B' to `A' source input `B' to `A' clock input (LOW-to-HIGH, edge-triggered) Positive supply voltage
CP AB S AB DIR A0 A1 A2 A3 A4 A5
1 2 3 4 5 6 7 8 9
24 23 22 21 20 19 18 17 16 15 14 13
V CC CP BA S BA OE B0 B1 B2 B3 B4 B5 B6 B7
2 3 4, 5, 6, 7, 8, 9, 10, 11 12 20, 19, 18, 17, 16, 15, 14, 13 21 22 23 24
A 6 10 A7 GND 11 12
SV00766
FUNCTION TABLE
INPUTS OE X X H H L L L L * DIR X X X X L L H H CPAB X H or L X X X H or L CPBA X H or L X H or L X X SAB X X X X X X L H SBA X X X X L H X X DATA I/O * A0 to A7 input un * input output input B0 to B7 un * input input input output store A, B unspecified * store B, A unspecified * store A and B data, isolation hold storage real-time B data to A bus stored B data to A bus real-time A data to B bus stored A data to B bus FUNCTION
The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled, i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock inputs. un = unspecified H = HIGH voltage level L = LOW voltage level X = Don't care = LOW-to-HIGH level transition
2000 Jun 21
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Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
LOGIC SYMBOL
FUNCTIONAL DIAGRAM
21 OE 1 2 4 5 6 7 8 9 10 11 CP AB S AB A0 A1 A2 A3 A4 A5 A6 A7 DIR 3 CP BA S BA B0 B1 B2 B3 B4 B5 B6 B7 23 22
4 5 6 7
20
A0 A1 A2 A3 A4 A5 A6 A7
B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13
8
19
9
18 17 16 15 14 13
10 11
21 3 2 22 1 23
OE DIR S AB S BA CPAB CP BA
SV00765
LOGIC SYMBOL (IEEE/IEC)
23 1 21 22 2 3 C4 C5 G3 G6 G7 3EN2 3EN1 4
SV00763
5D
1 1 1
6 6 7 7
4D 1 12
20 19 18 17 16 15 14 13
5 6 7 8 9 10 11
SV00764
2000 Jun 21
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Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
LOGIC DIAGRAM
OE
DIR S BA CP BA S AB CP AB
V CC S D1
Y An
MUX D2 Q D
FF n CP
V CC S D1 Y MUX D Q D2 Bn
FF n CP 8 identical channels
SV00762
2000 Jun 21
5
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
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 output 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 2.7 V VCC = 2.7 to 3.6 V 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 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 diode 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 t0 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 +6.5 "50 -0.5 to VCC +0.5 -0.5 to 6.5 "50 "100 -65 to +150 500 500 mW UNIT V mA V mA V mA mA C
PTOT
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.
2000 Jun 21
6
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions voltages are referenced to GND (ground = 0 V) LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40C to +85C MIN VIH HIGH level Input voltage VCC = 1.2 V VCC = 2.7 to 3.6 V LOW level Input voltage VCC = 1.2 V VCC = 2.7 to 3.6 V VCC = 2.7 V; VI = VIH or VIL; IO = -12 mA VO OH HIGH level output voltage VCC = 3.0 V; VI = VIH or VIL; IO = -100 A VCC = 3.0 V; VI = VIH or VIL; IO = -18 mA VCC = 3.0 V; VI = VIH or VIL; IO = -24 mA VCC = 2.7 V; VI = VIH or VIL; IO = 12 mA VOL LOW level output voltage VCC = 3.0 V; VI = VIH or VIL; IO = 100 A VCC = 3.0 V; VI = VIH or VIL; IO = 24 mA II IIHZ/IILZ IOZ IOFF ICC ICC Input leakage current Input current for common I/O pins 3-State output OFF-state current Power off leakage current Quiescent supply current Additional quiescent supply current per input pin VCC = 3.6 V; VI = 5.5 V or GND VCC = 3.6 V; VI = VCC or GND VCC = 3.6 V; VI = VIH or VIL; VO = 5.5 V or GND VCC = 0.0 V; VI or VO = 5.5 V VCC = 3.6 V; VI = VCC or GND; IO = 0 VCC = 2.7 V to 3.6 V; VI = VCC -0.6 V; IO = 0 Not for I/O pins "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 "15 "10 "10 10 500 A 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 = 3.3 V and Tamb = 25C.
2000 Jun 21
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Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
AC CHARACTERISTICS
GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF LIMITS SYMBOL PARAMETER WAVEFORM VCC = 3.3 V 0.3 V MIN tPHL/tPLH tPHL/tPLH tPHL/tPLH tPZH/tPZL tPHZ/tPLZ tPZH/tPZL tPHZ/tPLZ tW tsu th fmax Propagation delay An, Bn to Bn, An Propagation delay CPAB, CPBA to Bn, An Propagation delay SAB, SBA to Bn, An 3-State output enable time OEn to An, Bn 3-State output disable time OEn to An, Bn 3-State output enable time DIR to An, Bn 3-State output disable time DIR to An, Bn Clock pulse width HIGH or LOW CPAB or CPBA Set-up time An, Bn to CPAB, CPBA Hold time An, Bn to CPAB, CPBA Maximum clock pulse frequency Figures 1, 6 Figures 2, 6 Figures 3, 6 Figures 4, 6 Figures 4, 6 Figures 5, 6 Figures 5, 6 Figure 1, 3 Figure 2 Figure 2 Figure 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3.3 1.6 1.0 150 TYP1 3.9 4.6 4.9 4.5 3.9 4.6 3.5 1.9 0.35 -0.3 250 MAX 6.8 7.6 8.5 7.8 6.1 7.9 6.0 - - - - VCC = 2.7 V MIN 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3.3 1.6 1.0 125 MAX 7.8 8.6 9.5 8.8 7.1 8.9 7.0 - - - - VCC = 1.2 V TYP 15 19 19 20 10 20 12 - - - - ns ns ns ns ns ns ns ns ns ns ns UNIT
NOTE: 1. These typical values are at VCC = 3.3 V and Tamb = 25C.
2000 Jun 21
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Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
AC WAVEFORMS
VM = 1.5 V at VCC w 2.7 V VM = 0.5 V * VCC at VCC t 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load. VX = VOL + 0.3 V at VCC w 2.7 V VX = VOL + 0.1 VCC at VCC < 2.7 V VY = VOH - 0.3 V at VCC w 2.7 V VY = VOH - 0.1 VCC at VCC < 2.7 V
S AB , S
VI BA INPUT GND t PHL V OH t PLH VM
VI An, B n INPUT GND t PLH V OH Bn, A n OUTPUT V OL VM t PHL VM
Bn, A n OUTPUT V OL
VM
SV00759
Figure 3. Input SAB, SBA to output Bn, An propagation delay times.
SV00761
Figure 1. Input An, Bn to output Bn, An propagation delays.
VI OE INPUT GND tPLZ V CC OUTPUT LOW-to-OFF OFF-to-LOW VOL VM VX tPHZ tPZH VY VM outputs enabled outputs disabled outputs enabled tPZL VM
VI An, B n INPUT GND tsu VOH CPAB , CP BA OUTPUT VOL VOH B n, A n OUTPUT VOL tPHL tPLH th tsu th VM
VM tW 1/f max
VOH OUTPUT HIGH-to-OFF OFF-to-HIGH GND
SV00758
Figure 4. Input OE to output An, Bn 3-State enable and disable times.
SV00760
Figure 2. An, Bn to CPAB, CPBA set-up and hold times, clock CPAB, CPBA pulse width, maximum clock pulse frequency and the CPAB, CPBA to output Bn, An propagation delays.
2000 Jun 21
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Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
AC WAVEFORMS (Continued)
VM = 1.5 V at VCC w 2.7 V VM = 0.5 V * VCC at VCC t 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load. VX = VOL + 0.3 V at VCC w 2.7 V VX = VOL + 0.1 VCC at VCC < 2.7 V VY = VOH - 0.3 V at VCC w 2.7 V VY = VOH - 0.1 VCC at VCC < 2.7 V
TEST CIRCUIT
VCC S1 2 x VCC Open GND
PULSE GENERATOR
VI D.U.T. RT
VO
500
CL
50pF
500
VI DIR INPUT GND tPHZ VOH An OUTPUT GND VCC An OUTPUT VOL VOH Bn OUTPUT VOL VOH Bn OUTPUT VOL tPZL VM VX VX tPZH tPHZ VY VM tPHZ tPLZ tPZL VM VY VM tPZH VM VCC t 2.7V 2.7V - 3.6V VI VCC 2.7V
Test tPLH/tPHL tPLZ/tPZL tPHZ/tPZH
S1 Open 2 x VCC GND
SY00003
Figure 6. Load circuitry for switching times.
SV00757
Figure 5. Input DIR to output An, Bn 3-State enable and disable times.
2000 Jun 21
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Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
APPLICATION INFORMATION
Real-time transfer; bus B to bus A Real-time transfer; bus A to bus B
BUS B
BUS A
SV00777
SV00778
(1) OE L
(14) DIR L
(28) CPAB X
(16) CPBA X
(27) SAB X
(15) SBA L
(1) OE L
(14) DIR H
(28) CPAB X
(16) CPBA X
(27) SAB L
Storage from A, B or A and B
Transfer storage data to A or B
BUS B
BUS A
SV00779
SV00780
(1) OE X X H
(14) DIR X X X
(28) CPAB X
(16) CPBA X
(27) SAB X X X
(15) SBA X L X
(1) OE L L
(14) DIR L H
(28) CPAB X H or L
(16) CPBA H or L X
(27) SAB X H
BUS B
BUS A
2000 Jun 21
11
BUS B
BUS A
(15) SBA X
(15) SBA H X
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
SO24: plastic small outline package; 24 leads; body width 7.5 mm
SOT137-1
2000 Jun 21
12
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
SSOP24: plastic shrink small outline package; 24 leads; body width 5.3 mm
SOT340-1
2000 Jun 21
13
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
2000 Jun 21
14
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
NOTES
2000 Jun 21
15
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74LVC646A
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 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.
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 2000 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 06-00 9397-750 07235
Philips Semiconductors
2000 Jun 21 16

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