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INTEGRATED CIRCUITS
74ABT646A Octal bus transceiver/register (3-State)
Product specification Supersedes data of 1995 Sep 06 IC23 Data Handbook 1998 Feb 17
Philips Semiconductors
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
FEATURES
* Combines 74ABT245 and 74ABT374 type functions in one device * Independent registers for A and B buses * Live insertion/extraction permitted * Power-up 3-State * Power-up reset * Multiplexed real-time and stored data * Output capability: +64mA/-32mA * Latch-up protection exceeds 500mA per Jedec Std 17 * ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
The 74ABT646A transceiver/register consists of bus transceiver circuits with 3-State outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes High. Output Enable (OE) and DIR pins 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 both. The Select (SAB, SBA) pins determine whether data is stored or transferred through the device in real-time. The DIR determines which bus will receive data when the OE is active (Low). In the isolation mode (OE = High), data from Bus A may be stored in the B register and/or data from Bus B 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 examples on the next page demonstrate the four fundamental bus management functions that can be performed with the 74ABT646A.
DESCRIPTION
The 74ABT646A high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.
QUICK REFERENCE DATA
SYMBOL tPLH tPHL CIN CI/O ICCZ PARAMETER Propagation delay An to Bn or Bn to An Input capacitance CP, S, OE, DIR I/O capacitance Total supply current CONDITIONS Tamb = 25C; GND = 0V CL = 50pF; VCC = 5V VI = 0V or VCC Outputs disabled; VO = 0V or VCC Outputs disabled; VCC =5.5V TYPICAL 3.2 3.7 4 7 110 UNIT ns pF pF A
ORDERING INFORMATION
PACKAGES 24-Pin Plastic DIP 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 -40C to +85C OUTSIDE NORTH AMERICA 74ABT646A N 74ABT646A D 74ABT646A DB 74ABT646A PW NORTH AMERICA 74ABT646A N 74ABT646A D 74ABT646A DB 7ABT646APW DH DWG NUMBER SOT222-1 SOT137-1 SOT340-1 SOT355-1
PIN CONFIGURATION
CPAB SAB DIR A0 A1 A2 A3 A4 A5 A6 A7 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC CPBA SBA OE B0 B1 B2 B3 B4 B5 B6 B7
PIN DESCRIPTION
PIN NUMBER 1, 23 2, 22 3 4, 5, 6, 7, 8, 9, 10, 11 20, 19, 18, 17, 16, 15, 14, 13 21 12 24 SYMBOL CPAB / CPBA SAB / SBA DIR A0 - A7 B0 - B7 OE GND VCC FUNCTION A to B clock input / B to A clock input A to B select input / B to A select input Direction control input Data inputs/outputs (A side) Data inputs/outputs (B side) Output enable input (active-Low) Ground (0V) Positive supply voltage
SA00082
1998 Feb 17
2
853-1553 18978
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
21 3 A0 A1 A2 A3 A4 A5 A6 A7 22 2 23 1 G3 3EN1 [BA] 3EN2 [AB] G6 G7 C4 C5
4
5
6
7
8
9
10
11
1 2 3 23 22 21
CPAB SAB DIR CPBA SBA OE
4
w1 1 5D 7 7
6 61
4D
20
B0
B1
B2
B3
B4
B5
B6
B7 1
w1 2
20
19
18
17
16
15
14
13
5 6
19 18 17 16 15 14 13
SA00083
7 8 9 10 11
SA00084
REAL TIME BUS TRANSFER BUS B TO BUS A
REAL TIME BUS TRANSFER BUS A TO BUS B
STORAGE FROM A, B, OR A AND B
TRANSFER STORED DATA TO A OR B
A
B
A
B
A
B
A
B
OE L
DIR CPAB CPBA SAB SBA L X X X L
}
OE L H
DIR CPAB CPBA SAB SBA X X L X
}
OE L L H H L X
DIR CPAB CPBA SAB SBA X X X X X X X X
}
OE L L L H
DIR CPAB CPBA SAB SBA X H or L H or L X X H H X
}
SA00085
1998 Feb 17
3
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
FUNCTION TABLE
INPUTS OE X X H H L L L L H L X * = = = = DIR X X X X L L CPAB X H or L X X CPBA X H or L X H or L SAB X X X X X X SBA X X X X L H An Input Unspecified output* Input Output DATA I/O Bn Unspecified output* Input Input Input OPERATING MODE
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
H X X L X Real time A data to B bus Input Output H H or L X H X Stored A data to B bus High voltage level Low voltage level Don't care Low-to-High clock transition The data output function may be enabled or disabled by various signals at the OE input. Data input functions are always enabled, i.e., data at the bus pins will be stored on every Low-to-High transition of the clock.
LOGIC DIAGRAM
21 OE
3 DIR 23 CPBA 22 SBA 1 CPAB 2 SAB
1of 8 Channels
1D C1 Q
A0
4 1D C1 Q
20
B0
A1 A2 A3 A4 A5 A6 A7
5 6 7 8 9 10 11 DETAIL A X 7
19 18 17 16 15 14 13
B1 B2 B3 B4 B5 B6 B7
SA00086
1998 Feb 17
4
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL VCC IIK VI IOK VOUT IOUT Tstg PARAMETER DC supply voltage DC input diode current DC input voltage3 VO < 0 output in Off or High state output in Low state VI < 0 CONDITIONS RATING -0.5 to +7.0 -18 -1.2 to +7.0 -50 -0.5 to +5.5 128 -65 to 150 UNIT V mA V mA V mA C
DC output diode current DC output voltage3
DC output current Storage temperature range
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 performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150C. 3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VI VIH VIL IOH IOL t/v Tamb DC supply voltage Input voltage High-level input voltage Low-level Input voltage High-level output current Low-level output current Input transition rise or fall rate Operating free-air temperature range 0 -40 PARAMETER Min 4.5 0 2.0 0.8 -32 64 10 +85 Max 5.5 VCC V V V V mA mA ns/V C UNIT
1998 Feb 17
5
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
DC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITIONS Tamb = +25C Min VIK Input clamp voltage VCC = 4.5V; IIK = -18mA VCC = 4.5V; IOH = -3mA; VI = VIL or VIH VOH High-level output voltage VCC = 5.0V; IOH = -3mA; VI = VIL or VIH VCC = 4.5V; IOH = -32mA; VI = VIL or VIH VOL VRST II IOFF IPU/IPD IIH + IOZH IIL + IOZL ICEX IO ICCH ICCL ICCZ ICC Additional supply current per input pin2 Quiescent su ly current supply Low-level output voltage Power-up output low voltage3 Input leakage current Control pins Data pins VCC = 4.5V; IOL = 64mA; VI = VIL or VIH VCC = 5.5V; IO = 1mA; VI = GND or VCC VCC = 5.5V; VI = GND or 5.5V VCC = 5.5V; VI = GND or 5.5V VCC = 0.0V; VO or VI 4.5V VCC = 2.1V; VO = 0.5V; VI = GND or VCC; V OE = Don't care VCC = 5.5V; VO = 2.7V; VI = VIL or VIH VCC = 5.5V; VO = 0.5V; VI = VIL or VIH VCC = 5.5V; VO = 5.5V; VI = GND or VCC VCC = 5.5V; VO = 2.5V VCC = 5.5V; Outputs High, VI = GND or VCC VCC = 5.5V; Outputs Low, VI = GND or VCC VCC = 5.5V; Outputs 3-State; VI = GND or VCC VCC = 5.5V; one input at 3.4V, other inputs at VCC or GND; VCC = 5.5V -40 2.5 3.0 2.0 Typ -0.9 3.0 3.5 2.4 0.3 0.13 0.01 5 5.0 5.0 5.0 -5.0 5.0 -65 110 20 110 0.6 0.55 0.55 1.0 100 100 50 50 -50 50 -180 250 30 250 1.5 -40 Max -1.2 2.5 3.0 2.0 0.55 0.55 1.0 100 100 50 50 -50 50 -180 250 30 250 1.5 Tamb = -40C to +85C Min Max -1.2 V V V V V V A A A A A A A mA A mA A mA UNIT
Power-off leakage current Power-up/down 3-State output current4 3-State output High current 3-State output Low current Output High leakage current Output current1, 5
NOTES: 1. Not more than one output should be tested at a time, and the duration of the test should not exceed one second. 2. This is the increase in supply current for each input at 3.4V. 3. For valid test results, data must not be loaded into the flip-flops (or latches) after applying the power. 4. This parameter is valid for any VCC between 0V and 2.1V, with a transition time of up to 10msec. From VCC = 2.1V to VCC = 5V 10%, a transition time of up to 100sec is permitted. 5. This data sheet limit may vary among suppliers.
1998 Feb 17
6
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
AC CHARACTERISTICS
GND = 0V, tR = tF = 2.5ns, CL = 50pF, RL = 500 LIMITS SYMBOL PARAMETER WAVEFORM Min fMAX tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ1 tPLZ tPZH tPZL Maximum clock frequency Propagation delay CPAB to Bn or CPBA to An Propagation delay An to Bn or Bn to An Propagation delay SAB to Bn or SBA to An Output enable time OE to An or Bn Output disable time OE to An or Bn Output enable time DIR to An or Bn 1 1 2 2 3 5 6 5 6 5 6 5 6 125 2.2 1.7 1.5 1.5 1.5 1.5 1.5 3.0 1.5 1.5 1.5 2.5 1.5 1.5 Tamb = +25oC VCC = +5.0V Typ 350 3.9 4.4 3.2 3.7 3.8 4.4 3.5 4.5 4.0 3.3 3.9 4.7 4.0 3.5 5.1 5.21 4.3 4.6 5.1 5.31 5.3 7.4 4.81 4.0 5.7 9.0 5.0 4.7 Max Tamb = -40 to +85oC VCC = +5.0V 0.5V Min 125 2.2 1.7 1.5 1.5 1.5 1.5 1.5 3.0 1.5 1.5 1.2 2.5 1.5 1.5 5.6 5.6 4.8 5.4 6.5 5.9 6.3 8.8 5.31 4.5 6.7 9.5 5.7 6.0 Max MHz ns ns ns ns ns ns ns UNIT
tPHZ Output disable time tPLZ DIR to An or Bn 1. This data sheet limit may vary among suppliers.
AC SETUP REQUIREMENTS
GND = 0V, tR = tF = 2.5ns, CL = 50pF, RL = 500 LIMITS SYMBOL PARAMETER WAVEFORM Tamb = +25oC VCC = +5.0V Min ts(H) ts(L) th(H) th(L) tw(H) tw(L) Setup time An to CPAB, Bn to CPBA Hold time An to CPAB, Bn to CPBA Pulse width, High or Low CPAB or CPBA 4 4 1 3.0 3.0 0.0 0.0 4.0 4.0 Typ 0.7 0.7 -0.5 -0.5 0.9 1.4 Tamb = -40 to +85oC VCC = +5.0V 0.5V Min 3.0 3.0 0.0 0.0 4.0 4.0 ns ns ns UNIT
1998 Feb 17
7
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
1/fMAX An or Bn CPBA or CPAB VM tw(H) tPHL An or Bn VM VM tw(L) tPLH VM NOTE: The shaded areas indicate when the input is permitted to change for predictable output performance. VM
CPBA or CPAB
SA00087
Waveform 1. Propagation Delay, Clock Input to Output, Clock Pulse Width, and Maximum Clock Frequency
OE, DIR SBA or SAB An or Bn DIR tPZH tPLH An or Bn VM tPHL VM An or Bn An or Bn VM VOH -0.3V 0V tPHZ VM VM
VM
VM
SA00088
Waveform 2. Propagation Delay, SAB to Bn or SBA to An, An to Bn or Bn to An
Waveform 5. 3-State Output Enable Time to High Level and Output Disable Time from High Level
OE, DIR VM VM tPHL An or Bn VM VM tPLH VM An or Bn VM VOL +0.3V 0V DIR tPZL tPLZ VM
SBA or SAB
SA00089
Waveform 3. Propagation Delay, SBA to An or SAB to Bn
Waveform 6. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level
1998 Feb 17
8
EEE E EEEEEEEEE EEE E EEEEEEEEE EEE EEEEEEE EEE
VM VM VM VM ts(H) th(H) ts(L) th(L) tW(L) VM VM
SA00090
Waveform 4. Data Setup and Hold Times
SA00091
SA00092
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
TEST CIRCUIT AND WAVEFORM
7V From Output Under Test CL = 50 pF 500 S1 Open GND 500
Load Circuit
TEST tpd tPLZ/tPZL tPHZ/tPZH
S1 open 7V open
DEFINITIONS Load capacitance includes jig and probe capacitance; CL = see AC CHARACTERISTICS for value.
SA00012
1998 Feb 17
9
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
DIP24: plastic dual in-line package; 24 leads (300 mil)
SOT222-1
1998 Feb 17
10
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
SO24: plastic small outline package; 24 leads; body width 7.5 mm
SOT137-1
1998 Feb 17
11
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
SSOP24: plastic shrink small outline package; 24 leads; body width 5.3 mm
SOT340-1
1998 Feb 17
12
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
1998 Feb 17
13
Philips Semiconductors
Product specification
Octal bus transceiver/register (3-State)
74ABT646A
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: 05-96 9397-750-03803
Philips Semiconductors
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