N74ALS646D [PHILIPS]
Registered Bus Transceiver, 1-Func, 8-Bit, True Output, TTL, PDSO24,;
| 型号： | N74ALS646D |
| 厂家： | 
PHILIPS SEMICONDUCTORS |
| 描述： | Registered Bus Transceiver, 1-Func, 8-Bit, True Output, TTL, PDSO24, 光电二极管 逻辑集成电路 触发器 |
| 文件： | 总13页 (文件大小：155K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74ALS646/74ALS646–1
74ALS648/74ALS648–1
Transceiver/register
Product specification
IC05 Data Handbook
1991 Feb 08
Philips
Semiconductors
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
74ALS646/646-1
74ALS648/648-1
Octal transceiver/register, non-inverting (3-State)
Octal transceiver/register, inverting (3-State)
FEATURES
TYPICAL
SUPPLY CURRENT
(TOTAL)
TYPE
TYPICAL f
MAX
• Combines 74ALS245 and two 74ALS374 type functions in
one chip
74ALS646/646-1
74ALS648/648-1
140MHz
140MHz
48mA
54mA
• Independent registers for A and B buses
• Multiplexed real-time and stored data
• Choice of non-inverting and inverting data paths
• 3-State outputs
ORDERING INFORMATION
ORDER CODE
DRAWING
NUMBER
COMMERCIAL RANGE
• The -1 version sink 48mA I within the ±5% V range
OL
CC
V
CC
= 5V ±10%,
= 0°C to +70°C
DESCRIPTION
T
amb
DESCRIPTION
74ALS646N, 74ALS646-1N,
74ALS648N, 74ALS648-1N
24-pin plastic DIP
24-pin plastic SOL
SOT222-1
SOT137-1
The 74ALS646/74ALS646-1 and 74ALS648/74ALS648-1
transceivers/registers consist 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 direction (DIR) and select (SAB, SBA) pins are provided
for bus management.
74ALS646D, 74ALS646-1D,
74ALS648D, 74ALS648-1D
The 74ALS646-1 and 74ALS648-1 will sink 48mA if the V is
CC
limited to 5.0V ±0.25V.
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
74ALS (U.L.)
LOAD VALUE
PINS
DESCRIPTION
HIGH/LOW
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
750/240
750/480
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
15mA/24mA
15mA/48mA
A0 – A7
B0 – B7
CPAB
A inputs
B inputs
A-to-B clock input
B-to-A clock input
A-to-B select input
B-to-A select input
CPBA
SAB
SBA
DIR
Data flow directional control input
Output enable input
OE
A0 – A7, B0 – B7
A0 – A7, B0 – B7
Data outputs
Data outputs (-1 version)
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
2
1991 Feb 08
853–1408 01670
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
PIN CONFIGURATION – 74ALS646/646-1
PIN CONFIGURATION – 74ALS648/648-1
1
2
24
23
22
21
20
19
18
17
16
15
14
13
V
1
2
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
CPAB
SAB
DIR
A0
CC
CPAB
SAB
DIR
A0
CPBA
SBA
OE
B0
CPBA
SBA
OE
B0
3
3
4
4
5
5
A1
A1
6
6
A2
B1
A2
B1
7
7
A3
B2
A3
B2
8
8
A4
A4
B3
B3
9
9
A5
A5
B4
B5
B4
B5
10
11
10
11
A6
A6
A7
B6
B7
A7
B6
B7
GND 12
GND 12
SC00118
SC00119
LOGIC SYMBOL – 74ALS646/646-1
LOGIC SYMBOL – 74ALS648/648-1
4
5
6
7
8
9
10 11
4
5
6
7
8
9
10 11
A0 A1 A2 A3 A4 A5 A6 A7
CPAB
A0 A1 A2 A3 A4 A5 A6 A7
CPAB
1
1
2
3
SAB
2
3
SAB
DIR
DIR
23
22
21
SPBA
23
22
21
SPBA
SBA
SBA
OE
OE
B0 B1 B2 B3 B4 B5 B6 B7
B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13
V
= Pin 24
CC
V
= Pin 24
CC
GND = Pin 12
20 19 18 17 16 15 14 13
GND = Pin 12
SC00121
SC00120
IEC/IEEE SYMBOL – 74ALS646/646-1
IEC/IEEE SYMBOL – 74ALS648/648-1
21
21
G3
G3
3
3
3 EN1 [BA]
3 EN1 [BA]
3 EN2 [AB]
3 EN2 [AB]
23
23
C4
C4
22
22
G5
G5
1
1
C6
C6
2
2
G7
G7
20
20
1
1
5
5
5
5
4D
4D
4
4
1
1
1
1
1
1
7
7
7
7
6D
6D
2
2
1
1
5
6
7
19
5
6
7
19
18
17
18
17
16
15
16
15
8
8
9
9
10
11
14
13
10
11
14
13
SC00122
SC00123
3
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
BUS MANAGEMENT FUNCTIONS
The following examples demonstrate the four fundamental
bus-management functions that can be performed with the
74ALS646/646-1 and 74ALS648/648-1.
The select 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 pin is
Low.
STORAGE FROM
A, B, OR A AND B
REAL TIME BUS TRANSFER
BUS A TO BUS B
TRANSFER STORED DATA
TO A AND/OR B
REAL TIME BUS TRANSFER
BUS B TO BUS A
BUS A
BUS A
BUS A
BUS B
BUS B
BUS A
BUS B
BUS B
OE DIR CPAB CPBA SAB SBA
OE DIR CPAB CPBA SAB SBA
OE DIR CPAB CPBA SAB SBA
OE DIR CPAB CPBA SAB SBA
L
H
X
X
L
X
X
X
H
X
X
X
↑
X
↑
X
↑
↑
X
X
X
X
X
X
L
L
L
H
X
H or L
X
X
H
H
X
L
L
X
X
X
L
H or L
SF00392
4
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
LOGIC SYMBOL – 74ALS646/646-1
LOGIC SYMBOL – 74ALS648/648-1
21
21
OE
OE
3
3
DIR
DIR
23
23
22
1
CPBA
CPBA
22
SBA
SBA
CPAB
1
CPAB
2
2
SAB
SAB
1 OF 8 CHANNELS
1 OF 8 CHANNELS
1D
C1
1D
C1
4
4
20
20
A0
A0
B0
B0
1D
C1
1D
C1
V
= Pin 24
V
= Pin 24
CC
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
CC
GND = Pin 12
GND = Pin 12
SC00124
SC00125
FUNCTION TABLE
INPUTS
CPAB CPBA
DATA I/O
OPERATING MODE
OE
X
DIR
X
SAB
X
SBA
An
Input
Bn
74ALS646/74ALS646-1
Store A, B unspecified*
Store B, A unspecified*
Store A and B data
74ALS648/74ALS648-1
Store A, B unspecified*
Store B, A unspecified*
Store A and B data
↑
X
↑
X
↑
X
X
X
X
L
Unspecified*
Input
X
X
X
Unspecified*
Input
H
H
L
X
↑
X
Input
X
H or L H or L
X
Input
Input
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
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
L
X
X
X
H or L
X
X
Output
Output
Input
Input
L
L
X
H
X
X
Input
L
H
H
X
L
Output
Output
L
H or L
X
H
Input
NOTES:
H = High voltage level
L
X
*
=
=
=
Low voltage level
Don’t care
The data output function 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 pins will be stored on every Low-to-High transition of the clock.
Low-to-High clock transition
↑
=
5
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
UNIT
V
V
CC
Supply voltage
Input voltage
Input current
V
V
IN
IN
I
mA
V
V
OUT
Voltage applied to output in High output state
–0.5 to V
CC
All versions
-1 version
48
96
mA
mA
°C
°C
I
Current applied to output in Low output state
OUT
T
Operating free-air temperature range
Storage temperature range
0 to +70
amb
T
–65 to +150
stg
RECOMMENDED OPERATING CONDITIONS
LIMITS
NOM
5.0
PARAMETER
SYMBOL
UNIT
MIN
4.5
MAX
V
I
Supply voltage
5.5
V
V
CC
V
IH
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
2.0
V
IL
IK
0.8
–18
–15
24
V
mA
mA
mA
mA
°C
I
OH
All versions
-1 version
I
OL
Low-level output current
1
48
T
amb
Operating free-air temperature range
0
+70
NOTE:
1. The 48mA limit applies only under the condition of V = 5.0V ±5%.
CC
6
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
1
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
2
MIN
– 2
TYP
MAX
I
= –0.4mA
V
V
V
OH
CC
V
V
±10%, V = MAX,
IL
CC
= MIN
IH
I
= –3mA
2.4
3.2
OH
V
OH
High-level output voltage
V
V
= MIN, V = MAX,
IL
= MIN
CC
IH
I
= –15mA
2.0
V
OH
I
I
= 12mA
= 24mA
0.25
0.35
0.40
0.50
V
V
OL
V
V
= MIN, V = MAX,
IL
= MIN
CC
IH
All versions
-1 versions
OL
V
Low-level output voltage
Input clamp voltage
OL
V
V
= 4.75V, V = MAX,
IL
= MIN
CC
IH
I
OL
= 48mA
0.35
0.50
V
V
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= MIN, I = I
IK
–0.73
–1.5
0.1
0.1
20
V
IK
I
control inputs
A or B ports
= MAX, V = 7.0V
mA
mA
µA
I
Input current at maxi-
mum input voltage
I
I
= MAX, V = 5.5V
I
3
I
IH
High-level input current
= MAX, V = 2.7V
I
3
I
Low-level input current
= MAX, V = 0.4V
–0.1
–112
57
mA
mA
mA
mA
mA
IL
I
4
I
Output current
= MAX, V = 2.25V
–30
O
O
I
I
40
53
51
CCH
I
Supply current (total)
V
CC
= MAX
I
78
CC
CCL
72
CCZ
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V = 5V, T = 25°C.
CC
amb
3. For I/O ports, the parameter I and I include the off-state current.
IH
IL
4. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
AC ELECTRICAL CHARACTERISTICS FOR 74ALS646/74ALS646-1
LIMITS
T
V
= 0°C to +70°C
= +5.0V ± 10%
amb
CC
SYMBOL
PARAMETER
TEST CONDITION
UNIT
C = 50pF, R = 500Ω
L
L
MIN
100
MAX
f
Maximum clock frequency
Waveform 1
Waveform 1
MHz
ns
max
t
t
Propagation delay
CPBA to An, CPAB to Bn
5.0
6.0
13.0
13.0
PLH
PHL
t
t
Propagation delay
An to Bn or Bn to An
2.0
3.0
8.0
9.0
PLH
PHL
Waveform 2, 3
Waveform 2, 3
Waveform 2, 3
ns
ns
ns
ns
ns
ns
ns
t
t
Propagation delay
SBA to An or SAB to Bn (A or B Low)
5.0
5.0
13.0
11.0
PLH
PHL
t
t
Propagation delay
SBA to An or SAB to Bn (A or B High)
5.0
5.0
11.0
11.0
PLH
PHL
t
t
t
t
Output enable time
OE to An or Bn
Waveform 5
Waveform 6
3.0
5.0
9.0
11.0
PZH
t
PZL
Output disable time
OE to An or Bn
Waveform 5
Waveform 6
2.0
3.0
8.0
10.0
PHZ
t
PLZ
Output enable time
DIR to An or Bn
Waveform 5
Waveform 6
2.0
5.0
10.0
12.0
PZH
t
PZL
Output disable time
DIR to An or Bn
Waveform 5
Waveform 6
2.0
3.0
10.0
13.0
PHZ
t
PLZ
7
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
AC ELECTRICAL CHARACTERISTICS FOR 74ALS648/74ALS648-1
LIMITS
T
V
= 0°C to +70°C
= +5.0V ± 10%
amb
CC
SYMBOL
PARAMETER
TEST CONDITION
UNIT
C = 50pF, R = 500Ω
L
L
MIN
100
MAX
f
Maximum clock frequency
Waveform 1
Waveform 1
MHz
ns
max
t
t
Propagation delay
CPBA to An, CPAB to Bn
5.0
6.0
13.0
13.0
PLH
PHL
t
t
Propagation delay
An to Bn or Bn to An
1.0
3.0
7.0
9.0
PLH
PHL
Waveform 2, 3
Waveform 2, 3
Waveform 2, 3
ns
ns
ns
ns
ns
ns
ns
t
t
Propagation delay
SBA to An or SAB to Bn (A or B Low)
5.0
5.0
13.0
11.0
PLH
PHL
t
t
Propagation delay
SBA to An or SAB to Bn (A or B High)
4.0
5.0
11.0
11.0
PLH
PHL
t
t
t
t
Output enable time
OE to An or Bn
Waveform 5
Waveform 6
2.0
4.0
8.0
13.0
PZH
t
PZL
Output disable time
OE to An or Bn
Waveform 5
Waveform 6
1.0
2.0
8.0
10.0
PHZ
t
PLZ
Output enable time
DIR to An or Bn
Waveform 5
Waveform 6
3.0
5.0
10.0
12.0
PZH
t
PZL
Output disable time
DIR to An or Bn
Waveform 5
Waveform 6
2.0
2.0
11.0
11.0
PHZ
t
PLZ
AC SETUP REQUIREMENTS
LIMITS
T
V
= 0°C to +70°C
= +5.0V ± 10%
SYMBOL
PARAMETER
TEST CONDITION
amb
CC
UNIT
C = 50pF, R = 500Ω
L
L
t
t
(H)
(L)
Setup time, High or Low
An or Bn to CPAB or CPBA
5.0
5.0
su
su
Waveform 4
Waveform 4
Waveform 1
ns
ns
ns
t (H)
Hold time, High or Low
An or Bn to CPAB or CPBA
0.0
1.0
h
h
t (L)
t
t
(H)
(L)
Pulse width, High or Low
CPAB or CPBA
6.0
4.0
w
w
8
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
AC WAVEFORMS
For all waveforms, V = 1.3V.
M
The shaded areas indicate when the input is permitted to change for predictable output performance.
1/f
max
An or Bn
SBA or SAB
V
CPBA
V
M
M
or
CPAB
V
V
t
(H)
M
V
M
t
w
M
t
t
PLH
PHL
t
t
(L)
PLH
PHL
w
V
V
M
M
V
V
M
M
Bn or An
An or Bn
SF00395
An or Bn
SF00394
Waveform 2. Propagation Delay for An to Bn or Bn to An
and SAB or SBA to An or Bn
Waveform 1. Propagation Delay for Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
SBA or SAB
An or Bn
Bn or An
An or Bn
V
V
M
M
V
V
V
V
M
M
M
M
t
(L)
t (L)
h
t
(H)
t (H)
h
su
t
t
PHL
su
PLH
CPBA
or
CPAB
An or Bn
V
V
V
M
V
M
M
M
SF00397
SF00396
Waveform 3. Propagation Delay for An to Bn or Bn to An
and SAB or SBA to An or Bn
Waveform 4. Data Setup Time and Hold Times
OE
OE
V
V
M
V
t
V
M
M
M
DIR
DIR
V
-0.3V
0V
OH
t
t
PHZ
t
PZH
PZL
PLZ
3.5V
An or Bn
V
V
M
M
An or Bn
V
+0.3V
SF00398
OL
SF00399
Waveform 5. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
Waveform 6. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
9
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
TEST CIRCUIT AND WAVEFORMS
t
w
AMP (V)
0.3V
V
CC
90%
90%
7.0V
NEGATIVE
PULSE
V
V
M
M
10%
10%
V
V
OUT
R
R
IN
L
L
PULSE
GENERATOR
D.U.T.
t
t )
f
t
t )
THL ( f
TLH ( r
R
C
L
T
t
t )
t
t )
TLH ( r
THL ( f
AMP (V)
0.3V
90%
90%
POSITIVE
PULSE
Test Circuit for 3-State and Open Collector Outputs
SWITCH POSITION
V
V
M
M
10%
10%
t
w
TEST
, t
SWITCH
closed
t
PLZ PZL
Input Pulse Definition
INPUT PULSE REQUIREMENTS
open collector
All other
closed
open
Family
V
M
Rep.Rate
t
w
t
t
THL
Amplitude
DEFINITIONS:
TLH
R
L
C
L
R
T
=
=
=
Load resistor;
see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
Termination resistance should be equal to Z
pulse generators.
2.0ns
2.0ns
74ALS
3.5V
1.3V
1MHz
500ns
of
OUT
SC00126
10
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646–1
74ALS648/74ALS648–1
Transceiver/register
DIP24: plastic dual in-line package; 24 leads (300 mil)
SOT222-1
11
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646–1
74ALS648/74ALS648–1
Transceiver/register
SO24: plastic small outline package; 24 leads; body width 7.5 mm
SOT137-1
12
1991 Feb 08
Philips Semiconductors
Product specification
74ALS646/74ALS646–1
74ALS648/74ALS648–1
Transceiver/register
DEFINITIONS
Data Sheet Identification
Product Status
Definition
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Objective Specification
Formative or in Design
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.
Preliminary Specification
Product Specification
Preproduction Product
Full Production
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.
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. PhilipsSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertesting
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
orsystemswheremalfunctionofaPhilipsSemiconductorsandPhilipsElectronicsNorthAmericaCorporationProductcanreasonablybeexpected
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
Copyright Philips Electronics North America Corporation 1997
All rights reserved. Printed in U.S.A.
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Philips
Semiconductors
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