TC74HC646AP_07 [TOSHIBA]
CMOS Digital Integrated Circuit Silicon Monolithic Octal Bus Transceiver/Register (3-state); CMOS数字集成电路硅单片八路总线收发器/寄存器（三态）
| 型号： | TC74HC646AP_07 |
| 厂家： | 
TOSHIBA |
| 描述： | CMOS Digital Integrated Circuit Silicon Monolithic Octal Bus Transceiver/Register (3-state) |
| 文件： | 总8页 (文件大小：337K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC74HC646AP
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC646AP
Octal Bus Transceiver/Register (3-state)
The TC74HC646A is high speed CMOS OCTAL BUS
TRANSCEIVER/REGISTERs fabricated with silicon gate C2MOS
technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
This device is bus transceiver with 3-state outputs, D-type
flip-flops, and control circuitry arranged for multiplexed
transmission of data directly from the internal registers.
When the direction input (DIR) is held high, the A1 thru A8
become inputs and the B1 thru B8 become outputs. When the
DIR input is held low, the A1 thru A8 become output and the B1
thru B8 become inputs.
Weight: 1.50 g (typ.)
The enable input G is held high, both the A Bus and B Bus become high impedance.
The select inputs (SAB, SBA) can muiltiplex stored and real-time (transparent mode) data.
Data on the A Bus or B Bus can be clocked into the registers on the positive going transition of either CAB or
CBA clock inputs, respectively.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
Features (Note 1) (Note 2)
•
•
•
•
•
•
•
•
High speed: f
= 73 MHz (typ.) at V
= 5 V
max
CC
Low power dissipation: I
= 4 μA (max) at Ta = 25°C
CC
High noise immunity: V
= V
= 28% V
(min)
NIH
NIL
CC
Output drive capability: 15 LSTTL loads
Symmetrical output impedance: |I | = I
= 6 mA (min)
OL
OH
∼
−
Balanced propagation delays: t
t
pHL
pLH
Wide operating voltage range: V
(opr) = 2 to 6 V
CC
Pin and function compatible with 74LS646
Note 1: Do not apply a signal to any bus terminal when it is in the out put mode. Damage may result.
Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull
down resistors.
Pin Assignment
1
2007-10-01
TC74HC646AP
IEC Logic Symbol
Truth Table
G
DIR
CAB
X
CBA
X
SAB
X
SBA
X
A
B
Function
Inputs
Z
Inputs
Z
The output functions of A and B busses are
disabled.
(Note)
(Note)
H
X
Both A and B busses are used as inputs to the
internal flip-flops. Data on the bus will be stored
on the rising edge of the clock.
X
L
X
X
X
X
Inputs
Outputs
X
X
X
L
L
The data on the A bus are displayed on the B bus.
(Note)
H
H
The data on the A bus are displayed on the B bus,
and are stored into the A storage flip-flops on the
rising edge of CAB.
X
L
L
L
H
H
X
X
X
(Note)
H
H
L
H
X
The data in the A storage flip-flops are displayed
on the B bus.
X
Qn
(Note)
The data on the A bus are stored into the A
storage flip-flops on the rising edge of CAB, and
the stored data propagate directly onto the B bus.
X
L
L
(Note)
H
H
Outputs
Inputs
X
X
X
L
L
L
The data on the B bus are displayed on the A bus.
(Note)
(Note)
H
H
The data on the B bus are displayed on the A bus,
and are stored into the B storage flip-flops on the
rising edge of CBA.
X
L
L
X
X
X
L
H
H
(Note)
H
H
L
L
X
X
The data in the B storage flip-flops are displayed
on the A bus.
Qn
X
(Note)
(Note)
The data on the B bus are stored into the B
storage flip-flops on the rising edge of CBA, and
the stored data propagate directly onto the A bus.
X
L
L
(Note)
H
H
X: Don’t care
Qn: The data stored into the internal flip-flops by most recent low to high transition of the clock inputs.
Z: High impedance
Note:
The clocks are not internally gated with either G or DIR. Therefore, data on the A and/or B busses may be
clocked into the storage flip-flops at any time.
2
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TC74HC646AP
Timing Chart
System Diagram
3
2007-10-01
TC74HC646AP
Absolute Maximum Ratings (Note 1)
Characteristics
Supply voltage range
Symbol
Rating
Unit
V
−0.5 to 7
V
V
CC
DC input voltage
V
−0.5 to V
+ 0.5
IN
CC
CC
DC output voltage
Input diode current
Output diode current
DC output current
V
−0.5 to V
+ 0.5
V
OUT
I
±20
mA
mA
mA
mA
mW
°C
IK
I
±20
±35
±75
500
OK
I
OUT
DC V /ground current
CC
I
CC
Power dissipation
P
(Note 2)
D
Storage temperature
T
stg
−65 to 150
Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Note 2: 500 mW in the range of Ta = −40 to 65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C shall be
applied until 300 mW.
Operating Ranges (Note)
Characteristics
Supply voltage
Symbol
Rating
2 to 6
Unit
V
V
V
CC
Input voltage
V
0 to V
0 to V
IN
CC
CC
Output voltage
V
V
OUT
Operating temperature
T
opr
−40 to 85
°C
0 to 1000 (V
= 2.0 V)
CC
CC
CC
Input rise and fall time
t , t
0 to 500 (V
0 to 400 (V
= 4.5 V)
= 6.0 V)
ns
r
f
Note:
The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND.
4
2007-10-01
TC74HC646AP
Electrical Characteristics
DC Characteristics
Ta = −40 to
Test Condition
Ta = 25°C
85°C
Characteristics
Symbol
Unit
V
(V)
CC
Min
Typ.
Max
Min
Max
2.0
1.50
3.15
4.20
⎯
⎯
⎯
⎯
⎯
1.50
3.15
4.20
⎯
⎯
⎯
High-level input
voltage
V
⎯
⎯
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
V
V
IH
⎯
⎯
⎯
⎯
0.50
1.35
1.80
⎯
0.50
1.35
1.80
⎯
Low-level input
voltage
V
⎯
⎯
⎯
IL
⎯
⎯
⎯
1.9
4.4
5.9
4.18
5.68
⎯
2.0
4.5
6.0
4.31
5.80
0.0
0.0
0.0
0.17
0.18
1.9
4.4
5.9
4.13
5.63
⎯
I
= −20 μA
⎯
⎯
OH
V
IN
= V or
IL
High-level output
voltage
V
⎯
⎯
V
OH
IH
V
I
I
= −6 mA
⎯
⎯
OH
= −7.8 mA
⎯
⎯
OH
0.1
0.1
0.1
0.26
0.26
0.1
0.1
0.1
0.33
0.33
I
= 20 μA
⎯
⎯
OL
V
IN
Low-level output
voltage
V
= V or
IL
⎯
⎯
V
OL
IH
V
I
I
= 6 mA
⎯
⎯
OL
= 7.8 mA
⎯
⎯
OL
V
V
= V or V
IH
IN
IL
3-state output
off-state current
I
6.0
⎯
⎯
±0.5
⎯
±5.0
μA
OZ
= V
or GND
CC
OUT
Input leakage
current
I
V
V
= V
or GND
6.0
6.0
⎯
⎯
⎯
⎯
±0.1
⎯
⎯
±1.0
μA
μA
IN
IN
IN
CC
CC
Quiescent supply
current
I
= V
or GND
4.0
40.0
CC
Timing Requirements (input: t = t = 6 ns)
r
f
Ta =
−40 to
85°C
Test Condition
Ta = 25°C
Characteristics
Symbol
Unit
ns
V
(V)
Typ.
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Limit
75
15
13
50
10
9
Limit
95
19
16
65
13
11
5
CC
2.0
Minimum pulse width
(CK)
t
W (H)
⎯
⎯
⎯
⎯
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
t
W (L)
Minimum set-up time
Minimum hold time
Clock frequency
t
ns
s
5
t
5
5
ns
h
5
5
6
5
f
31
36
25
29
MHz
5
2007-10-01
TC74HC646AP
AC Characteristics (input: t = t = 6 ns)
r
f
Ta = −40 to
Test Condition
Ta = 25°C
85°C
Characteristics
Symbol
Unit
CL
(pF)
V
CC
(V)
Min
Typ.
Max
Min
Max
2.0
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
25
7
60
12
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
75
15
t
t
TLH
THL
Output transition time
⎯
⎯
50
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
ns
ns
6
10
13
74
21
18
91
26
22
98
28
24
116
33
28
81
23
20
98
28
24
84
24
20
102
29
25
60
23
20
19
67
79
5
150
30
190
38
50
150
50
Propagation delay
time
t
t
26
32
pLH
pHL
190
38
240
48
(BUS-bus)
32
41
210
42
265
53
Propagation delay
time
t
t
36
45
pLH
pHL
⎯
ns
ns
ns
250
50
315
63
(CAB, CBA-bus)
150
50
43
54
170
34
215
43
Propagation delay
time
t
t
29
37
pLH
pHL
⎯
210
42
265
53
(SAB, SBA-bus)
150
50
36
45
175
35
220
44
Output enable time
( G , DIR-bus)
t
t
30
37
pZL
R
= 1 kΩ
L
215
43
270
54
pZH
150
50
37
46
175
35
220
44
Output disable time
( G , DIR-bus)
t
pLZ
R
L
= 1 kΩ
ns
t
pHZ
30
37
⎯
⎯
Maximum clock
frequency
f
⎯
50
31
36
⎯
⎯
⎯
25
29
⎯
⎯
⎯
MHz
max
⎯
⎯
Input capacitance
Output capacitance
C
⎯
⎯
10
10
pF
pF
IN
I/O
PD
C
C
13
⎯
⎯
Power dissipation
capacitance
⎯
⎯
39
⎯
⎯
⎯
pF
(Note)
Note:
C
is defined as the value of the internal equivalent capacitance which is calculated from the operating
PD
current consumption without load.
Average operating current can be obtained by the equation:
I
(opr) = C ･V ･f + I /8 (per bit)
PD CC IN CC
CC
6
2007-10-01
TC74HC646AP
Package Dimensions
Weight: 1.50 g (typ.)
7
2007-10-01
TC74HC646AP
RESTRICTIONS ON PRODUCT USE
20070701-EN GENERAL
• The information contained herein is subject to change without notice.
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc.
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.).These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in his
document shall be made at the customer’s own risk.
• The products described in this document shall not be used or embedded to any downstream products of which
manufacture, use and/or sale are prohibited under any applicable laws and regulations.
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which
may result from its use. No license is granted by implication or otherwise under any patents or other rights of
TOSHIBA or the third parties.
• Please contact your sales representative for product-by-product details in this document regarding RoHS
compatibility. Please use these products in this document in compliance with all applicable laws and regulations
that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses
occurring as a result of noncompliance with applicable laws and regulations.
8
2007-10-01
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