TC74LCX646FS [TOSHIBA]
Low-Voltage Octal Bus Transceiver/Register with 5-V Tolerant Inputs and Outputs; 低电压八路总线收发器/寄存器与5V容限输入和输出
| 型号： | TC74LCX646FS |
| 厂家： | 
TOSHIBA |
| 描述： | Low-Voltage Octal Bus Transceiver/Register with 5-V Tolerant Inputs and Outputs |
| 文件： | 总11页 (文件大小：164K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC74LCX646FS
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74LCX646FS
Low-Voltage Octal Bus Transceiver/Register with 5-V Tolerant Inputs and Outputs
The TC74LCX646FS is a high performance CMOS octal bus
transceiver/register. Designed for use in 3.3-V systems, it
achieves high-speed operation while maintaining the CMOS low
power dissipation.
The device is designed for low-voltage (3.3 V) V
applications,
CC
but it could be used to interface to 5-V supply environment for
both inputs and outputs.
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.
All inputs are equipped with protection circuits against static
discharge.
Weight: 0.14 g (typ.)
Features
·
·
·
·
·
·
·
·
Low-voltage operation: V = 2.0 to 3.6 V
CC
High-speed operation: t = 7.0 ns (max) (V
= 3.0 to 3.6 V)
= 24 mA (min) (V = 3.0 V)
pd CC
Output current: |I |/I
OH OL CC
Latch-up performance: ±500 mA
Available in SSOP
Bidirectional interface between 5.0 V and 3.3 V signals
Power-down protection provided on all inputs
Pin and function compatible with the 74 series (74AC/HC/F/ALS/LS etc.) 646 type
Note 1: Do not apply a signal to any bus pins when it is in the output mode. Damage may result.
All floating (high impedance) bus pins must have their input levels fixed by means of pull-up or pull-down
resistors.
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2002-01-11
TC74LCX646FS
Pin Assignment (top view)
IEC Logic Symbol
21
OE
G3
3
CAB
SAB
DIR
A1
1
2
3
4
5
6
7
8
9
24
V
CC
DIR
3EN1 [BA]
3EN2 [AB]
23 CBA
22 SBA
23
22
1
CBA
SBA
CAB
SAB
C4
G5
C6
2
21
OE
G7
A2
20 B1
19 B2
18 B3
17 B4
16 B5
15 B6
14 B7
13 B8
20
>
4
1
5
4D
B1
A1
A3
1
5
>
1
6D
7
1
2
A4
1 7
5
6
19
18
17
16
15
14
13
A2
A3
A4
A5
A6
A7
A8
B2
B3
B4
B5
B6
B7
B8
A5
A6
7
A7 10
A8 11
8
GND 12
9
10
11
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2002-01-11
TC74LCX646FS
Truth Table
Control Inputs
Bus
Function
OE
H
DIR
CAB
CBA
SAB
X
SBA
X
A
Input
Z
B
Input
Z
The output functions of A and B busses are
disabled.
X*
X*
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
Input
Output
The data on the A bus are displayed on the
B bus.
X*
X*
X*
L
H
L
L
H
L
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*
X*
L
X
X
H
H
L
H
The data in the A storage flop-flops are
displayed on the B bus.
H
X
L
Qn
L
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*
X*
H
X
X
L
H
H
Output
Input
The data on the B bus are displayed on the
A bus.
X*
L
H
L
L
H
L
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*
X*
X
X
L
H
H
L
L
The data in the B storage flip-flops are
displayed on the A bus.
X*
H
Qn
L
X
L
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*
X
H
H
H
X: Don’t care
Z: High impedance
Qn: The data stored into the internal flip-flops by most recent low to high transition of the clock inputs.
*: The clocks are not internally with either OE or DIR.
Therefore, data on the A and/or B busses may be clocked into the storage flip-flops at any time.
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2002-01-11
TC74LCX646FS
System Diagram
21
OE
3
DIR
BA
fA
4
A1
D
Q
CK
BB
fB
20
B1
Q
D
CK
11
13
23
22
Same as above block
A8
B8
1
CAB
CBA
SBA
2
SAB
fA
fB
BA
BB
Timing Chart
OE
DIR
SAB
SBA
CAB
CBA
A
B
A: Input
A: Output
B: Input
A: Z
B: Z
B: Output
: Don’t care
Z: High impedance
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2002-01-11
TC74LCX646FS
Maximum Ratings
Characteristics
Symbol
Rating
Unit
V
Power supply voltage
V
-0.5 to 7.0
CC
DC input voltage
V
-0.5 to 7.0
V
IN
(DIR, OE , CAB, CBA, SAB, SBA)
-0.5 to 7.0 (Note 2)
DC bus I/O voltage
V
I
V
-0.5 to V
+ 0.5
I/O
CC
(Note 3)
Input diode current
Output diode current
DC output current
Power dissipation
-50
mA
mA
mA
mW
mA
°C
IK
I
±50
±50
(Note 4)
OK
I
OUT
P
180
D
DC V /ground current
CC
I
/I
±100
CC GND
Storage temperature
T
-65 to 150
stg
Note 2: Output in OFF state
Note 3: High or low state. I
absolute maximum rating must be observed.
OUT
Note 4: V
OUT
< GND, V
OUT
> V
CC
Recommended Operating Conditions
Characteristics
Symbol
Rating
Unit
V
2.0 to 3.6
Power supply voltage
V
CC
1.5 to 3.6 (Note 5)
Input voltage
V
0 to 5.5
V
V
IN
(DIR, OE , CAB, CBA, SAB, SBA)
0 to 5.5 (Note 6)
Bus I/O voltage
Output current
V
I/O
0 to V
(Note 7)
(Note 8)
(Note 9)
CC
±24
±12
I
/I
mA
OH OL
Operating temperature
Input rise and fall time
T
-40 to 85
°C
opr
dt/dv
0 to 10 (Note 10)
ns/V
Note 5: Data retention only
Note 6: Output in OFF state
Note 7: High or low state
Note 8: V
Note 9: V
= 3.0 to 3.6 V
= 2.7 to 3.0 V
CC
CC
Note 10: V = 0.8 to 2.0 V, V
IN CC
= 3.0 V
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2002-01-11
TC74LCX646FS
Electrical Characteristics
DC Characteristics (Ta = -40 to 85°C)
Characteristics
Symbol
Test Condition
Min
Max
Unit
V
V
(V)
CC
H-level
V
¾
¾
2.7 to 3.6
2.7 to 3.6
2.0
¾
IH
Input voltage
L-level
H-level
V
¾
0.8
IL
V
CC
I
= -100 mA
2.7 to 3.6
¾
OH
- 0.2
2.2
2.4
2.2
¾
I
I
I
I
I
I
I
= -12 mA
= -18 mA
= -24 mA
= 100 mA
= 12 mA
= 16 mA
= 24 mA
2.7
3.0
¾
¾
OH
OH
OH
OL
OL
OL
OL
V
V
V
= V or V
IH
OH
IN
IN
IL
IL
3.0
¾
Output voltage
V
2.7 to 3.6
2.7
0.2
0.4
0.4
0.55
±5.0
¾
L-level
V
= V or V
IH
OL
3.0
¾
3.0
¾
Input leakage current
I
V
V
V
V
V
V
V
= 0 to 5.5 V
2.7 to 3.6
¾
mA
mA
mA
IN
IN
= V or V
IL
IN
IH
3-state output OFF state current
Power-off leakage current
Quiescent supply current
Increase in Icc per input
I
2.7 to 3.6
¾
±5.0
OZ
= 0 to 5.5 V
OUT
I
/V = 5.5 V
IN OUT
0
¾
¾
¾
¾
10.0
10.0
±10.0
500
OFF
= V
or GND
CC
2.7 to 3.6
2.7 to 3.6
2.7 to 3.6
IN
I
CC
mA
/V
IN OUT
= 3.6 to 5.5 V
- 0.6 V
DI
= V
CC
CC
IH
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2002-01-11
TC74LCX646FS
AC Characteristics (Ta = -40 to 85°C)
Characteristics
Symbol
Test Condition
Min
Max
Unit
MHz
ns
V
(V)
CC
2.7
¾
¾
¾
Maximum clock frequency
f
Figure 1, Figure 2
max
3.3 ± 0.3 150
Propagation delay time
(An, Bn-Bn, An)
t
t
2.7
3.3 ± 0.3
2.7
¾
1.5
¾
8.0
7.0
9.5
8.5
9.5
8.5
9.5
8.5
9.5
8.5
¾
pLH
pHL
Figure 1, Figure 2
Propagation delay time
(CAB, CBA-Bn, An)
t
t
pLH
pHL
Figure 1, Figure 5
ns
3.3 ± 0.3
2.7
1.5
¾
Propagation delay time
(SAB, SBA-Bn, An)
t
t
pLH
pHL
Figure 1, Figure 2
ns
3.3 ± 0.3
2.7
1.5
¾
Output enable time
t
pZL
Figure 1, Figure 3, Figure 4
Figure 1, Figure 3, Figure 4
Figure 1, Figure 5
ns
( OE , DIR-An, Bn)
t
t
PZH
3.3 ± 0.3
2.7
1.5
¾
Output disable time
t
pLZ
ns
( OE , DIR-An, Bn)
3.3 ± 0.3
2.7
1.5
3.3
3.3
2.5
2.5
1.5
1.5
¾
pHZ
t
(H)
(L)
W
Minimum pulse width
Minimum setup time
Minimum hold time
Output to output skew
ns
t
3.3 ± 0.3
2.7
¾
W
¾
t
Figure 1, Figure 5
ns
s
3.3 ± 0.3
2.7
¾
¾
t
Figure 1, Figure 5
ns
h
3.3 ± 0.3
2.7
¾
t
¾
osLH
osHL
(Note 10)
ns
t
3.3 ± 0.3
¾
1.0
Note 10: Parameter guaranteed by design.
(t = |t - t |, t = |t - t
pHLm
|)
pHLn
osLH
pLHm
pLHn osHL
Dynamic Switching Characteristics
(Ta = 25°C, input: t = t = 2.5 ns, C = 50 pF, R = 500 W)
r
f
L
L
Characteristics
Symbol
Test Condition
Typ.
Unit
V
(V)
CC
Quiet output maximum
V
V
= 3.3 V, V = 0 V
3.3
3.3
0.8
0.8
V
V
OLP
OLV
IH
IH
IL
dynamic V
OL
Quiet output minimum
dynamic V
|V
|
V
= 3.3 V, V = 0 V
IL
OL
Capacitive Characteristics (Ta = 25°C)
Characteristics
Symbol
Test Condition
Typ.
Unit
V
(V)
CC
Input capacitance
C
DIR, OE , CAB, CBA, SAB, SBA
An, Bn
3.3
3.3
3.3
7
8
pF
pF
pF
IN
I/O
PD
Bus input capacitance
C
C
Power dissipation capacitance
f
= 10 MHz
(Note 11)
25
IN
Note 11: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
= C ･V ･f + I /8 (per bit)
PD CC IN CC
CC (opr)
7
2002-01-11
TC74LCX646FS
AC Test Circuit
Open
6.0 V
GND
Switch
Parameter
, t
Switch
t
Open
6.0 V
GND
Open
pLH pHL
Output
Measure
t
, t
pLZ pZL
t
, t
pHZ pZH
C
= 50 pF
= 500 W
L
t , t , t , f
w s h max
R
L
Figure 1
AC Waveform
t 2.5 ns
r
t 2.5 ns
f
2.7 V
GND
90%
1.5 V
Input
(An, Bn, SAB, SBA)
10%
V
V
OH
OL
Output
(Bn, An)
1.5 V
t
t
pHL
pLH
Figure 2 t
, t
pLH pHL
t 2.5 ns
r
t 2.5 ns
f
2.7 V
90%
1.5 V
Output Disable
( OE )
10%
GND
3.0 V
t
t
t
pLZ
pZL
Output (An, Bn)
Low to Off to Low
1.5 V
V
OL
+ 0.3 V
V
V
OL
t
pHZ
pZH
OH
V
- 0.3 V
OH
Output (An, Bn)
1.5 V
High to Off to High
GND
Outputs
enabled
Outputs
disabled
Outputs
enabled
Figure 3 t
, t
, t
, t
pLZ pHZ pZL pZH
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2002-01-11
TC74LCX646FS
t 2.5 ns
f
t 2.5 ns
r
2.7 V
90%
1.5 V
10%
Input
(DIR)
GND
V
V
V
V
V
V
V
V
OH
OL
OH
OL
OH
OL
OH
OL
Output
(An)
1.5 V
1.5 V
V
+ 0.3 V
- 0.3 V
OL
t
t
t
t
pZL
pZH
pLZ
V
OH
Output
(An)
pHZ
t
t
pLZ
Output
(Bn)
1.5 V
V
+ 0.3 V
OL
t
pZL
V
- 0.3 V
OH
Output
(Bn)
pHZ
1.5 V
t
pZH
Figure 4 t
, t
, t
, t
pLZ pHZ pZL pZH
t 2.5 ns
r
t 2.5 ns
f
2.7 V
GND
2.7 V
GND
90%
1.5 V
Input
(CAB, CBA)
10%
t
W
(H)
t
W
(L)
Input
1.5 V
t (H)
(An, Bn)
t (H)
h
t (L)
s
t (L)
h
s
V
V
OH
OL
Output
(Bn, An)
1.5 V
t
t
pLH
pHL
Figure 5 t
, t
, t , t , t
pLH pHL w s h
9
2002-01-11
TC74LCX646FS
Package Dimensions
Weight: 0.14 g (typ.)
10
2002-01-11
TC74LCX646FS
RESTRICTIONS ON PRODUCT USE
000707EBA
· 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 this
document shall be made at the customer’s own risk.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
· The information contained herein is subject to change without notice.
11
2002-01-11
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