TOSHIBA TC74LCX646FS

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) VCC applications,
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: VCC = 2.0 to 3.6 V
·
High-speed operation: tpd = 7.0 ns (max) (VCC = 3.0 to 3.6 V)
·
Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)
·
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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TC74LCX646FS
Pin Assignment (top view)
IEC Logic Symbol
CAB
1
24
VCC
SAB
2
23
CBA
DIR
3
22
SBA
A1
4
21
OE
A2
5
20
B1
OE
DIR
CBA
SBA
CAB
SAB
A1
A3
6
19
B2
A4
7
18
B3
A5
8
17
B4
A2
A6
9
16
B5
A3
A7 10
15
B6
A8 11
14
B7
A4
A5
GND 12
13
B8
A6
A7
A8
2
21
3
23
22
1
2
4
5
G3
3EN1 [BA]
3EN2 [AB]
C4
G5
C6
G7
>
1
5
1
5
6D
7 >
1 7
4D
1
1
2
20
19
6
18
7
17
8
16
9
15
10
14
11
13
B1
B2
B3
B4
B5
B6
B7
B8
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TC74LCX646FS
Truth Table
Control Inputs
OE
H
DIR
Bus
CAB
CBA
SAB
SBA
X*
X*
X
X
X*
X*
X*
L
L
X
X
Input
Input
Z
Z
X
X
Input
Output
L
L
H
H
L
L
H
H
X
Qn
L
L
H
H
Output
Input
L
L
H
H
L
L
H
H
Qn
X
L
L
H
H
X
H
X*
X*
X*
X*
X*
X*
L
B
X
X
L
Function
A
H
H
X
X
X
X
L
L
L
X*
X*
X*
X
H
X
H
The output functions of A and B busses are
disabled.
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.
The data on the A bus are displayed on the
B bus.
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.
The data in the A storage flop-flops are
displayed on the B bus.
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.
The data on the B bus are displayed on the
A bus.
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.
The data in the B storage flip-flops are
displayed on the A bus.
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: 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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TC74LCX646FS
System Diagram
21
OE
3
DIR
A1
BA
4
D
Q
fA
CK
BB
20
Q
fB
D
B1
CK
A8
CAB
SAB
11
13
Same as above block
1
23
2
fA
22
fB
BA
B8
CBA
SBA
BB
Timing Chart
OE
DIR
SAB
SBA
CAB
CBA
A
B
A: Input
B: Output
: Don’t care
A: Output
B: Input
A: Z
B: Z
Z: High impedance
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TC74LCX646FS
Maximum Ratings
Characteristics
Power supply voltage
DC input voltage
(DIR, OE , CAB, CBA, SAB, SBA)
Symbol
Rating
Unit
VCC
-0.5 to 7.0
V
VIN
-0.5 to 7.0
V
-0.5 to 7.0 (Note 2)
DC bus I/O voltage
VI/O
-0.5 to VCC + 0.5
V
(Note 3)
Input diode current
IIK
-50
Output diode current
IOK
±50
DC output current
IOUT
±50
mA
Power dissipation
PD
180
mW
ICC/IGND
±100
mA
Tstg
-65 to 150
°C
DC VCC/ground current
Storage temperature
mA
(Note 4)
mA
Note 2: Output in OFF state
Note 3: High or low state. IOUT absolute maximum rating must be observed.
Note 4: VOUT < GND, VOUT > VCC
Recommended Operating Conditions
Characteristics
Power supply voltage
Input voltage
(DIR, OE , CAB, CBA, SAB, SBA)
Bus I/O voltage
Output current
Symbol
Rating
Unit
2.0 to 3.6
VCC
1.5 to 3.6
VIN
V
(Note 5)
0 to 5.5
VI/O
IOH/IOL
V
0 to 5.5
(Note 6)
0 to VCC
(Note 7)
±24
(Note 8)
±12
(Note 9)
Operating temperature
Topr
-40 to 85
Input rise and fall time
dt/dv
0 to 10
V
mA
°C
(Note 10)
ns/V
Note 5: Data retention only
Note 6: Output in OFF state
Note 7: High or low state
Note 8: VCC = 3.0 to 3.6 V
Note 9: VCC = 2.7 to 3.0 V
Note 10: VIN = 0.8 to 2.0 V, VCC = 3.0 V
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TC74LCX646FS
Electrical Characteristics
DC Characteristics (Ta = -40 to 85°C)
Characteristics
Symbol
Test Condition
Min
Max
Unit
VCC (V)
Input voltage
H-level
VIH
¾
2.7 to 3.6
2.0
¾
L-level
VIL
¾
2.7 to 3.6
¾
0.8
IOH = -100 mA
2.7 to 3.6
VCC
- 0.2
¾
IOH = -12 mA
2.7
2.2
¾
IOH = -18 mA
3.0
2.4
¾
IOH = -24 mA
3.0
2.2
¾
IOL = 100 mA
2.7 to 3.6
¾
0.2
IOL = 12 mA
2.7
¾
0.4
IOL = 16 mA
3.0
¾
0.4
H-level
VOH
VIN = VIH or VIL
Output voltage
VOL
VIN = VIH or VIL
Input leakage current
IIN
VIN = 0 to 5.5 V
3-state output OFF state current
IOZ
Power-off leakage current
IOFF
Quiescent supply current
ICC
L-level
IOL = 24 mA
Increase in Icc per input
DICC
V
V
3.0
¾
0.55
2.7 to 3.6
¾
±5.0
mA
2.7 to 3.6
¾
±5.0
mA
VIN/VOUT = 5.5 V
0
¾
10.0
mA
VIN = VCC or GND
2.7 to 3.6
¾
10.0
VIN/VOUT = 3.6 to 5.5 V
2.7 to 3.6
¾
±10.0
VIH = VCC - 0.6 V
2.7 to 3.6
¾
500
VIN = VIH or VIL
VOUT = 0 to 5.5 V
6
mA
2002-01-11
TC74LCX646FS
AC Characteristics (Ta = -40 to 85°C)
Characteristics
Symbol
Test Condition
Min
Max
2.7
¾
¾
3.3 ± 0.3
150
¾
Unit
VCC (V)
Maximum clock frequency
Propagation delay time
(An, Bn-Bn, An)
Propagation delay time
(CAB, CBA-Bn, An)
Propagation delay time
(SAB, SBA-Bn, An)
Output enable time
( OE , DIR-An, Bn)
Output disable time
( OE , DIR-An, Bn)
Minimum pulse width
fmax
tpLH
Figure 1, Figure 2
Figure 1, Figure 2
tpHL
tpLH
Figure 1, Figure 5
tpHL
tpLH
Figure 1, Figure 2
tpHL
tpZL
tPZH
tpLZ
Figure 1, Figure 3, Figure 4
Figure 1, Figure 3, Figure 4
tpHZ
tW (H)
Figure 1, Figure 5
tW (L)
Minimum setup time
Minimum hold time
Output to output skew
ts
Figure 1, Figure 5
th
Figure 1, Figure 5
tosLH
(Note 10)
tosHL
2.7
¾
8.0
3.3 ± 0.3
1.5
7.0
2.7
¾
9.5
3.3 ± 0.3
1.5
8.5
2.7
¾
9.5
3.3 ± 0.3
1.5
8.5
2.7
¾
9.5
3.3 ± 0.3
1.5
8.5
2.7
¾
9.5
3.3 ± 0.3
1.5
8.5
2.7
3.3
¾
3.3 ± 0.3
3.3
¾
2.7
2.5
¾
3.3 ± 0.3
2.5
¾
2.7
1.5
¾
3.3 ± 0.3
1.5
¾
2.7
¾
¾
3.3 ± 0.3
¾
1.0
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note 10: Parameter guaranteed by design.
(tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|)
Dynamic Switching Characteristics
(Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 W)
Characteristics
Symbol
Test Condition
Typ.
Unit
VCC (V)
Quiet output maximum
dynamic VOL
VOLP
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Quiet output minimum
dynamic VOL
|VOLV|
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Typ.
Unit
Capacitive Characteristics (Ta = 25°C)
Characteristics
Symbol
Test Condition
VCC (V)
Input capacitance
CIN
DIR, OE , CAB, CBA, SAB, SBA
3.3
7
pF
Bus input capacitance
CI/O
An, Bn
3.3
8
pF
Power dissipation capacitance
CPD
fIN = 10 MHz
3.3
25
pF
(Note 11)
Note 11: CPD 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:
ICC (opr) = CPD・VCC・fIN + ICC/8 (per bit)
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TC74LCX646FS
AC Test Circuit
RL
Switch
Parameter
Switch
tpLH, tpHL
Open
tpLZ, tpZL
6.0 V
tpHZ, tpZH
GND
tw, ts, th, fmax
Open
RL
Measure
CL
Output
Open
6.0 V
GND
CL = 50 pF
RL = 500 W
Figure 1
AC Waveform
tr 2.5 ns
tf 2.5 ns
2.7 V
90%
1.5 V
Input
(An, Bn, SAB, SBA)
10%
GND
VOH
Output
(Bn, An)
1.5 V
Figure 2
VOL
tpHL
tpLH
tpLH, tpHL
tr 2.5 ns
tf 2.5 ns
2.7 V
90%
1.5 V
Output Disable
( OE )
10%
tpLZ
GND
tpZL
3.0 V
Output (An, Bn)
Low to Off to Low
1.5 V
tpHZ
VOL
+ 0.3 V
VOL
tpZH
VOH
VOH - 0.3 V
Output (An, Bn)
High to Off to High
1.5 V
GND
Outputs
enabled
Figure 3
Outputs
disabled
Outputs
enabled
tpLZ, tpHZ, tpZL, tpZH
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TC74LCX646FS
tf 2.5 ns
tr 2.5 ns
2.7 V
90%
1.5 V
10%
Input
(DIR)
GND
VOH
Output
(An)
1.5 V
VOL + 0.3 V
tpZL
tpLZ
VOH - 0.3 V
Output
(An)
VOL
VOH
1.5 V
tpZH
VOL
tpHZ
tpLZ
Output
(Bn)
VOH
1.5 V
VOL + 0.3 V
VOL
tpZL
Output
(Bn)
tpHZ
VOH
VOH - 0.3 V
1.5 V
VOL
tpZH
Figure 4
tr 2.5 ns
Input
(CAB, CBA)
tpLZ, tpHZ, tpZL, tpZH
tf 2.5 ns
2.7 V
90%
1.5 V
10%
tW (H)
tW (L)
GND
2.7 V
Input
(An, Bn)
1.5 V
ts (H)
th (H)
ts (L)
th (L)
GND
VOH
Output
(Bn, An)
1.5 V
tpHL
VOL
tpLH
Figure 5
tpLH, tpHL, tw, ts, th
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TC74LCX646FS
Package Dimensions
Weight: 0.14 g (typ.)
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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.
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