TC7MBL3245BFK [TOSHIBA]
Octal Low Voltage Bus Switch; 八通道低电压总线开关
| 型号： | TC7MBL3245BFK |
| 厂家： | 
TOSHIBA |
| 描述： | Octal Low Voltage Bus Switch |
| 文件： | 总8页 (文件大小：269K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC7MBL3245BFT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC7MBL3245BFT, TC7MBL3245BFK
Octal Low Voltage Bus Switch
The TC7MBL3245B provides eight bits of low-voltage,
high-speed bus switching in a standard ’245 device pinout. The
low ON-resistance of the switch allows connections to be made
with minimal propagation delay and while maintaining CMOS
low power dissipation.
TC7MBL3245BFT
The device comprises a single 8-bit switch. When output enable
( OE ) is low, the switch is on and port A is connected to port B.
When OE is high, the switch is open and a high-impedance
state exists between the two ports.
All inputs are equipped with protection circuits to guard
against static discharge.
TC7MBL3245BFK
Features
•
•
•
•
Operating voltage: V
= 1.65~3.6 V
CC
Low capacitance: CI/O=19pF Switch On (typ.) @3V
Low ON-resistance: R = 4 Ω (typ.) @3V
ON
ESD performance:Machine model ≥ ±200 V
Human body model ≥ ±2000 V
•
•
•
Power-down protection for inputs ( OE input only)
Package: TSSOP20,VSSOP (US20)
Pin compatible with the 74xx245 type
Weight:
TSSOP20-P-0044-0.65A
VSSOP20-P-0030-0.50
: 0.08 g (typ.)
: 0.03 g (typ.)
Pin Assignment (top view)
1
2
3
4
5
6
7
8
9
20
V
CC
NC
A1
A2
A3
19 OE
18
17
B1
B2
16 B3
A4
A5
A6
A7
A8
15
14
13
12
11
B4
B5
B6
B7
B8
GND 10
(top view)
NC-No Internal Connection
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TC7MBL3245BFT/FK
Truth Table
Inputs
OE
L
Function
A port = B port
H
Disconnect
System Diagram
A1
A8
B1
B8
OE
Absolute Maximum Ratings (Note)
Characteristic
Power supply range
Symbol
V
Rating
Unit
−0.5~4.6
−0.5~4.6
−0.5~Vcc+0.5
−50
V
V
V
CC
Control pin input voltage
V
IN
Switch terminal I/O voltage
V
S
Clump diode
current
Control input pin
Switch terminal
I
mA
IK
±50
Switch I/O current
Power dissipation
I
128
mA
mW
mA
°C
S
P
180
D
DC V /GND current
CC
I
/I
±100
CC GND
Storage temperature
T
stg
−65~150
Note: 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).
Operating Ranges (Note)
Characteristic
Power supply voltage
Symbol
Rating
Unit
V
1.65~3.6
0~3.6
V
V
CC
Control pin input voltage
Switch I/O voltage
V
IN
V
0~Vcc
−40~85
0~10
V
S
Operating temperature
Input rise and fall time
T
opr
°C
ns/V
dt/dv
Note: The operating ranges must be maintained to ensure the normal operation of the device.
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TC7MBL3245BFT/FK
Electrical Characteristics
DC Characteristics (Ta = −40 to 85°C)
Characteristic
Symbol
Test Condition
Min
Typ.
⎯
Max
Unit
V
(V)
CC
0.7 ×
High-level control input voltage
Low-level control input voltage
V
⎯
⎯
1.65 to 3.6
1.65 to 3.6
⎯
IH
V
CC
V
0.3 ×
V
⎯
⎯
IL
V
CC
Control input current
I
V
= 0 to 3.6 V
1.65 to 3.6
0
⎯
⎯
⎯
⎯
±1.0
μA
μA
IN
IN
Power off leakage current
I
OE = 0 to 3.6 V
1.0
OFF
Off-stage leakage current
(switch off)
I
A, B = 0 to V , OE = V
CC
1.65 to 3.6
⎯
⎯
±1.0
μA
SZ
CC
V
V
V
V
V
V
V
= 0 V, I = 30 mA
IS
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
3.0
3.0
3.0
2.3
2.3
2.3
3.6
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
6
7
9
IS
IS
IS
IS
IS
IS
IN
= 3.0 V, I = 30 mA
IS
= 2.4 V, I = 15 mA
IS
7
12
8
Switch ON-resistance
(Note 2)
R
Ω
ON
= 0 V, I = 24 mA
IS
4
= 2.3 V, I = 24 mA
IS
7
11
13
10
= 2.0 V, I = 24 mA
IS
8
Quiescent supply current
I
= V
or GND, I
= 0
OUT
⎯
μA
CC
CC
Note 1: All typical values are at Ta = 25°C.
Note 2: Measured by voltage drop between A and B pins at indicated current through the switch. ON-resistance is
determined by the lower of the voltages on the two pins (A or B).
AC Characteristics (Ta = −40 to 85°C)
Characteristic
Symbol
Test Condition
Min
Max
Unit
V
(V)
CC
3.3 ± 0.3
2.5 ± 0.2
1.8 ± 0.15
3.3 ± 0.3
2.5 ± 0.2
1.8 ± 0.15
⎯
⎯
⎯
⎯
⎯
⎯
6
7
t
t
pZL
pZH
Output enable time
Figure 1, Figure 2
ns
11
6
t
t
pLZ
pHZ
Output disable time
Figure 1, Figure 2
ns
7
11
Capacitive Characteristics (Ta = 25°C)
Characteristic (Note)
Symbol
Test Condition
Typ.
Unit
V
(V)
CC
Control input capacitance
C
3.0
3.0
3.0
3
9
pF
pF
pF
IN
OE = V
Switch Off
CC
Switch terminal capacitance
C
I/O
OE = GND Switch On
19
Note:
This parameter is guaranteed by design.
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TC7MBL3245BFT/FK
R
ON
− V Characteristic Curves (Typ.) , Ta = 25°C
IN
40
35
30
25
20
Vcc = 3.0V
15
Vcc = 2.3V
10
5
0
0
0.5
1
1.5
VIS (V)
2
2.5
3
AC Test Circuit
Open
Switch
2 x Vcc
GND
Parameter
Switch
t
, t
pLH pHL
Open
Measure
Output
t
, t
2 × V
pLZ pZL
CC
t
, t
GND
C
R
= 50 pF
= 500 Ω
pHZ pZH
L
L
Figure 1
AC Waveforms
t 2.5 ns
r
t 2.5 ns
f
V
CC
90%
50%
Output Enable
( OE )
10%
GND
t
t
t
pLZ
pHZ
pZL
V
V
V
V
OH
OL
OH
OL
Output (A, B)
50%
50%
Low to Off to Low
10%
t
pZH
90%
Output (A, B)
High to Off to High
Outputs
enabled
Outputs
disabled
Outputs
enabled
Figure 2 t
, t
, t
, t
pLZ pHZ pZL pZH
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Rise and Fall Times (tr / tf) of the TC7MBL3245B I/O Signals
The tr(out) and tf(out) values of the output signals are affected by the CR time constant of the input, which consists of
the switch terminal capacitance (C ) and the on-resistance (R ) of the input.
I/O
ON
In practice, the tr(out) and tf(out) values are also affected by the circuit’s capacitance and resistance components other
than those of the TC7MBL3245B.
The tr / tf (out) values can be approximated as follows. (Figure 4 shows the test circuit.)
tr / tf out (approx) = - ( C + C ) ･ (R
R
) ･ ln ( ( ( V
– V ) – V ) / ( V
– V ) )
OH OL
I/O
L
DRIVE+ ON
OH
OL
M
where, R
is the output impedance of the previous-stage circuit.
DRIVE
Calculation example:
tr out (approx) = - ( 19+ 15 )E-12 ･ ( 120 + 4) ･ ln ( ( ( 3.0 - 0 ) – 1.5 ) / ( 3.0 – 0 ) )
≈ 3.0ns
Calculation conditions:
V
CC
= 3.0V , C = 15pF , R
= 120Ω(output impedance of the previous IC), V = 1.5V(VCC / 2)
DRIVE M
L
Output of the previous IC = digital (i.e., high-level voltage = V ; low-level voltage = GND)
CC
Previous IC
Waveform generated without the TC7MBL3245B
Measure
R
DRIVE
V
CC
GND
R
DRIVE
= output impedance of the previous IC
Previous IC
TC7MBL3245B
Waveform generated with the TC7MBL3245B added
C
I/O
(Switch On)
Measure
R
DRIVE
An/Bn
Bn/An
V
OH
V
V
M
M
V
OL
R
ON
tr out
tf out
R
DRIVE
= output impedance of the previous IC
V
CC
2.5 ± 0.2 V
/ 2
Parameter
3.3 ± 0.3 V
1.8 ± 0.15 V
/ 2
V
V
/ 2
V
V
CC
M
CC
CC
Figure 3 Test Circuit
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TC7MBL3245BFT/FK
Package Dimensions
Weight: 0.08 g (typ.)
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TC7MBL3245BFT/FK
Package Dimensions
Weight: 0.03 g (typ.)
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TC7MBL3245BFT/FK
RESTRICTIONS ON PRODUCT USE
20070701-EN
• 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.
• 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.
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