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TC7MB3257FK
Preliminary TOSHIBA CMOS Digital Integrated Circuit
Quad 1-of-2 Multiplexer/Demultiplexer
Silicon Monolithic
TC7MB3257FK
The TC7MB3257FK is high-speed CMOS quad 1-2 multiplexer/demultiplexer. The low on resistance of the switch allows connections to be made with minimal propagation delay time. This device consists of four individual two-inputs multiplexer/demultiplexer with common select input (S) and output enable ( OE ). The A inputs is connected to the B1 or B2 outputs determined by the combination both the select input (S) and output enable ( OE ). When the output enable ( OE ) input is held "H" level, the switches are open with regardless the state of Weight: 0.02 g (typ.) select inputs and a high-impedance state exists between the switches. All inputs are equipped with protection circuits against static discharge.
Features
* * * * * * * Operating voltage: VCC = 4.5~5.5 V High speed: tpd = 0.25 ns (max) Low on resistance: RON = 5 (typ.) ESD performance: Machine model > 200 V Human body model > 2000 V Compatible with TTL outputs (control inputs) Package: VSSOP (US16) Pin compatible with the 74xx257 type. Functionally equivalent to (FST/CBT) 3257.
Pin Assignment (top view)
S 1B1 1B2 1A 2B1 2B2 2A GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC
OE
4B1 4B2 4A 3B1 3B2 3A
000630EBA1
* 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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Truth Table
Inputs
OE
Function S L H X A port = B1 port A port = B2 port Disconnect
L L H
System Diagram
4 2
1A
1B1
3
1B2
2A
7
5
2B1
6
2B2
3A
9
11
3B1
10
3B2
4A
12
14
4B1
13
4B2
S
1
15
OE
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Maximum Ratings
Characteristics Power supply range DC input voltage DC switch voltage Input diode current Continuous channel current Power dissipation DC VCC/GND current Storage temperature Symbol VCC VIN VS IIK IS PD ICC/IGND Tstg Rating -0.5~7.0 -0.5~7.0 -0.5~7.0 -50 128 180 100 -65~150 Unit V V V mA mA mW mA C
Recommended Operating Conditions
Characteristics Supply voltage Input voltage Switch voltage Operating temperature Input rise and fall time Symbol VCC VIN VS Topr dt/dv Rating 4.5~5.5 0~5.5 0~5.5 -40~85 0~10 Unit V V V C ns/V
Electrical Characteristics DC Characteristics (Ta = -40~85C)
Characteristics "H" level "L" level Input leakage current ( OE , S) Off-state leakage current (switch off) ON resistance (Note2) Symbol VIH VIL IIN ISZ VIN = 0~5.5 V A, B = 0~5.5 V, OE = VCC VIS = 0 V IIS = 64 mA IIS = 30 mA Test Condition VCC (V) Input voltage 4.5~5.5 4.5~5.5 5.5 5.5 4.5 4.5 4.5 5.5 5.5 2.0 Min Typ. (Note1) 5 5 10 Max 0.8 1.0 1.0 7 7 15 10 2.5 A mA A A Unit
V
RON
VIS = 2.4 V, IIS = 15 mA ICC ICC VIN = VCC or GND, IOUT = 0 VIN = 3.4 V (one input)
Increase in ICC per input
Note1: Typical values are at VCC = 5 V, Ta = 25C. Note2: Measured by the voltage drop between A and B pins at the indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (A or B) pins.
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AC Characteristics (Ta = -40~85C)
Characteristics Propagation delay time (bus to bus) Propagation delay time (S to bus) Output enable time ( OE to bus) Output enable time (S to bus) Output disable time ( OE to bus) Output disable time (S to bus) Symbol tpLH tpHL tpLH tpHL tpZL tpZH tpZL tpZH tpLZ tpHZ tpLZ tpHZ Figure 1, Figure 3 4.5 Figure 1, Figure 3 4.5 Figure 1, Figure 3 4.5 Figure 1, Figure 3 4.5 Figure 1, Figure 2 4.5 Test Condition VCC (V) Figure 1, Figure 2 (Note3) 4.5 0.25 ns Min Max Unit
TBD
ns
TBD
ns
TBD
ns
TBD
ns
TBD
ns
Note3: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical on resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage the source (zero output impedance).
Capacitive Characteristics (Ta = 25C)
Characteristics Control pin input capacitance ( OE , S) Switch terminal capacitance (B1~2) Switch terminal capacitance (A) Symbol CIN CI/O CI/O
OE = VCC OE = VCC
Test Condition VCC (V) (Note4) (Note4) (Note4) 5.0 5.0 5.0
Typ. 3 10 17
Unit pF pF pF
Note4: This parameter is guaranteed by design.
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AC Test Circuit
Open 7.0 V GND Measure CL = 50 pF RL = 500 CL RL
Switch RL
Parameter tpLH, tpHL tpLZ, tpZL tpHZ, tpZH
Switch Open 7.0 V Open
Output
Figure 1 AC Waveform
tr Input 2.5 ns tf 90% 1.5 V 10% 2.5 ns 3.0 V
GND
VOH Output tpLH, tpHL 1.5 V tpHL, tPLH VOL
Figure 2
tpLH, tpHL
tr Output Enable ( OE )
2.5 ns
tf 90% 1.5 V
2.5 ns 3.0 V 10%
GND
tpLZ Output (A, B) Low to Off to Low tpHZ Output (A, B) High to Off to High Outputs enabled
tpZL 3.5 V 1.5 V VOL + 0.3 V VOH - 0.3 V 1.5 V GND Outputs disabled Outputs enabled tpZH VOL VOH
Figure 3
tpLZ, tpHZ, tpZL, tpZH
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Package Dimensions
Weight: 0.02 g (typ.)
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