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PDF TC74ACT640P Data sheet ( Hoja de datos )
| Número de pieza | TC74ACT640P | |
| Descripción | OCTAL BUS TRANSCEIVER | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TC74ACT245,640P/F/FW/FT
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74ACT245P,TC74ACT245F,TC74ACT245FW,TC74ACT245FT
TC74ACT640P,TC74ACT640F,TC74ACT640FW,TC74ACT640FT
Octal Bus Transceiver
TC74ACT245P/F/FW/FT 3-State,
Non-Inverting
TC74ACT640P/F/FW/FT 3-State, Inverting
Note: xxxFW (JEDEC SOP) is not available in
Japan.
TC74ACT245P, TC74ACT640P
The TC74ACT245 and 640 are advanced high speed CMOS
OCTAL BUS TRANSCEIVERs fabricated with silicon gate and
double-layer metal wiring C2MOS technology.
They achieve the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
These devices may be used as a level converter for interfacing
TTL or NMOS to High Speed CMOS. The inputs are compatible with
TTL, NMOS and CMOS output voltage levels.
They are intended for two-way asynchronous communication
between data busses. The direction of data transmission is
determined by the level of the DIR input.
The enable input ( G ) can be used to disable the device so that
the busses are effectively isolated.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features (Note 1) (Note 2)
• High speed: tpd = 4.7 ns (typ.) at VCC = 5 V
• Low power dissipation: ICC = 8 μA (max) at Ta = 25°C
• Compatible with TTL outputs
: VIL = 0.8 V (max), VIH = 2.0 V (min)
• Symmetrical output impedance
: |IOH| = IOL = 24 mA (min)
Capability of driving 50 Ω transmission lines.
• Balanced propagation delays: tpLH ∼− tpHL
• Pin and function compatible with 74F245/640
Note 1: Do not apply a signal to any bus terminal when it is in
the output 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.
TC74ACT245F, TC74ACT640F
TC74ACT245FW, TC74ACT640FW
TC74ACT245FT, TC74ACT640FT
Weight
DIP20-P-300-2.54A
: 1.30 g (typ.)
SOP20-P-300-1.27A
: 0.22 g (typ.)
SOP20-P-300-1.27
: 0.22 g (typ.)
SOL20-P-300-1.27
: 0.46 g (typ.)
TSSOP20-P-0044-0.65A : 0.08 g (typ.)
1 2007-05-11
1 page  
TC74ACT245,640P/F/FW/FT
AC Characteristics (CL = 50 pF, RL = 500 Ω, input: tr = tf = 3 ns)
Characteristics
Propagation delay
time (Note 2)
Propagation delay
time (Note 3)
Output enable time
Output disable time
Input capacitance
Bus input capacitance
Power dissipation
capacitance
Symbol
Test Condition
VCC (V)
tpLH
tpHL
― 5.0 ± 0.5
tpLH
tpHL
― 5.0 ± 0.5
tpZL
tpZH
― 5.0 ± 0.5
tpLZ
tpHZ
― 5.0 ± 0.5
CIN DIR, G
CI/O
An, Bn
CPD
TC74ACT245
(Note 1) TC74ACT640
Ta = 25°C
Min Typ. Max
― 5.0 8.0
― 5.7 8.5
― 7.3 12.3
― 6.3 9.7
― 5 10
― 13 ―
― 38 ―
― 43 ―
Ta =
−40 to 85°C
Min Max
1.0 9.0
1.0 9.5
1.0 14.0
1.0 11.0
― 10
――
――
――
Unit
ns
ns
ns
ns
pF
pF
pF
Note 1: 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)
Note 2: For TC74ACT245 only
Note 3: For TC74ACT640 only
5 2007-05-11
5 Page 
TC74ACT245,640P/F/FW/FT
RESTRICTIONS ON PRODUCT USE
• The information contained herein is subject to change without notice.
20070701-EN
• 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.
11 2007-05-11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TC74ACT640P.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TC74ACT640F | OCTAL BUS TRANSCEIVER | Toshiba Semiconductor |
| TC74ACT640FT | OCTAL BUS TRANSCEIVER | Toshiba Semiconductor |
| TC74ACT640FW | OCTAL BUS TRANSCEIVER | Toshiba Semiconductor |
| TC74ACT640P | OCTAL BUS TRANSCEIVER | Toshiba Semiconductor |
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