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PDF TC74VHCT240AF Data sheet ( Hoja de datos )

Número de pieza TC74VHCT240AF
Descripción OCTAL BUS BUFFER
Fabricantes Toshiba 
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No Preview Available ! TC74VHCT240AF Hoja de datos, Descripción, Manual

TC74VHCT240,244AF/AFW/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHCT240AF,TC74VHCT240AFW,TC74VHCT240AFT,TC74VHCT240AFK
TC74VHCT244AF,TC74VHCT244AFW,TC74VHCT244AFT,TC74VHCT244AFK
Octal Bus Buffer
TC74VHCT240AF/AFW/AFT/AFK
Inverted, 3-State Outputs
TC74VHCT244AF/AFW/AFT/AFK
Non-Inverted, 3-State Outputs
Note: xxxFW (JEDEC SOP) is not available in
Japan.
TC74VHCT240AF, TC74VHCT244AF
The TC74VHCT240A and 244A are advanced high speed
CMOS OCTAL BUS BUFFFERs fabricated with silicon gate
C2MOS technology. They achieve the high speed operation
similar to equivalent Bipolar Schottky TTL while maintaining
the CMOS low power dissipation.
The TC74VHCT240A is an inverting 3-state buffer having two
active-low output enables. The TC74VHCT244A is a
non-inverting 3-state buffer, and has two active-low output
enables.
These devices are designed to be used with 3-state memory
address drivers, etc.
The input voltage are compatible with TTL output voltage.
These devices may be used as a level converter for interfacing
3.3 V to 5 V system.
Input protection and output circuit ensure that 0 to 5.5 V can
be applied to the input and output (Note) pins without regard to
the supply voltage. These structure prevents device destruction
due to mismatched supply and input/output voltages such as
battery back up, hot board insertion, etc.
Note: Output in off-state
Features
High speed: tpd = 6.1 ns (typ.) at VCC = 5 V
Low power dissipation: ICC = 4 µA (max) at Ta = 25°C
Compatible with TTL outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
Power down protection is provided on all inputs and outputs
Balanced propagation delays: tpLH ∼− tpHL
Low noise: VOLP = 1.0 V (max)
Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 240/244 type.
TC74VHCT240AFW, TC74VHCT244AFW
TC74VHCT240AFT, TC74VHCT244AFT
TC74VHCT240AFK, TC74VHCT244AFK
Weight
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.)
VSSOP20-P-0030-0.50 : 0.03 g (typ.)
1
2006-06-01

1 page




TC74VHCT240AF pdf
TC74VHCT240,244AF/AFW/AFT/AFK
AC Characteristics (input: tr = tf = 3 ns)
Characteristics
Propagation delay
time
(TC74VHCT240A)
Propagation delay
time
(TC74VHCT244A)
3-state output enable
time
3-state output disable
time
Output to output skew
Input capacitance
Output capacitance
Power dissipation
capacitance (Note 2)
Symbol
tpLH
tpHL
tpLH
tpHL
tpZL
tpZH
tpLZ
tpHZ
tosLH
tosHL
CIN
COUT
CPD
Test Condition
Ta = 25°C
VCC (V) CL (pF) Min Typ. Max
15 5.6 7.8
5.0 ± 0.5
50 6.1 8.8
RL = 1 k
5.0 ± 0.5
5.0 ± 0.5
15
50
15
50
5.4 7.4
5.9 8.4
7.7 10.4
8.2 11.4
RL = 1 k
5.0 ± 0.5 50
8.8 11.4
(Note 1) 5.0 ± 0.5 50
TC74VHCT240A
TC74VHCT244A
⎯ ⎯ 1.0
4 10
9
19
18
Ta =
40 to 85°C
Min Max
1.0 9.0
1.0 10.0
1.0 8.5
1.0 9.5
1.0 12.0
1.0 13.0
1.0 13.0
1.0
10
⎯⎯
⎯⎯
⎯⎯
Unit
ns
ns
ns
ns
ns
pF
pF
pF
Note 1: Parameter guaranteed by design.
tosLH = |tpLHm tpLHn|, tosHL = |tpHLm tpHLn|
Note 2: 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)
Noise Characteristics (input: tr = tf = 3 ns) (Note)
Characteristics
Symbol
Test Condition
Quiet output maximum dynamic VOL
Quiet output minimum dynamic VOL
Minimum high level dynamic input
voltage
Maximum low level dynamic input
voltage
VOLP
CL = 50 pF
VOLV
CL = 50 pF
VIHD
VILD
CL = 50 pF
CL = 50 pF
VCC (V)
5.0
5.0
Ta = 25°C
Typ. Limit
0.8 1.0
(0.9) (1.1)
0.8 1.0
(0.9) (1.1)
Unit
V
V
5.0
2.0
V
5.0
0.8
V
Note: The value in ( ) only applies to JEDEC SOP (FW) devices.
5 2006-06-01

5 Page





TC74VHCT240AF arduino
TC74VHCT240,244AF/AFW/AFT/AFK
Note: Lead (Pb)-Free Packages
SOP20-P-300-1.27A TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50
RESTRICTIONS ON PRODUCT USE
The information contained herein is subject to change without notice. 021023_D
060116EBA
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. 021023_A
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. 021023_B
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. 060106_Q
The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent rights of
TOSHIBA or others. 021023_C
The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_E
11 2006-06-01

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