CMOS Logic ICs feature power-up/power-down HZ function.November 14, 2011 -
Available in 3-state inverted and non-inverted buffer versions, TC74LCXZ Series and TC74LCXZA Series maintain output at high impedance when power supply voltages are in range of 0-1.5 V and 0-1.2 V, respectively. Hot-swap ICs manage inrush current during live insertion of cards to prevent system failures. TC74LCXZ Series consumes +40 µA max at V(CC) = 2.7-3.6 V (V(IN) = V(CC) or GND), while TC74LCXZA Series consumes +40 µA max at V(CC) = 2.3-2.7 V (V(IN) = V(CC) or GND).
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Toshiba America Electronic Components (TAEC)
9775 Toledo Way
Irvine, CA, 92618-1811
USA
Toshiba Adds Hot-Swap General-Purpose Series to Family of Low-Voltage CMOS Logic ICs
Series Includes Industry's First Hot-Swap 2.5V CMOS Logic IC
IRVINE, Calif., -- Toshiba America Electronic Components, Inc., (TAEC)*, a committed leader that collaborates with technology companies to create breakthrough designs, has announced the addition of the TC74LCXZ and TC74LCXZA to its family of low-voltage CMOS logic ICs. The new ICs from Toshiba feature a built-in power-up/power-down HZ (high-impedance) function and can maintain output at high impedance when power supply voltages are in the range of 0 to 1.5V (TC74LCXZ Series) and 0 to 1.2V (TC74LCXZA Series). This function enables hot-swap applications when the main system is turned on. Both the 74LCXZ and 74LCXZA come in 3-State inverted and non-inverted buffer.
Hot-swap ICs manage inrush current during live insertion of cards in order to prevent system failures. Hot-swap applications include factory automation and network equipment.
The TC74LCXZ and TC74LCXZA Series can be used for 3.3V and 2.5V systems respectively, and the TC74LCXZA Series, in particular, is one of the industry's first hot-swap 2.5V CMOS logic ICs. In addition, this new series of ICs can achieve a reduction in consumption current for BiCMOS logic ICs.
Features of the TC74LCXZ and TC74LCXZA include:
-- Hot-swap support: This function enables hot-swap applications when the main system is turned on.
-- Lineup of the industry's first hot-swap 2.5V CMOS logic ICs: The TC74LCXZA Series is a 2.5V CMOS logic IC. This series is suitable as a replacement of 2.5V BiCMOS logic ICs.
-- Achieves a reduction in consumption current. The TC74LCXZ Series: +40 microamperes (max.) at V(CC) = 2.7V to 3.6V (V(IN) = V(CC) or GND). The TC74LCXZA Series: +40 microamperes (max.) at V(CC) = 2.3V to 2.7V (V(IN) = V(CC) or GND).
-- Interface between different power supplies can be realized with the tolerant function in both the input and output sections.
-- TSSOP20 and US20 packages are available in this lineup. Footprint can be reduced by 50 percent with the US20 package compared to the TSSOP20 package.
-- All inputs are equipped with protection circuits against static discharge.
Operating Operating
Supply Supply Output
Voltage Voltage Current
(V(CC), (V(CC), (max)
Part Number max) min) (mA)
Propagation
delay time
Number of Number of (tpd/tpz)
Function Package Pins Circuits max
-------- ------- ---------- ---------- ------------
Octal
Bus
Buffer
(3-State, 6.5 ns at
TC74LCXZ240FK Inverted) US20 20 8 3.6 V 2.7 V 36 at 3V 3.3+-0.3V
6.5 ns at
TC74LCXZ240FT TSSOP20 3.6 V 2.7 V 36 at 3V 3.3+-0.3V
Octal
Bus
Buffer 5.9 ns at
TC74LCXZ244FK (3-State) US20 3.6 V 2.7 V 36 at 3V 3.3+-0.3V
5.9 ns at
TC74LCXZ244FT TSSOP20 3.6 V 2.7 V 36 at 3V 3.3+-0.3V
Octal
Bus
Buffer
(3-State, 18 at 7.5 ns at
TC74LCXZA240FK Inverted) US20 2.7 V 2.3 V 2.3V 2.5+-0.2V
18 at 7.5 ns at
TC74LCXZA240FT TSSOP20 2.7 V 2.3 V 2.3V 2.5+-0.2V
Octal
Bus
Buffer 18 at 7 ns at
TC74LCXZA244FK (3-State) US20 2.7 V 2.3 V 2.3V 2.5+-0.2V
-------------- ---- ----- ----- ------ ----------
18 at 7 ns at
TC74LCXZA244FT TSSOP20 2.7 V 2.3 V 2.3V 2.5+-0.2V
The Toshiba TC74LCXZ and TC74LCXZA are available now.
Toshiba's Discrete Products
Toshiba is a leading supplier in a number of discrete product categories, including power transistors, rectifiers and thyristors, LMOS logic, CMOS logic, photocouplers, Toslinks(TM), LEDs, small signal diodes and transistors. The company's discrete devices are designed to meet the growing demand for high-performance and lower voltages in today's wireless telecommunications and consumer electronics applications, while emphasizing its strength in the automotive and industrial markets.
*About Toshiba Corp. and TAEC
Through proven commitment, lasting relationships and advanced, reliable electronic components, Toshiba enables its customers to create market-leading designs. Toshiba is the heartbeat within product breakthroughs from OEMs, ODMs, CMs, VARs, distributors and fabless chip companies worldwide. A committed electronic components leader, Toshiba designs and manufactures high-quality flash memory-based storage solutions, solid state drives (SSDs), hard disk drives (HDDs), discrete devices, LCD displays, advanced materials, medical tubes, custom SoCs/ASICs, imaging products, microcontrollers and wireless components that make possible today's leading cell phones, MP3 players, cameras, medical devices, automotive electronics, enterprise solutions and more.
Toshiba America Electronic Components, Inc. is an independent operating company owned by Toshiba America, Inc., a subsidiary of Toshiba Corporation, Japan's largest semiconductor manufacturer and the world's third largest semiconductor manufacturer (Gartner, 2010 WW Semiconductor Revenue, April 2011). Toshiba was founded in 1875 and today has over 490 subsidiaries and affiliates, with 203,000 employees worldwide and annual sales of $77 billion. Visit Toshiba's web site at www.toshiba.co.jp/index.htm.
© 2011 Toshiba America Electronic Components, Inc. All rights reserved.
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