HC257 datasheet(1/14 Pages) STMICROELECTRONICS

tên linh kiện	HC257

Giải thích chi tiết về linh kiện	QUAD 2 CHANNEL MULTIPLEXER 3-STATE

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November 2004

s

HIGH SPEED: tPD = 3.7ns (TYP.) at VCC = 5V

s

LOW POWER DISSIPATION:

ICC = 4 µA (MAX.) at TA=25°C

s

HIGH NOISE IMMUNITY:

VNIH = VNIL = 28% VCC (MIN.)

s

POWER DOWN PROTECTION ON INPUTS

s

SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8mA (MIN)

s

BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s

OPERATING VOLTAGE RANGE:

VCC(OPR) = 2V to 5.5V

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 257

s

IMPROVED LATCH-UP IMMUNITY

s

LOW NOISE: VOLP = 0.8V (MAX.)

DESCRIPTION

The 74VHC257 is an advanced high-speed

CMOS

QUAD

2-CHANNEL

MULTIPLEXER

(3-STATE) fabricated with sub-micron silicon gate

and double-layer metal wiring C2MOS technology.

It is composed of four independent 2-channel

multiplexers with common SELECT and ENABLE

(OE) INPUT. The VHC257 is a non-inverting

multiplexer. When the ENABLE INPUT is held

"High", all outputs become in high impedance

state. If SELECT INPUT is held "Low", "A" data is

selected, when SELECT INPUT is "High", "B" data

is chosen.

Power down protection is provided on all inputs

and 0 to 7V can be accepted on inputs with no

regard to the supply voltage. This device can be

used to interface 5V to 3V.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74VHC257

QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE

T & R

SOP

74VHC257MTR

TSSOP

74VHC257TTR

TSSOP

SOP

Rev. 4

Số phần tương tự - HC257

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	HC257	52Kb / 7P	High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs
Toshiba Semiconductor	HC257	250Kb / 6P	QUAD 2-CHANEL MULTIPLEXER (3-STATE)
System Logic Semiconduc...	HC257	47Kb / 5P	Quad 2-Input Data Selector/Multiplexer with 3-State Outputs
Hitachi Semiconductor	HC257	52Kb / 9P	Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs)

More results

Mô tả tương tự - HC257

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	74AC257	287Kb / 11P	QUAD 2 CHANNEL MULTIPLEXER 3-STATE Apr-2001
	74VHCT257A	70Kb / 10P	QUAD 2 CHANNEL MULTIPLEXER 3-STATE Mar-2000
	M54HCT257	255Kb / 12P	HCT257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE HCT258 QUAD 2 CHANNEL MULTIPLEXER 3-STATE, INVERTING Feb-1993
Toshiba Semiconductor	TC74VHC257F	235Kb / 7P	QUAD 2-CHANNEL MULTIPLEXER (3-STATE)
STMicroelectronics	M74HC257	190Kb / 11P	QUAD 2 CHANNEL MULTIPLEXER (3-STATE) Aug-2001
Toshiba Semiconductor	TC74HC257AP	264Kb / 8P	Quad 2-Channel Multiplexer (3-state)
Toshiba Semiconductor	TC7MH257FK	189Kb / 7P	Quad 2-Channel Multiplexer (3-State)
STMicroelectronics	74ACT257	286Kb / 11P	QUAD 2 CHANNEL MULTIPLEXER (3-STATE) Apr-2001
STMicroelectronics	74VHCT257A	311Kb / 13P	QUAD 2 CHANNEL MULTIPLEXER (3-STATE) 16-Dec-2004
Toshiba Semiconductor	TC74VHC257F	224Kb / 9P	Quad 2-Channel Multiplexer (3-state)

More results

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