參數(shù)資料
型號: 74VHC161284MEAX
廠商: Fairchild Semiconductor
文件頁數(shù): 1/11頁
文件大?。?/td> 0K
描述: TXRX BIDIRECT IEEE 48SSOP
產(chǎn)品變化通告: Die Material/Mold Compound Change 10/Sept/2008
標(biāo)準(zhǔn)包裝: 1,000
系列: 74VHC
邏輯類型: IEEE STD 1284 轉(zhuǎn)換收發(fā)器
電源電壓: 4.5 V ~ 5.5 V
位數(shù): 8
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-BSSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 48-SSOP
包裝: 帶卷 (TR)
2005 Fairchild Semiconductor Corporation
DS500098
www.fairchildsemi.com
February 1998
Revised June 2005
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74VHC161284
IEEE 1284 Transceiver
General Description
The VHC161284 contains eight bidirectional data buffers
and eleven control/status buffers to implement a full
IEEE 1284 compliant interface. The device supports the
IEEE 1284 standard and is intended to be used in
Extended Capabilities Port mode (ECP). The pinout allows
for easy connection from the Peripheral (A-side) to the
Host (cable side).
Outputs on the cable side can be configured to be either
open drain or high drive (
r 14 mA). The pull-up and pull-
down series termination resistance of these outputs on the
cable side is optimized to drive an external cable. In addi-
tion, all inputs (except HLH) and outputs on the cable side
contain internal pull-up resistors connected to the VCC sup-
ply to provide proper termination and pull-ups for open
drain mode.
Outputs on the Peripheral side are standard LOW-drive
CMOS outputs. The DIR input controls data flow on the A1
A8/B1–B8 transceiver pins.
Features
s Supports IEEE 1284 Level 1 and Level 2 signaling
standards for bidirectional parallel communications
between personal computers and printing peripherals
s Replaces the function of two (2) 74ACT1284 devices
s All inputs have hysteresis to provide noise margin
s B and Y output resistance optimized to drive external
cable
s B and Y outputs in high impedance mode during power
down
s Inputs and outputs on cable side have internal pull-up
resistors
s Flow-through pin configuration allows easy interface
between the Peripheral and Host
Ordering Code:
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Ordering Number Package Number
Package Description
74VHC161284MEA
MS48A
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
74VHC161284MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
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74VHC161284MEA TXRX BIDIRECT IEEE 48SSOP
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