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参数资料
| 型号： | SN74BCT29854DW |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | BCT/FBT SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDSO24 |
| 封装： | GREEN, PLASTIC, SOIC-24 |
| 文件页数： | 1/12页 |
| 文件大小： | 416K |
| 代理商： | SN74BCT29854DW |
DW OR NT PACKAGE
(TOP VIEW)
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OEA
A1
A2
A3
A4
A5
A6
A7
A8
ERR
CLR
GND
VCC
B1
B2
B3
B4
B5
B6
B7
B8
PARITY
OEB
LE
SN74BCT29854
8BIT TO 9BIT PARITY BUS TRANSCEIVER
SCBS257 SEPTEMBER 1987 REVISED NOVEMBER 1993
Copyright
1993, Texas Instruments Incorporated
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
BiCMOS Process With TTL Inputs and
Outputs
State-of-the-Art BiCMOS Design
Significantly Reduces Standby Current
Flow-Through Pinout (All Inputs on
Opposite Side From Outputs)
Functionally Equivalent to AMD Am29854
High-Speed Bus Transceiver With Parity
Generator / Checker
Parity-Error Flag With Open-Collector
Output
Latch for Storage of the Parity-Error Flag
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (NT)
description
The SN74BCT29854 is an 8-bit to 9-bit parity transceiver designed for asynchronous communication between
data buses. When data is transmitted from the A to B bus, a parity bit is generated. When data is transmitted
from the B to A bus with its corresponding parity bit, the parity-error (ERR) output will indicate whether or not
an error in the B data has occurred. The output-enable (OEA, OEB) inputs can be used to disable the device
so that the buses are effectively isolated.
A 9-bit parity generator/ checker generates a parity-odd (PARITY) output and monitors the parity of the I/O ports
with an open-collector parity-error (ERR) flag. ERR can be either passed, sampled, stored, or cleared from the
latch using the latch-enable (LE) and clear (CLR) control inputs. When both OEA and OEB are low, data is
transferred from the A bus to the B bus and inverted parity is generated. Inverted parity is a forced error condition
which gives the designer more system diagnostic capability. The SN74BCT29854 provides inverting logic.
The SN74BCT29854 is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUT AND I/O
OEB
OEA
CLR
LE
Ai
∑ of H’s
Bi
∑ of L’s
A
B
PARITY
ERR
FUNCTION
L
H
X
Odd
Even
NA
A
H
L
NA
A data to B bus and generate parity
H
L
X
L
NA
Odd
Even
B
NA
H
L
B data to A bus and check parity
H
L
H
NA
X
NA
N1
Store error flag
X
L
H
X
NA
H
Clear error-flag register
H
L
X
H
L
X
L Odd
H Even
X
Z
NC
H
L
H
Isolation§
L
X
Odd
Even
NA
A
L
H
NA
A data to B bus and generate inverted
parity
NA = not applicable, NC = no change, X = don’t care
Summation of low-level inputs includes PARITY along with Bi inputs.
Output states shown assume the ERR output was previously high.
§ In this mode, the ERR output, when enabled, shows noninverted parity of the A bus.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74BCT29854DWE4 | 功能描述:总线收发器 8-Bit To 9-Bit Parity Transceivers RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT29854DWG4 | 功能描述:总线收发器 8B To 9B Parity Transceivers RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT29854DWR | 功能描述:总线收发器 8-Bit To 9-Bit Parity Transceivers RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT29854DWRE4 | 功能描述:总线收发器 16-Bit 22-KSPS DSP Codec RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT29854DWRG4 | 功能描述:总线收发器 8B To 9B Parity Transceivers RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
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