HI-1575PQT

更新时间： 2024-02-12 16:10:23

品牌	Logo	应用领域
HOLTIC		解码器编码器
页数	文件大小	规格书
12页	118K
描述
3.3V Dual Transceivers with Integrated Encoder / Decoders

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技术参数
数据手册

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HI-1575PQT 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	QFP
包装说明：	QFP-32	针数：	32
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.64
JESD-30 代码：	S-PQFP-G32	JESD-609代码：	e0
长度：	7 mm	湿度敏感等级：	3
功能数量：	1	端子数量：	32
最高工作温度：	125 °C	最低工作温度：	-55 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TQFP
封装形状：	SQUARE	封装形式：	FLATPACK, THIN PROFILE
峰值回流温度（摄氏度）：	240	认证状态：	Not Qualified
座面最大高度：	1.2 mm	标称供电电压：	3.3 V
表面贴装：	YES	技术：	CMOS
电信集成电路类型：	MIL-STD-1553 DATA BUS TRANSCEIVER	温度等级：	MILITARY
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	0.8 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	30	宽度：	7 mm

HI-1575PQT 数据手册

HI-1575

VDD

CLK

STRB

R/W

BUSA

Encoder

BUSB

CHA/CHB

13-20,

22-29

DATABUS

SYNC

Decoder A

RCVA

Decoder B

RCVB

ERROR

GND

FIGURE 1. HI-1575 BLOCK DIAGRAM

To transmit contiguous words, a second write to the TX RECEIVER

than 18.5 us after the first TX write. SAM bit 15 The HI-1575's two receivers continuously monitor both

(SENDDATA) is high during this period and may be used MIL-STD-1553 data busses. Bi-phase differential data

as a flag to indicate when the HI-1575 is ready to accept words are accepted from the MIL-STD-1553 bus through

the next data write for contiguous transmission. When the same direct or transformer coupled interface as the

transmitting a message of three or more words, the third transmitter. Each receiver’s differential input stage drives

and subsequent write operations should occur every 20.0 a filter and threshold comparator that presents data to the

us so as to avoid over-writing the previous data before it is decoders.

transferred to the transmitter's shift register.

The decoder logic checks the incoming word for correct

encoding, bit count and parity. If a valid MIL-STD-1553

word is received, the RCVA or RCVB output goes high

Figure 3 shows a timing diagram for transmit operations.

The transmitter outputs are either direct or transformer and the 16-bit received word is transferred to the RXA or

coupled to the MIL-STD-1553 data bus. Both coupling RXB register. The HI-1575 ERROR output goes high

methods produce a nominal voltage on the main whenever an encoding error is detected on either bus. If

MIL-STD-1553 bus of 7.5 volts peak-to-peak, line-to-line. a received word has an encoding error, then SAM bits 10

Figure 6 shows bus coupling examples.

or 14 (ERRORA, ERRORB) are set high, and the

corresponding RCVA or RCVB pin is not asserted.

One or both transmitters may be disabled by writing a '1'

into SAM register bits 0 or 1 (TXDISA, TXDISB). When dis- To minimize the number of pins necessary to interface the

abled, the host interface works as normal, but there is no HI-1575, the state of RCVA and RCVB can also be read

output from the BUSA and BUSA (BUSB and BUSB) pins.

from SAM bits 7 and 11.

HOLT INTEGRATED CIRCUITS

1 234 5 6 7...12

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