參數(shù)資料
型號(hào)： VMEH22501A
廠商： Texas Instruments, Inc.
英文描述： 8-BIT UNIVERSAL BUS TRANSCEIVER AND TWO 1-BIT BUS TRANSCEIVERS WITH SPLIT LVTTL PORT, FEEDBACK PATH, AND 3-STATE OUTPUTS
中文描述： 8位通用總線收發(fā)器和兩個(gè)1位總線收發(fā)器與劈開(kāi)LVTTL港口，反饋路徑，以及三態(tài)輸出
文件頁(yè)數(shù)： 3/30頁(yè)
文件大?。?/td> 568K
代理商： VMEH22501A
SCES620 – DECEMBER 2004
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
functional description
The SN74VMEH22501A is a high-drive (–48/64 mA), 8-bit UBT transceiver containing D-type latches and
D-type flip-flops for data-path operation in transparent, latched, or flip-flop modes. Data transmission is true
logic. The device is uniquely partitioned as 8-bit UBT transceivers with two integrated 1-bit three-wire bus
transceivers.
functional description for two 1-bit bus transceivers
The OEAB inputs control the activity of the 1B or 2B port. When OEAB is high, the B-port outputs are active.
When OEAB is low, the B-port outputs are disabled.
Separate 1A and 2A inputs and 1Y and 2Y outputs provide a feedback path for control and diagnostics
monitoring. The OEBY inputs control the 1Y or 2Y outputs. When OEBY is low, the Y outputs are active. When
OEBY is high, the Y outputs are disabled.
The OEBY and OEAB inputs can be tied together to form a simple direction control where an input high yields
A data to B bus and an input low yields B data to Y bus.
1-BIT BUS TRANSCEIVER FUNCTION TABLE
INPUTS
OUTPUT
MODE
OEAB
OEBY
L
H
Z
Isolation
H
H
A data to B bus
True driver
L
L
B data to Y bus
H
L
A data to B bus, B data to Y bus
True driver with feedback path
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