器件名称: MC74F648DW
功能描述: OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS
文件大小: 115.31KB 共6页
简 介:Product Preview OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS
These devices consist of bus transceiver circuits with 3-state D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes to a high logic level. Output Enable (OE) and DIR pins are provided to control the transceiver function. In the transceiver mode, data present at the high impedance port may be stored in either the A or the B register or in both. The select controls can multiplex stored and real-time (transparent mode) data. The direction control determines which bus will receive data when the enable OE is Active LOW. In the isolation mode (OE HIGH), A data may be stored in the B register and/or B data may be stored in the A register.
MC54/74F646 MC54/74F648
OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS
FAST SCHOTTKY TTL
Independent Registers for A and B Multiplexed Real-Time and Stored Data Choice of True (F646) and Inverting (F648) Data Paths 3-State Outputs PIN ASSIGNMENTS
VCC CPBA SBA OE 24 23 22 21 B0 20 B1 19 B2 18 B3 17 B4 16 B5 15 B6 14 B7 13
24 1
J SUFFIX CERAMIC CASE 758-01
F646
24 1
N SUFFIX PLASTIC CASE 724-03
1 2 3 CPAB SAB DIR
4 A0
5 A1 B0 20
6 A2 B1 19
7 A3 B2 18
8 A4 B3 17
9 A5 B4 16
10 A6 B5 15
11 12 A7 GND B6 14 B7 13
24 1
VCC CPBA SBA OE 24 23 22 21
DW SUFFIX SOIC CASE 751E-03
F648
ORDER……
