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74ALS645A 반도체 회로 부품 판매점

Octal transceiver 3-State



NXP Semiconductors 로고
NXP Semiconductors
74ALS645A 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
74ALS645A/74ALS645A–1
Octal transceiver (3–State)
Product specification
IC05 Data Handbook
1991 Jun 03
Philips
Semiconductors


74ALS645A 데이터시트, 핀배열, 회로
Philips Semiconductors
Octal transceiver (3-State)
Product specification
74ALS645A/74ALS645A-1
FEATURES
Octal bidirectional bus interface
3-State buffer outputs sink 24mA and source 15mA
Outputs are placed in high impedance state during power-off
conditions
The -1 version sinks 48mA IOL within the +5% VCC range
DESCRIPTION
The 74ALS645A is an octal transceiver featuring non-inverting
3-State bus compatible outputs in both transmit and receive
directions. The device features an output enable (OE) input for easy
cascading and transmit/receive (R/T) input for direction control.
The 74ALS645A-1 is the same as the 74ALS645A except that both
ports sink 48mA within the ±5% VCC range.
TYPE
74ALS645A
74ALS645A-1
TYPICAL
PROPAGATION
DELAY
7.0ns
7.0ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
34mA
34mA
PIN CONFIGURATION
T/R 1
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
GND 10
20 VCC
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
11 B7
SF00198
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
20-pin plastic DIP
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
74ALS645AN,
74ALS645A-1N
20-pin plastic SOL
74ALS645AD,
744ALS645A-1D
DRAWING
NUMBER
SOT146-1
SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
A0 – A7, B0 – B7
Data inputs
1.0/1.0
OE Output Enable input (active-Low)
1.0/1.0
T/R Transmit/receive input
1.0/1.0
A0 – A7
A port outputs
750/240
B0 – B7
B port outputs
750/240
A0 – A7
A port outputs (-1 version)
750/480
B0 – B7
B port outputs (-1 version)
750/480
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOAD VALUE
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
15mA/24mA
15mA/24mA
15mA/48mA
15mA/48mA
LOGIC SYMBOL
IEC/IEEE SYMBOL
234567 89
A0 A1 A2 A3 A4 A5 A6 A7
19 OE
1 T/R
B0 B1 B2 B3 B4 B5 B6 B7
VCC = Pin 20
GND = Pin 10
18 17 16 15 14 13 12 11
SF00199
19 G3
3EN1 [BA]
1 3EN2 [AB]
1
2
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
SC00097
1991 Jun 03
2 853–0597 02709




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74ALS645A transceiver

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74ALS645A

Octal transceiver 3-State - NXP Semiconductors



74ALS645A-1

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