74HCT646D NXP Semiconductors, 74HCT646D Datasheet - Page 3

• Manufacturer Part Number: 74HCT646D
• Description: Bus Transceivers OCTAL TRANSCEIVER/ REGISTER 3-S
• Manufacturer: NXP Semiconductors

Specifications of 74HCT646D

• Logic Type: CMOS
• Logic Family: HCT
• Number Of Channels Per Chip: 8
• Input Level: TTL
• Output Level: CMOS
• Output Type: 3-State
• High Level Output Current: - 6 mA
• Low Level Output Current: 6 mA
• Propagation Delay Time: 44 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 125 C
• Package / Case: SO-24
• Function: Bus Transceiver / Register
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Circuits: 1
• Polarity: Non-Inverting
• Lead Free Status / Rohs Status: Details
• Other names: 74HCT646D,652

Philips Semiconductors
PIN DESCRIPTION
September 1993
PIN NO.
1
2
3
4, 5, 6, 7, 8, 9, 10, 11
12
20, 19, 18, 17, 16, 15, 14, 13
21
22
23
24
Octal bus transceiver/register; 3-state
Fig.1 Pin configuration.
SYMBOL
CP
S
DIR
A
GND
B
OE
S
CP
V
AB
0
0
BA
CC
AB
to A
to B
BA
7
7
Fig.2 Logic symbol.
NAME AND FUNCTION
A to B clock input (LOW-to-HIGH, edge-triggered)
select A to B source input
direction control input
A data inputs/outputs
ground (0 V)
B data inputs/outputs
output enable input (active LOW)
select B to A source input
B to A clock input (LOW-to-HIGH, edge-triggered)
positive supply voltage
3
Fig.3 IEC logic symbol.
74HC/HCT646
Product specification