CDx4AC245, CDx4ACT245 Octal-Bus Transceiver, Three-State, Non-Inverting
1 Features
- Buffered inputs
- Typical propagation delay
- 4ns at VCC = 5V, TA = 25°C, CL = 50pF
- SCR-latchup-resistant CMOS process and circuit design
- Speed of bipolar FAST™/AS/S with significantly reduced power consumption
- Balanced propagation delays
- AC types feature 1.5V to 5.5V operation and balanced noise immunity at 30% of the supply
- ± 24mA output drive current
- Fanout to 15 FAST™ ICs
- Drives 50Ω transmission line
2 Description
The 'AC245 and 'ACT245 are octal-bus transceivers that utilize Advanced CMOS Logic technology.
Device Information
| PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) | BODY SIZE(3) |
|---|---|---|---|
| CD74AC245/ CD74ACT245 | N (PDIP, 20) | 24.33mm × 9.4mm | 24.33mm × 6.35mm |
| DW (SOIC, 20) | 12.80mm × 10.3mm | 12.80mm × 7.50mm | |
| CD54AC245/ CD54ACT245 | J (CDIP, 20) | 24.2mm × 7.62mm | 24.2mm × 6.92mm |
| CD74ACT245 | DB (SSOP, 20) | 7.2mm × 7.8mm | 7.2mm × 5.3mm |
(1) For more information, see Section 11.
(2) The package size (length × width)
is a nominal value and includes pins, where applicable.
(3) The body size (length × width) is
a nominal value and does not include pins.
Logic Diagram (Positive
Logic)3 Pin Configuration and Functions
Figure 3-1 CD54AC245, CD54ACT245
(CERDIP), CD74AC245, CD74ACT245 (PDIP, SOIC, SSOP) Top ViewPin Functions
| PIN | TYPE1 | DESCRIPTION | |
|---|---|---|---|
| NO. | NAME | ||
| 1 | DIR | I/O | Direction Pin |
| 2 | A0 | I/O | A1 Input/Output |
| 3 | A1 | I/O | A2 Input/Output |
| 4 | A2 | I/O | A3 Input/Output |
| 5 | A3 | I/O | A4 Input/Output |
| 6 | A4 | I/O | A5 Input/Output |
| 7 | A5 | I/O | A6 Input/Output |
| 8 | A6 | I/O | A7 Input/Output |
| 9 | A7 | I/O | A8 Input/Output |
| 10 | GND | — | Ground Pin |
| 11 | B7 | I/O | B7 Input/Output |
| 12 | B6 | I/O | B6 Input/Output |
| 13 | B5 | I/O | B5 Input/Output |
| 14 | B4 | I/O | B4 Input/Output |
| 15 | B3 | I/O | B3 Input/Output |
| 16 | B2 | I/O | B2 Input/Output |
| 17 | B1 | I/O | B1 Input/Output |
| 18 | B0 | I/O | B0 Input/Output |
| 19 | OE | I/O | Output Enable |
| 20 | VCC | — | Power Pin |
(1) Signal Types: I = Input, O =
Output, I/O = Input or Output
