INS8208
INS8208 is 8-Bit Bidirectional Transceiver manufactured by National Semiconductor.
Description
Features
APRIL 1978
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The INS8208 is an 8-bit TRI-STATE® low power Schottky transceiver. It provides bidirectional drive for bus-oriented microprocessor and digital munications systems. Straight through bidirectional transceivers are featured, with low power Schottky drive capability on the A ports and 48m A bus drive capability on the B ports. PNP inputs are incorporated to reduce input loading.
One input, Transmit/Receive, determines the direction of logic signals through the bidirectional transceiver: Transmit enables data from A ports to B ports; Receive enables data from B ports to A ports. The Chip Disable input disables both A and B ports by placing them in a TRI-STATE® condition.
The output high voltage (VOH) is specified at 3.6 V minimum to allow interfacing microprocessors, .TTL, MOS, CMOS, RAM, or ROM.
- B-Bit Bidirectional Data Flow Reduces System Package Count
- Bidirectional TR I-STATE® Inputs/Outputs Interface with Bus-Oriented Systems
- PNP inputs Reduce Input Loading
- 3.6V Output High Voltage Interfaces with TTL, MOS, and CMOS
- 48m A/300p F Bus Drive Capability
- Pinouts Simplify System Interconnections
- Transmit/Receive and Chip Disable Simplify Control Logic
- pact 20-Pin Dual-In-Line Package
- Low ICC Power (Bm A per bidirectional bit)
- MICROBUS TM
- patible
INS8208 MICROBUS™ Configuration
CPU GROUP r-
ADDRESS BUS
DATA BUS
CONTROL BUS
07- 00
Bl- BO
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