MB2646

Features:

• Independent registers for A and B buses
• Multiple V_CC and GND pins minimize switching noise
• Live insertion/extraction permitted
• Power-up 3-State
• Power-up reset
• Multiplexed real-time and stored data
• Outputs sink 64mA and source 32mA
• Latch-up protection exceeds 500mA per Jedec JC40.2 Std 17
• ESD protection exceeds 2000V per MIL STD 883 Method 3015 and 200V per Machine Model


Pinout




Specifications

SYMBOL	PARAMETER	CONDITIONS	RATING	UNIT
VCC	DC supply voltage		0.5 to +7.0	V
IIK	DC input diode current	VI < 0	18	mA
VI	DC input voltage3		1.2 to +7.0	V
IOK	DC output diode current	VO < 0	50	mA
VOUT	DC output voltage3	output in Off or High state	0.5 to +5.5	V
IOUT	DC output current	output in Low state	128	mA
Tstg	Storage temperature range		65 to 150	°C

NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.


Description

The MB2646 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.

The MB2646 dual transceiver/register consists of two sets of bus transceiver circuits with 3-State outputs, 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 High.

Output Enable (nOE) and Direction (nDIR) pins of MB2646 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 B register or both.