SN74ABT16646DLR ,16-Bit Bus Transceivers And Registers With 3-State Outputs
SN74ABT16657DGGR ,16-Bit Transceivers With Parity Generators / Checkers And 3-State Outputs SN54ABT16657, SN74ABT16657 16-BIT TRANSCEIVERS WITH PARITY GENERATORS/CHECKERSAND 3-STATE OUTPUTSS ..
SN74ABT16657DL ,16-Bit Transceivers With Parity Generators / Checkers And 3-State Outputs SN54ABT16657, SN74ABT16657 16-BIT TRANSCEIVERS WITH PARITY GENERATORS/CHECKERSAND 3-STATE OUTPUTSS ..
SN74ABT16657DL ,16-Bit Transceivers With Parity Generators / Checkers And 3-State Outputs SN54ABT16657, SN74ABT16657 16-BIT TRANSCEIVERS WITH PARITY GENERATORS/CHECKERSAND 3-STATE OUTPUTSS ..
SN74ABT16657DLR ,16-Bit Transceivers With Parity Generators / Checkers And 3-State Outputs SN54ABT16657, SN74ABT16657 16-BIT TRANSCEIVERS WITH PARITY GENERATORS/CHECKERSAND 3-STATE OUTPUTSS ..
SN74ABT16821 ,20-Bit Bus Interface Flip-Flops With 3-State Outputslogic diagram (positive logic)11OE561CLKOne of TenChannelsC12551Q11D11DTo Nine Other Channels282OE2 ..
SN74LS122N ,RETRIGGERABLE MONOSTABLE MULTIVIBRATORStiming resistor that allows the circuits to be used with only an externalcapacitor. Once triggered, ..
SN74LS122NSR ,Retriggerable monostable multivibrator
SN74LS122NSR ,Retriggerable monostable multivibrator
SN74LS123 ,RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
SN74LS123D ,RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
SN74LS123DR2 ,RE Trigger Monostable MultivibratorSN74LS122, SN74LS123Retriggerable MonostableMultivibratorsThese dc triggered multivibrators feature ..
SN74ABT16646-SN74ABT16646DL-SN74ABT16646DLR
16-Bit Bus Transceivers And Registers With 3-State Outputs
JESD 17 Typical VOLP (Output Ground Bounce) < 1 V
at VCC = 5 V, TA = 25°C Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise Flow-Through Architecture Optimizes PCB
Layout High-Drive Outputs (–32-mA IOH, 64-mA IOL) Package Options Include Plastic Shrink
Small-Outline (DL), Thin Shrink
Small-Outline (DGG) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
descriptionThe ’ABT16646 devices consist of
bus-transceiver circuits, D-type flip-flops, and
control circuitry arranged for multiplexed
transmission of data directly from the input bus or
from the internal registers.
These devices can be used as two 8-bit
transceivers or one 16-bit transceiver. Data on the
A or B bus is clocked into the registers on the
low-to-high transition of the appropriate clock
(CLKAB or CLKBA) input. Figure 1 illustrates the
four fundamental bus-management functions that
can be performed with the ’ABT16646 devices.
Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions. In the
transceiver mode, data present at the high-impedance port may be stored in either register or in both. The
select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. The circuitry
used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition
between stored and real-time data. The direction control (DIR) determines which bus receives data when OE
is low. In the isolation mode (OE high), A data can be stored in one register and/or B data can be stored in the
other register.
When an output function is disabled, the input function is still enabled and can be used to store and transmit
data. Only one of the two buses, A or B, can be driven at a time.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1SAB
GND
1A1
1A2CC
1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
VCC
2A7
2A8
GND
2SAB
2CLKAB
2DIR
1SBA
GND
1B1
1B2CC
1B3
1B4
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
VCC
2B7
2B8
GND
2SBA
2CLKBA
2OE
