SN74CBT3244 Datasheet, PDF (1/4 Pages) Texas Instruments – OCTAL FET BUS SWITCH

SN74CBT3244
OCTAL FET BUS SWITCH
SCDS001H – NOVEMBER 1992 – REVISED MAY 1998
D Functionally Equivalent to QS3244
D Standard ’244-Type Pinout
D 5-Ω Switch Connection Between Two Ports
D TTL-Compatible Input Levels
D Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB, DBQ), Thin Very Small-Outline (DGV),
and Thin Shrink Small-Outline (PW)
Packages
description
The SN74CBT3244 provides eight bits of
high-speed TTL-compatible bus switching in a
standard ’244 device pinout. The low on-state
resistance of the switch allows connections to be
made with minimal propagation delay.
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
1OE 1
1A1 2
2B4 3
1A2 4
2B3 5
1A3 6
2B2 7
1A4 8
2B1 9
GND 10
20 ^V_CC
19 ^2OE
18 1B1
17 2A4
16 1B2
15 2A3
14 1B3
13 2A2
12 1B4
11 2A1
The device is organized as two 4-bit low-impedance switches with separate output-enable (OE) inputs. When
OE is low, the switch is on and data can flow from port A to port B, or vice versa. When OE is high, the switch
is open and a high-impedance state exists between the two ports.
The SN74CBT3244 is characterized for operation from 0°C to 70 °C.
FUNCTION TABLE
(each 4-bit bus switch)
INPUT
OE
FUNCTION
L
A port = B port
H
Disconnect
logic diagram (positive logic)
2
1A1
18
1B1
8
1A4
1
1OE
11
2A1
12
1B4
9
2B1
17
2A4
3
2B4
19
2OE
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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