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SN54CBT16244, SN74CBT16244

16-BIT FET BUS SWITCHES

SCDS031I – MAY 1996 – REVISED OCTOBER 2000

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Members of Texas Instruments’ Widebus

Family

Standard ’16244-Type Pinout

5-Ω Switch Connection Between Two Ports

TTL-Compatible Input Levels

description

The ’CBT16244 devices provide 16 bits of

high-speed TTL-compatible bus switching in a

standard ’16244 device pinout. The low on-state

resistance of the switch allows connections to be

made with minimal propagation delay.

These devices are organized as four 4-bit

low-impedance switches with separate

output-enable (OE) inputs. When OE is low, the

switch is on, and data can ow from port A to port

B, or vice versa. When OE is high, the switch is

open, and the high-impedance state exists

between the two ports.

ORDERING INFORMATION

TAPACKAGE†ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SSOP DL

Tube SN74CBT16244DL

CBT16244

C to 85

SSOP

–

Tape and reel SN74CBT16244DLR

CBT16244

–

40 C°

85 C°

TSSOP – DGG Tape and reel SN74CBT16244DGGR CBT16244

TVSOP – DGV Tape and reel SN74CBT16244DGVR CY244

–55°C to 125°C CFP – WD Tube SNJ54CBT16244WD SNJ54CBT16244WD

†Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

FUNCTION TABLE

(each 4-bit bus switch)

INPUT

OUTPUTS

A, B

L A port = B port

H Disconnect

PRODUCTION DATA information is current as of publication date.

Products conform to specications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

1OE

1B1

1B2

GND

1B3

1B4

VCC

2B1

2B2

GND

2B3

2B4

3B1

3B2

GND

3B3

3B4

VCC

4B1

4B2

GND

4B3

4B4

4OE

2OE

1A1

1A2

GND

1A3

1A4

VCC

2A1

2A2

GND

2A3

2A4

3A1

3A2

GND

3A3

3A4

VCC

4A1

4A2

GND

4A3

4A4

3OE

SN54CBT16244 . . . WD PACKAGE

SN74CBT16244 . . . DGG, DGV, OR DL PACKAGE

(TOP VIEW)

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

Widebus is a trademark of Texas Instruments.

SN54CBT16244, SN74CBT16244

16-BIT FET BUS SWITCHES

SCDS031I – MAY 1996 – REVISED OCTOBER 2000

2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic diagram (positive logic)

3A1

3A4

1OE

1B1

1B4

2A4

2OE

2B1

2B4

2A1

3B1

3B4

1A1

1A4

3OE

4A4

4OE

4A1 4B1

4B4

absolute maximum ratings over operating free-air temperature range (unless otherwise noted) †

Supply voltage range, VCC –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI (see Note 1) –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous channel current 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input clamp current, IIK (VI/O < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance, θJA (see Note 2): DGG package 70°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DGV package 58°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DL package 63°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†Stresses beyond those listed under “absolute maximum ratings” 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.

NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions (see Note 3)

SN54CBT16244 SN74CBT16244

UNIT

MIN MAX MIN MAX

UNIT

VCC Supply voltage 4 5.5 4 5.5 V

VIH High-level control input voltage 2 2 V

VIL Low-level control input voltage 0.8 0.8 V

TA Operating free-air temperature –55 125 –40 85 °C

NOTE 3: All unused control inputs of the device must be held at V

or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs

, literature number SCBA004.

SN54CBT16244, SN74CBT16244

16-BIT FET BUS SWITCHES

SCDS031I – MAY 1996 – REVISED OCTOBER 2000

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54CBT16244 SN74CBT16244

UNIT

PARAMETER

TEST

CONDITIONS

MIN TYP

† MAX MIN TYP†MAX

UNIT

VIK VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

VCC = 0 VI = 5.5 V 10 10

IVCC = 5.5 V VI = 5.5 V or GND ± ±1 1

ICC VCC = 5.5 V,

VI = VCC or GND

= 0, 3.2 3 Aµ

∆ICC‡Control

inputs

VCC = 5.5 V,

Other inputs at VCC or GND

One input at 3.4 V, 2.5 2.5 mA

CiControl

inputs VI = 3 V or 0 2.5 2.5 pF

Cio(OFF) VO = 3 V or 0, OE = VCC 4.5 4.5 pF

VCC = 4 V, VI = 2.4 V, II = 15 mA 20 20

r§

VI = 0, II = 64 mA 5 10 5 7

Ω

VCC = 4.5 V VI = 0, II = 30 mA 5 10 5 7

Ω

VI = 2.4 V, II = 15 mA 8 14 8 12

†All typical values are at V

CC = 5 V, TA = 25°C.

‡This is the increase in supply current for each input that is at the specied TTL voltage level rather than V

CC or GND.

§Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by

the lower of the voltages of the two (A or B) terminals.

switching characteristics over recommended operating free-air temperature range, C L = 50 pF

(unless otherwise noted) (see Figure 1)

SN54CBT16244 SN74CBT16244

PARAMETER FROM

(INPUT)

(OUTPUT) VCC = 4 V V

CC = 5 V

±0.5 V VCC = 4 V VCC = 5 V

± 0.5 V UNIT

MIN MAX MIN MAX MIN MAX MIN MAX

tpd¶ A or B B or A 0.8* 0.35 0.25 ns

ten OE A or B 10.3 1 9.2 5.5 1 5.1 ns

tdis OE A or B 9.7 1 8.2 5.2 1 5.4 ns

* On products compliant to MIL-PRF-38535, this parameter is not production tested.

¶The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specied load capacitance, when

driven by an ideal voltage source (zero output impedance).

Produktspezifikationen

Marke:	Texas Instruments
Kategorie:	Nicht kategorisiert
Modell:	SN74CBT16244DL
Breite:	16 mm
Tiefe:	7.59 mm
Höhe:	2.59 mm
Betriebstemperatur:	-40 - 85 °C
Verpackungsbreite:	14.24 mm
Verpackungstiefe:	473.7 mm
Verpackungshöhe:	5.11 mm
Typ:	Logik-IC
Menge pro Packung:	25 Stück(e)
Verpackungsart:	SSOP
Temperaturbereich bei Lagerung:	-65 - 150 °C
Anzahl Pins:	48
Breite (mit Pins):	16 mm
Tiefe (mit Pins):	10.67 mm
Höhe (mit Pins):	2.79 mm