SN74CB3Q3244_15 Datasheet, PDF (1/21 Pages) Texas Instruments – 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH

SN74CB3Q3244
8ĆBIT FET BUS SWITCH
2.5ĆV/3.3ĆV LOWĆVOLTAGE HIGHĆBANDWIDTH BUS SWITCH
SCDS154B − OCTOBER 2003 − REVISED DECEMBER 2004
D High-Bandwidth Data Path
(Up To 500 MHz^†)
D 5-V-Tolerant I/Os with Device Powered Up
or Powered Down
D Low and Flat ON-State Resistance (r_on)
Characteristics Over Operating Range
(r_on = 4 Ω Typical)
D Rail-to-Rail Switching on Data I/O Ports
− 0- to 5-V Switching With 3.3-V V_CC
− 0- to 3.3-V Switching With 2.5-V V_CC
D Bidirectional Data Flow, With Near-Zero
Propagation Delay
D Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 3.5 pF Typical)
D Fast Switching Frequency
(f_OE = 20 MHz Max)
† _{For additional information regarding the performance}
characteristics of the CB3Q family, refer to the TI
application report, CBT-C, CB3T, and CB3Q
Signal-Switch Families, literature number SCDA008.
D Data and Control Inputs Provide
Undershoot Clamp Diodes
D Low Power Consumption
(I_CC = 0.7 mA Typical)
D V_CC Operating Range From 2.3 V to 3.6 V
D Data I/Os Support 0- to 5-V Signaling
Levels (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V,
5 V)
D Control Inputs Can Be Driven by TTL or
5-V/3.3-V CMOS Outputs
D I_off Supports Partial-Power-Down Mode
Operation
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model
(A114-B, Class II)
− 1000-V Charged-Device Model (C101)
D Supports Both Digital and Analog
Applications: Differential Signal Interface,
Memory Interleaving, Bus Isolation,
Low-Distortion Signal Gating
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
RGY 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
1
1A1 2
2B4 3
1A2 4
2B3 5
1A3 6
2B2 7
1A4 8
2B1 9
10
20
19 2OE
18 1B1
17 2A4
16 1B2
15 2A3
14 1B3
13 2A2
12 1B4
11
description/ordering information
The SN74CB3Q3244 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage
of the pass transistor, providing a low and flat ON-state resistance (r_on). The low and flat ON-state resistance
allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The
device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data
bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q3244 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
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.
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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Copyright  2004, Texas Instruments Incorporated
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