16-BIT FET BUS SWITCH
WITH ACTIVE-CLAMP UNDERSHOOT-PROTECTION CIRCUIT
SCDS105D – APRIL 2000 – REVISED NOVEMBER 2001
D Member of the Texas Instruments
D Standard ’16245-Type Pinout
D 5-Ω Switch Connection Between Two Ports
D TTL-Compatible Input Levels
D Ioff Supports Partial-Power-Down Mode
D Active-Clamp Undershoot-Protection
Circuit on the I/Os Clamps Undershoots up
to –2 V
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
The SN74CBTK16245 device provides 16 bits of
high-speed TTL-compatible bus switching in a
standard ’16245 device pinout. The low on-state
resistance of the switch allows connections to be
made with minimal propagation delay.
The A and B ports have an active-clamp
undershoot-protection circuit. When there is an
undershoot, the active-clamp circuit is enabled,
and current from VCC is supplied to clamp the
output, preventing the pass transistor from
DGG, DGV, OR DL PACKAGE
NC – No internal connection
The device is organized as two 8-bit low-impedance switches with separate output-enable (OE) inputs. When OE is
low, the switch is on, and data can flow from the A port to the B port, or vice versa. When OE is high, the switch
is open, and the high-impedance state exists between the two ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
–40°C to 85°C
SSOP – DL
TSSOP – DGG
Tape and reel
Tape and reel
TVSOP – DGV Tape and reel SN74CBTK16245DGVR CP245
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
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Copyright 2001, Texas Instruments Incorporated
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