SN74ALVCH16721

· Member of the Texas Instruments Widebus^TM Family
· EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
· ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
· Latch-Up Performance Exceeds 250 mA Per JESD 17
· Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
· Package Options Include Plastic 300-mil Shrink Small-Outline (DL), Thin Shrink Small-Outline (DGG), and Thin Very Small-Outline (DGV) Packages

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 4.6 V
Input voltage range, V_I (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 4.6 V
Output voltage range, V_O (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . 0.5 V to V_CC + 0.5 V
Input clamp current, I_IK (V_I < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . 50 mA
Output clamp current, I_OK (V_O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Continuous output current, I_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . .. ±50 mA
Continuous current through each V_CC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . ±100 mA
Package thermal impedance, _JA (see Note 3): DGG package . . . . . . .. . . . . . . . . . . . .. 81°C/W
                                                                          DGV package . . . . . . . . . . . . . . . . . . .  . 86°C/W
                                                                          DL package . . . . . . . . . . . . . .. . . . . .. . . 74°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. This value is limited to 4.6 V maximum.
3. The package thermal impedance is calculated in accordance with JESD 51.

This SN74ALVCH16721 20-bit flip-flop is designed specifically for 1.65-V to 3.6-V V_CC operation.

The 20 flip-flops of the SN74ALVCH16721 are edge-triggered D-type flip-flops with qualified clock storage. On the positive transition of the clock (CLK) input, the device provides true data at the Q outputs if the clock-enable (CLKEN) input is low. If CLKEN is high, no data is stored.

A buffered output-enable (OE) input places the 20 outputs in either a normal logic state (high or low) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. OE does not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. To ensure the high-impedance state of SN74ALVCH16721 during power up or power down, OE should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry of SN74ALVCH16721 is provided to hold unused or floating data inputs at a valid logic level.

The SN74ALVCH16721 is characterized for operation from 40°C to 85°C.