SN54AHCT16374

· Members of the Texas Instruments Widebus^TM Family
· EPIC^TM (Enhanced-Performance Implanted CMOS) Process
· Inputs Are TTL-Voltage Compatible
· Distributed V_CC and GND Pins Minimize High-Speed Switching Noise
· Flow-Through Architecture Optimizes PCB Layout
· Latch-Up Performance Exceeds 250 mA Per JESD 17
· ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
· Package Options Include Plastic Shrink Small-Outline (DL), Thin Shrink Small-Outline (DGG), and Thin Very Small-Outline (DGV) Packages and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Spacings

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 0.5 V to 7 V
Input voltage range, V_I (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 0.5 V to 7 V
Output voltage range, V_O (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to V_CC + 0.5 V
Input clamp current, I_IK (V_I < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  ±20 mA
Continuous output current, I_O (V_O = 0 to V_CC) . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . ±25 mA
Continuous current through each V_CC or GND . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . ±75 mA
Package thermal impedance, _JA (see Note 2): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
                                                                          DGV package . . . . . . . . . . . . . . . . . . .  . . . . . . . . 58°C/W
                                                                          DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63°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 and output voltage ratings may be exceeded if the input and output current ratings are observed.
             2. The package thermal impedance is calculated in accordance with JESD 51.

The SN54AHCT16374 devices are 16-bit edge-triggered D-type flip-flops with 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. SN54AHCT16374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

SN54AHCT16374 can be used as two 8-bit flip-flops or one 16-bit flip-flop. On the positive transition of the clock (CLK) input, the Q outputs of the flip-flop take on the logic levels at the data (D) inputs.

A buffered output-enable (OE) input of SN54AHCT16374 can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs of SN54AHCT16374 neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without need for interface or pullup components.

To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pullup resistor; the minimum value of the resistor SN54AHCT16374 is determined by the current-sinking capability of the driver.

OE does not affect internal operations of the flip-flop. Old data of SN54AHCT16374 can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN54AHCT16374 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74AHCT16374 is characterized for operation from 40°C to 85°C.