SN54HC393

Features:

Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-A Max ICC
Typical tpd = 13 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 A Max
Dual 4-Bit Binary Counters With Individual Clocks
Direct Clear for Each 4-Bit Counter
Can Significantly Improve System Densities by Reducing Counter Package Count by 50 Percent


Pinout




Specifications

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 7 V
Input clamp current, I_IK (V_I < 0 or V_I > V_CC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_CC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ±20 mA
Continuous output current, I_O (V_O = 0 to V_CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . ±25 mA
Continuous current through V_CC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ±50 mA
Package thermal impedance, JA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86/W
                                                                          DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96/W
                                                                          N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80/W
                                                                          NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76/W
                                                                          PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65 to 150

† 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 51-7.

Description

The 'HC393 devices contain eight flip-flops and additional gating to implement two individual 4-bit counters in a single package.These devices
comprise two independent 4-bit binary counters, each having a clear (CLR) and a clock (CLK) input. N-bit binary counters can be implemented with each package, providing the capability of divide by 256. The 'HC393 devices have parallel outputs from each counter stage so that any submultiple of the input count frequency is available for system timing signals.