SN74LVTH2952

Specifications

Supply voltage range, V_{CC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .} 0.5 V to 4.6 V
Input voltage range, V_I(see Note 1)_{. . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . .  . . . . . . . . . . . 0.5 V to 7 V}
Voltage range applied to any output in the high-impedance
or power-off state, V_O(see Note 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . .  0.5 V to 7 V
Voltage range applied to any output in the high state, V_O(see Note 1) . . . . . . . . . . . . .  . . . . .0.5 V to V_CC+ 0.5 V
Current into any output in the low state, I_O:SN54LVTH2952 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96 mA
                                                                      SN74LVTH2952. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128 mA
Current into any output in the high state, I_O(see Note 2):SN54LVTH2952 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA
                                                                                           SN74LVTH2952 . . . . . . . . . . . . . . . . . . . . . . . . . . ..  64 mA
Input clamp current, I_IK(V_I< 0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . 50 mA

Output clamp current, I_OK(V_O< 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Package thermal impedance, _JA (see Note 3):DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104°C/W
                                                                       DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139/W
                                                                       DW package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81/W
                                                                       PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120/W
 
Storage temperature range, T_{stg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .} 65 to 150

Description

 These octal bus transceivers and registers SN74LVTH2952 are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.
The SN74LVTH2952 devices consist of two 8-bit back-to-back registers that store data flowing in both directions between two bidirectional buses. Data on the A or B bus is stored in the registers on the low-to-high transition of the clock (CLKENBA  or CLKBA  ) input, provided that the clock-enable (CLKENAB or CLKENBA
) input is low.Taking the output-enable (OEAB  or OEBA ) input low accesses the data on either port.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
When VCC is between 0 and 1.5 V, the devices SN74LVTH2952 are in the high-impedance state during power up or power down.However, to ensure the high-impedance state above 1.5 V, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.