ATF22V10B

5

Input Test Waveforms and

Measurement Levels

Output Test Loads

* All except -7 which is R2 = 300

Ω

Note:

1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.

Power-up Reset

The registers in the ATF22V10Bs are designed to reset

output state will depend on the polarity of the output buffer.

This feature is critical for state machine initialization. How-

ever, due to the asynchronous nature of reset and the

uncertainty of how V

following conditions are required:

1. The V

2. After reset occurs, all input and feedback setup times

must be met before driving the clock pin high, and

3. The clock must remain stable during t

Preload of Registered Outputs

The ATF22V10B’s registers are provided with circuitry to

allow loading of each register with either a high or a low.

This feature will simplify testing since any state can be

forced into the registers to control test sequencing. A

JEDEC file with preload is generated when a source file

with vectors is compiled. Once downloaded, the JEDEC file

preload sequence will be done automatically by most of the

approved programmers after the programming.

Security Fuse Usage

A single fuse is provided to prevent unauthorized copying

of the ATF22V10B fuse patterns. Once programmed, fuse

verify and preload are inhibited. However, the 64-bit User

Signature remains accessible.

The security fuse should be programmed last, as its effect

is immediate.

Commercial

Military

Pin Capacitance

Typ

Max

Units

Conditions

58

pF

C

OUT

68

pF

V

Parameter

Description

Typ

Max

Units

Power-up

Reset Time

600

1,000

ns

V

RST

Power-up

Reset

Voltage

3.8

4.5

V